San Diego Heat Pump HVAC Decision Pack
Heat Pump HVAC
What this pack covers
This Decision Pack covers Heat Pump HVAC in San Diego, CA.
It assembles cost ranges, incentive eligibility, permit requirements, and the questions to ask before signing a contract. Every dollar figure and incentive shown is dated and sourced.
Your goal in one sentence
Choose and install a heat-pump HVAC system right-sized for San Diego's coastal-to-inland climate gradient that delivers verified Manual J / S / D sizing, SDAPCD Rule 69.5.1-aware gas-appliance handling, City of SD DSD-permitted installation, and an honest read of the currently-waitlisted TECH and HEEHRA rebate landscape.
Recommended sequence
- Heat Pump HVAC — No prerequisites within this pack.
Who to contact
| Who | Why | What to ask for |
|---|---|---|
| Electrification-focused HVAC contractor | Designs the heat pump HVAC system and handles ducting, load calculations, rebates, and permits. | Gas furnace to central heat pump conversion, Manual J load calculation, duct assessment, rebate handling. |
| Licensed electrician | Validates panel/service capacity for future electric load; recommends panel upgrade vs smart load management. | Panel size, service size, formal load calculation, upgrade vs load-management options. |
Opening script to send contractors
Hi, I'm in San Diego, CA and planning a project that includes Heat Pump HVAC. I am looking for a quote that includes: 1. Heat Pump HVAC Please tell me: - Will you perform a formal load calculation (Manual J for HVAC, Article 220 for electrical)? - Are you familiar with San Diego permits and any local rebate programs? - Can you give line-item pricing and separate confirmed incentives from assumed incentives? - Who handles permits, inspections, and rebate paperwork?
Technical basics in plain English
Panel size: 100A, 125A, 150A, 200A
Your electrical panel is the main entry point for electricity into your house. The 'A' means amps. More amps means more total electrical capacity. 100A is older and may not support adding heat pump + water heater + EV charger together without an upgrade or smart load management. 125A/150A is middle ground; could work with efficient equipment and a real load calculation. 200A is usually the cleanest path, but not guaranteed.
Ask: What is my panel size, and can you show me the load calculation that proves this setup is safe?
Load calculation
A load calculation is not the same as guessing. It is a code-based calculation that estimates whether your panel and service can safely carry all major electrical loads. A qualified electrician or contractor should be able to explain whether you need a panel upgrade, a service upgrade, or smart load management instead.
Ask: Are you doing a formal electrical load calculation, or just eyeballing the panel?
120V vs 240V
Normal outlets are usually 120V. Large appliances often use 240V, like a dryer or EV charger. Many heat pump HVAC systems, EV chargers, and some water heaters need 240V.
Ask: Which parts of this project require 240V?
Manual J load calculation (HVAC)
Manual J is the standard HVAC sizing calculation. It accounts for home size, insulation, windows, orientation, and ductwork. A good HVAC contractor performs Manual J before sizing the equipment; bad contractors just match the existing furnace tonnage.
Ask: Will you perform a Manual J load calculation before sizing the equipment?
Specific questions to ask
Questions for HVAC contractors
| Question | Good response | Bad response |
|---|---|---|
| Will you perform a Manual J load calculation before sizing the heat pump? | Yes. We calculate heating and cooling load based on home size, insulation, windows, orientation, ductwork, and infiltration. | We just replace the existing furnace with the same tonnage system. |
| Will you inspect ducts before specifying the heat pump? | Yes. We inspect duct size, leakage rate, return air paths, and airflow because heat pumps need good airflow at moderate static pressure. | Ducts are always fine; no need to check. |
| How do you decide system size in tons or BTU? | We explain tons and BTU using Manual J inputs, not just square footage. | We use 1 ton per 500 square feet as a rule of thumb. |
| What refrigerant does the system use, and is it compliant with current EPA rules? | We specify the refrigerant (R-454B or R-32 for new systems after the EPA A2L transition) and confirm it meets current code. | Refrigerant does not affect homeowners. |
| Are you a TECH Clean California enrolled contractor, and is the program currently funded for heat pump HVAC? | We verify current TECH Clean California program status (single-family Phase I has been fully reserved since November 2025) and explain whether it applies before signing. | TECH always pays out; assume the rebate is yours. |
| Does my household income make us eligible for HEEHRA, and what does that involve? | We confirm income eligibility (below 80 percent AMI or 80 to 150 percent AMI), explain pre-approval is required, and verify program status (Phase I single-family is currently fully reserved per CEC as of 2026-02-24). | HEEHRA covers everyone; you qualify automatically. |
| How does the SDAPCD Rule 69.5.1 emissions standard affect a natural-gas furnace or water-heater replacement on this house? | SDAPCD Rule 69.5.1 (effective July 1, 2016) sets a low-NOx emission limit on new natural-gas-fired water heaters under 75,000 BTU/hr sold or installed in San Diego County, and the agency has companion rules covering small space heaters. This is an emissions limit on the unit you install, not a phase-out of gas. We document the rule citation and confirm any quoted gas appliance meets the listed NOx limit. We then walk you through whether a heat-pump path avoids the limit altogether. | SDAPCD rules don't affect homeowners, only contractors. |
| How do you size a heat pump for San Diego given the coastal-to-inland climate gradient (La Jolla mild marine layer vs East County inland heat)? | We run ACCA Manual J 8th Edition with the ASHRAE 99 percent heating design temperature for the SD weather station closest to the home (Lindbergh Field for coastal SD; El Cajon or Ramona for East County) and the cooling-load demand for the microclimate. Coastal homes have minimal cooling load; inland homes carry a real summer cooling load. We do not use a one-size assumption across the county; we share the Manual J output. | We use a 1-ton-per-500-square-feet rule of thumb. |
| Many older SD homes are Spanish-style stucco with single-pane windows. How do you account for that envelope when sizing the heat pump? | We use realistic ACH50 (air changes per hour at 50 Pa) assumptions for the construction era, not a tight new-build default, and adjust the Manual J infiltration inputs accordingly. We confirm window type (single-pane vs dual-pane retrofit) and roof or attic insulation level. Where it makes sense we recommend a blower-door test before final sizing. We do not pretend the envelope is tighter than it is; we share the Manual J inputs we used. | Older SD houses are basically the same as new construction for sizing. |
| What refrigerant does the system use, and how do the A2L safety requirements affect installation? | New residential systems use R-454B or R-32 (both mildly flammable A2L refrigerants). Indoor-unit charge limits set a minimum room volume; we measure the actual indoor location and confirm the manufacturer's listed indoor charge fits the room. If the room is too small, we propose either a different unit or relocating the indoor section. We document the refrigerant choice and the room-volume calculation in the proposal. | A2L safety rules don't matter for homeowners. |
| Where will the outdoor condenser go given typical SD lot sizes, neighbor property lines, and the City noise ordinance? | We propose a location that meets City of San Diego Noise Ordinance limits (50 dBA at the property line in residential zones during the daytime, lower at night) and the manufacturer's required service clearance and clear airflow. For tighter lots we sometimes recommend a side-yard or rear-yard pad with a sound blanket. We share the proposed location and the published decibel rating of the chosen unit in the quote. | Heat pumps are quiet enough; setbacks do not matter in SD. |
| Beyond Manual J, will you also do Manual S equipment selection and Manual D duct design? | Yes. Manual J gives us the load; Manual S matches a specific equipment model and capacity at the design conditions; Manual D sizes the ducts (or confirms existing duct adequacy) for the airflow the equipment needs. We share all three outputs. Skipping Manual S is the most common way contractors end up oversizing in mild SD coastal climates. | Manual J is enough; the other steps are for new construction only. |
| Should we go all-electric heat pump or dual-fuel (heat pump plus gas furnace backup) in SD's mild climate? | In SD the design temperature is mild enough (Lindbergh Field around 42-44F per ASHRAE) that a properly sized inverter heat pump can carry the load down to the coldest hours without backup. Dual-fuel typically does not make sense unless you are keeping a gas appliance for another reason. We share the modeled hours below balance point so the choice is honest, and we note that any future gas appliance you install in SD County still has to meet SDAPCD Rule 69.5.1 NOx limits. | Always keep the gas furnace as backup; heat pumps cannot heat in winter. |
| If we go all-electric, what is the backup-heat strategy at the SD design temperature? | We size the heat pump to carry the design-day load without strip heat. Where the manufacturer requires emergency heat for low-stage failure protection, we install a low-kW electric resistance element with a lock-out at outdoor temperatures above the balance point. We share the modeled hours of strip operation per year, which is typically near zero in coastal SD and a small handful in East County. | All electric heat pumps always need 10kW of strip backup. |
| We are in an East County hillside that the City Fire-Rescue map flags as a Very High Fire Hazard Severity Zone. Does the outdoor unit need anything special? | Most of the SD County hillsides sit in CAL FIRE WUI zones, and the City of San Diego adopted updated Fire Hazard Severity Zone maps effective August 30, 2025. CRC Chapter R327 / R337 sets ignition-resistant material and clearance requirements for structures and accessory equipment in WUI zones; defensible space rules require a clear zone around the outdoor unit. We confirm the WUI zone for the address before we route conduit or place the outdoor unit, and we document the setback in the permit. | WUI rules only apply to brand-new construction. |
| Coronado, Mission Beach, and La Jolla coastal homes get salt air off the ocean. How does that affect warranty terms for the outdoor section? | Manufacturers typically require a corrosion-resistant coil option or coating for coastal installs and may exclude warranty coverage of corrosion-related failures otherwise. We confirm the manufacturer's coastal-install spec, document the coating option in the proposal, and verify the warranty terms (parts, labor, and compressor) in writing. Skipping the coastal option is a recognizable shortcut on SD coastal jobs. | Salt air is not a real issue inside SD city limits. |
| What does commissioning at startup look like, and do I get a report? | Commissioning includes measured airflow at each register, static pressure across the indoor coil, refrigerant charge verified by superheat or subcooling per the manufacturer chart, and outdoor-unit ambient and refrigerant temperatures. We give you a one-page commissioning report with all measured values and the technician name. We do not consider the install complete without it. | Commissioning is a buzzword; the system runs, that is enough. |
| We are in El Cajon / Poway / Ramona. How do you size differently when the cooling load actually matters? | East County summer design temperatures can run 95-100F+, which is a real cooling load very different from coastal SD. We use the closest ASHRAE 1 percent cooling design value for the address and run the full Manual J cooling block. We size the heat pump to meet the cooling load without short-cycling, then verify it still meets the smaller heating load. We do not use coastal sizing assumptions inland. | All SD homes can use the same coastal sizing. |
Questions for electricians
| Question | Good response | Bad response |
|---|---|---|
| What is my panel size and service size, and is it adequate for adding a heat pump? | We inspect the panel labels and main breaker on site, explain whether 100A, 125A, 150A, or 200A is adequate, and verify the service drop matches the panel. | We guess from a photo only; no on-site inspection. |
| Can we avoid a service upgrade by using smart load management? | Possibly. We will perform a formal Article 220 load calculation, propose smart load management for HVAC + EV + water heater coordination, and explain the tradeoff vs upgrading. | You always need 200A; no calculation needed. |
| Will the heat pump need a new dedicated circuit, and what breaker size? | Yes, the outdoor unit and air handler each typically need dedicated circuits at the breaker sizes the manufacturer specifies (often 30-50A for outdoor, 15-30A for indoor). | Any spare breaker will work. |
General questions for every contractor
| Question | Good response | Bad response |
|---|---|---|
| Can you separate confirmed incentives from assumed incentives in the quote? | Yes. We mark each incentive as confirmed (with program ID and current reservation status) versus assumed (subject to verification before contract). | All listed incentives are yours. |
| Does the federal Section 25C tax credit apply to my installation? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installations completed in 2026 or later do not qualify for §25C. | You'll get the federal credit on your taxes. |
| Are BayREN Home+ rebates available for this installation? | BayREN Home+ may apply for Bay Area homeowners; we verify the program is currently funded and that the equipment qualifies before submitting. | BayREN always pays out automatically. |
| What is the equipment and labor warranty, and what voids it? | We provide the manufacturer warranty (typically 10 years parts when registered) plus our labor warranty (1-2 years standard); we explain what voids coverage including improper electrical, missing filters, and skipped annual service. | The warranty covers everything forever. |
| What is the best next step before signing a contract? | Schedule a site visit and Manual J load calculation, get a written quote with line-item pricing, verify all incentive reservation requirements, and confirm permit handling. | Sign today to lock in pricing before incentives expire. |
| Who pulls the mechanical and electrical permits with the City of San Diego Development Services Department and how is that visible to me? | We pull the mechanical permit through City of San Diego DSD (sandiego.gov/development-services, online via opendsd.sandiego.gov) under our contractor license, plus a separate electrical permit if the new circuit requires it. Many residential mechanical and electrical permits in SD qualify for same-day issuance under Information Bulletin 103 / 501 fee schedules. You receive copies of both permit applications, the permit numbers, the inspection schedule, and the final card sign-offs. Permit fees are itemized separately in the proposal, not bundled into labor. | Permits add cost; most heat-pump swaps don't really need one. |
| How does San Diego Community Power's PowerOn default vs Power100 upgrade affect the carbon-accounting story of switching to a heat pump? | SDCP is the default CCA in most of the City of SD. The default PowerOn product is at least 50 percent renewable; Power100 is 100 percent renewable for an extra $0.01 per kWh. Switching from a gas furnace to an electric heat pump moves that combustion load onto your SDCP supply, so the carbon outcome depends on which product you are on. We do not promise a specific carbon number; we explain the product tiers and let you decide. The supplier-side rate (SDCP) replaces SDG&E's generation portion; the delivery portion still goes to SDG&E. | SDCP makes heat pumps automatically zero-carbon. |
| I read about BayREN heat-pump rebates online. Does any of that apply in San Diego? | BayREN is a nine-county Bay Area program; it does not cover San Diego County. The SD heat-pump-rebate landscape is sparser: TECH Clean California is the statewide path (reported fully reserved as of November 14, 2025; new reservations waitlisted), HEEHRA is the federal-funded path (reported fully reserved statewide as of February 24, 2026; new reservations waitlisted), and SDG&E itself does not run a direct heat-pump HVAC rebate independent of TECH. We do not list a BayREN line item in SD quotes; we walk you through what is actually available. | BayREN applies statewide; you qualify for SD. |
| After we install the heat pump, which SDG&E rate plan are you recommending: TOU-DR1, TOU-DR2, or something else? | We model TOU-DR1 (the default residential plan with a 4-9pm summer peak and a 5-8pm winter peak) against TOU-DR2 (a flatter plan) using your most recent 12 months of usage. SDG&E's residential rates are among the highest in the country; the peak vs off-peak spread is wide. For a heat-pump household with little load shifting flexibility TOU-DR2 can win; for a household able to pre-cool or pre-heat off-peak, TOU-DR1 usually wins. We share the spreadsheet. | Everybody on a heat pump should switch to TOU-DR2. |
| Does the federal Section 25C tax credit apply to a 2026 heat-pump install in San Diego? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installs placed in service in 2026 or later do not qualify. Any contractor who quotes a §25C federal credit for a 2026 SD install has it wrong; flag that as a red flag and ask for a corrected quote. | §25C still applies in 2026; you will get 30 percent back on your taxes. |
| Can we get a HEEHRA rebate for a heat pump install in San Diego? | HEEHRA single-family rebates were reported fully reserved statewide as of February 24, 2026 (TECH Clean California / CEC), with new reservations going on a waitlist that only pays out if funding reopens. We do not include HEEHRA as a confirmed line item in the quote unless your reservation is already approved; we list it as waitlisted instead. | HEEHRA covers every California homeowner; the rebate is yours. |
| What about TECH Clean California single-family heat-pump incentives? | TECH Clean California single-family heat-pump and HPWH incentives were reported fully reserved as of November 14, 2025 with no new reservations being accepted; the program is the state-level path SDG&E points homeowners toward for heat-pump rebates. We track reservation availability and disclose status in the quote. We do not list TECH as a confirmed rebate unless a reservation is already approved. | TECH always has funding; you will receive the rebate. |
| Does SDG&E offer any heat-pump financing I should consider over paying cash? | SDG&E has periodically offered on-bill financing for energy-efficient equipment; the specifics change. For a homeowner with cash on hand the cash-plus-confirmed-rebate path is usually cheaper because financing costs more than the rebate's time value. We model both with your numbers and share the math, including SDG&E's current rate-plan choice impact. | The SDG&E loan is free money; always take it. |
Good vs reasonable vs bad answers
| Question | Good | Reasonable | Bad |
|---|---|---|---|
| Will you perform a Manual J load calculation before sizing the heat pump? | Yes. We calculate heating and cooling load based on home size, insulation, windows, orientation, ductwork, and infiltration. | We will run Manual J after a site visit and duct inspection. | We just replace the existing furnace with the same tonnage system. |
| Will you inspect ducts before specifying the heat pump? | Yes. We inspect duct size, leakage rate, return air paths, and airflow because heat pumps need good airflow at moderate static pressure. | We inspect ducts during install and modify if airflow targets are not met. | Ducts are always fine; no need to check. |
| How do you decide system size in tons or BTU? | We explain tons and BTU using Manual J inputs, not just square footage. | — | We use 1 ton per 500 square feet as a rule of thumb. |
| What refrigerant does the system use, and is it compliant with current EPA rules? | We specify the refrigerant (R-454B or R-32 for new systems after the EPA A2L transition) and confirm it meets current code. | — | Refrigerant does not affect homeowners. |
| Are you a TECH Clean California enrolled contractor, and is the program currently funded for heat pump HVAC? | We verify current TECH Clean California program status (single-family Phase I has been fully reserved since November 2025) and explain whether it applies before signing. | — | TECH always pays out; assume the rebate is yours. |
| Does my household income make us eligible for HEEHRA, and what does that involve? | We confirm income eligibility (below 80 percent AMI or 80 to 150 percent AMI), explain pre-approval is required, and verify program status (Phase I single-family is currently fully reserved per CEC as of 2026-02-24). | HEEHRA may apply if eligibility is verified after a site visit and income documentation. | HEEHRA covers everyone; you qualify automatically. |
| What is my panel size and service size, and is it adequate for adding a heat pump? | We inspect the panel labels and main breaker on site, explain whether 100A, 125A, 150A, or 200A is adequate, and verify the service drop matches the panel. | — | We guess from a photo only; no on-site inspection. |
| Can we avoid a service upgrade by using smart load management? | Possibly. We will perform a formal Article 220 load calculation, propose smart load management for HVAC + EV + water heater coordination, and explain the tradeoff vs upgrading. | We need to see your panel labels and load history before recommending. | You always need 200A; no calculation needed. |
| Will the heat pump need a new dedicated circuit, and what breaker size? | Yes, the outdoor unit and air handler each typically need dedicated circuits at the breaker sizes the manufacturer specifies (often 30-50A for outdoor, 15-30A for indoor). | — | Any spare breaker will work. |
| Can you separate confirmed incentives from assumed incentives in the quote? | Yes. We mark each incentive as confirmed (with program ID and current reservation status) versus assumed (subject to verification before contract). | — | All listed incentives are yours. |
| Does the federal Section 25C tax credit apply to my installation? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installations completed in 2026 or later do not qualify for §25C. | — | You'll get the federal credit on your taxes. |
| Are BayREN Home+ rebates available for this installation? | BayREN Home+ may apply for Bay Area homeowners; we verify the program is currently funded and that the equipment qualifies before submitting. | — | BayREN always pays out automatically. |
| What is the equipment and labor warranty, and what voids it? | We provide the manufacturer warranty (typically 10 years parts when registered) plus our labor warranty (1-2 years standard); we explain what voids coverage including improper electrical, missing filters, and skipped annual service. | — | The warranty covers everything forever. |
| What is the best next step before signing a contract? | Schedule a site visit and Manual J load calculation, get a written quote with line-item pricing, verify all incentive reservation requirements, and confirm permit handling. | — | Sign today to lock in pricing before incentives expire. |
| How does the SDAPCD Rule 69.5.1 emissions standard affect a natural-gas furnace or water-heater replacement on this house? | SDAPCD Rule 69.5.1 (effective July 1, 2016) sets a low-NOx emission limit on new natural-gas-fired water heaters under 75,000 BTU/hr sold or installed in San Diego County, and the agency has companion rules covering small space heaters. This is an emissions limit on the unit you install, not a phase-out of gas. We document the rule citation and confirm any quoted gas appliance meets the listed NOx limit. We then walk you through whether a heat-pump path avoids the limit altogether. | We confirm the SDAPCD 69.5.1 NOx limit on any gas-appliance replacement before quoting; heat-pump replacements sidestep the rule. | SDAPCD rules don't affect homeowners, only contractors. |
| How do you size a heat pump for San Diego given the coastal-to-inland climate gradient (La Jolla mild marine layer vs East County inland heat)? | We run ACCA Manual J 8th Edition with the ASHRAE 99 percent heating design temperature for the SD weather station closest to the home (Lindbergh Field for coastal SD; El Cajon or Ramona for East County) and the cooling-load demand for the microclimate. Coastal homes have minimal cooling load; inland homes carry a real summer cooling load. We do not use a one-size assumption across the county; we share the Manual J output. | We run Manual J after the site visit; East County inland sizing usually lands larger than coastal SD for the same square footage. | We use a 1-ton-per-500-square-feet rule of thumb. |
| Who pulls the mechanical and electrical permits with the City of San Diego Development Services Department and how is that visible to me? | We pull the mechanical permit through City of San Diego DSD (sandiego.gov/development-services, online via opendsd.sandiego.gov) under our contractor license, plus a separate electrical permit if the new circuit requires it. Many residential mechanical and electrical permits in SD qualify for same-day issuance under Information Bulletin 103 / 501 fee schedules. You receive copies of both permit applications, the permit numbers, the inspection schedule, and the final card sign-offs. Permit fees are itemized separately in the proposal, not bundled into labor. | We pull permits through SD DSD; we share the application copies once submitted. | Permits add cost; most heat-pump swaps don't really need one. |
| How does San Diego Community Power's PowerOn default vs Power100 upgrade affect the carbon-accounting story of switching to a heat pump? | SDCP is the default CCA in most of the City of SD. The default PowerOn product is at least 50 percent renewable; Power100 is 100 percent renewable for an extra $0.01 per kWh. Switching from a gas furnace to an electric heat pump moves that combustion load onto your SDCP supply, so the carbon outcome depends on which product you are on. We do not promise a specific carbon number; we explain the product tiers and let you decide. The supplier-side rate (SDCP) replaces SDG&E's generation portion; the delivery portion still goes to SDG&E. | If carbon accounting matters to you, Power100 is the simplest path; it is a customer-initiated upgrade on sdcommunitypower.org. | SDCP makes heat pumps automatically zero-carbon. |
| I read about BayREN heat-pump rebates online. Does any of that apply in San Diego? | BayREN is a nine-county Bay Area program; it does not cover San Diego County. The SD heat-pump-rebate landscape is sparser: TECH Clean California is the statewide path (reported fully reserved as of November 14, 2025; new reservations waitlisted), HEEHRA is the federal-funded path (reported fully reserved statewide as of February 24, 2026; new reservations waitlisted), and SDG&E itself does not run a direct heat-pump HVAC rebate independent of TECH. We do not list a BayREN line item in SD quotes; we walk you through what is actually available. | BayREN does not cover SD; TECH and HEEHRA are the realistic paths and both are currently waitlisted. | BayREN applies statewide; you qualify for SD. |
| After we install the heat pump, which SDG&E rate plan are you recommending: TOU-DR1, TOU-DR2, or something else? | We model TOU-DR1 (the default residential plan with a 4-9pm summer peak and a 5-8pm winter peak) against TOU-DR2 (a flatter plan) using your most recent 12 months of usage. SDG&E's residential rates are among the highest in the country; the peak vs off-peak spread is wide. For a heat-pump household with little load shifting flexibility TOU-DR2 can win; for a household able to pre-cool or pre-heat off-peak, TOU-DR1 usually wins. We share the spreadsheet. | We model both before you commit; many SD heat-pump households land on TOU-DR1, but the answer depends on your shifting behavior. | Everybody on a heat pump should switch to TOU-DR2. |
| Many older SD homes are Spanish-style stucco with single-pane windows. How do you account for that envelope when sizing the heat pump? | We use realistic ACH50 (air changes per hour at 50 Pa) assumptions for the construction era, not a tight new-build default, and adjust the Manual J infiltration inputs accordingly. We confirm window type (single-pane vs dual-pane retrofit) and roof or attic insulation level. Where it makes sense we recommend a blower-door test before final sizing. We do not pretend the envelope is tighter than it is; we share the Manual J inputs we used. | We use era-typical infiltration assumptions; a blower-door test is optional but it tightens the Manual J output. | Older SD houses are basically the same as new construction for sizing. |
| What refrigerant does the system use, and how do the A2L safety requirements affect installation? | New residential systems use R-454B or R-32 (both mildly flammable A2L refrigerants). Indoor-unit charge limits set a minimum room volume; we measure the actual indoor location and confirm the manufacturer's listed indoor charge fits the room. If the room is too small, we propose either a different unit or relocating the indoor section. We document the refrigerant choice and the room-volume calculation in the proposal. | We confirm A2L room-volume limits at the site visit; older SD garages and utility rooms sometimes need the indoor section relocated. | A2L safety rules don't matter for homeowners. |
| Where will the outdoor condenser go given typical SD lot sizes, neighbor property lines, and the City noise ordinance? | We propose a location that meets City of San Diego Noise Ordinance limits (50 dBA at the property line in residential zones during the daytime, lower at night) and the manufacturer's required service clearance and clear airflow. For tighter lots we sometimes recommend a side-yard or rear-yard pad with a sound blanket. We share the proposed location and the published decibel rating of the chosen unit in the quote. | We walk the lot at the site visit and propose two locations with the decibel rating noted. | Heat pumps are quiet enough; setbacks do not matter in SD. |
| Beyond Manual J, will you also do Manual S equipment selection and Manual D duct design? | Yes. Manual J gives us the load; Manual S matches a specific equipment model and capacity at the design conditions; Manual D sizes the ducts (or confirms existing duct adequacy) for the airflow the equipment needs. We share all three outputs. Skipping Manual S is the most common way contractors end up oversizing in mild SD coastal climates. | We always do Manual J and Manual S; Manual D is required when we touch ductwork. | Manual J is enough; the other steps are for new construction only. |
| Should we go all-electric heat pump or dual-fuel (heat pump plus gas furnace backup) in SD's mild climate? | In SD the design temperature is mild enough (Lindbergh Field around 42-44F per ASHRAE) that a properly sized inverter heat pump can carry the load down to the coldest hours without backup. Dual-fuel typically does not make sense unless you are keeping a gas appliance for another reason. We share the modeled hours below balance point so the choice is honest, and we note that any future gas appliance you install in SD County still has to meet SDAPCD Rule 69.5.1 NOx limits. | All-electric is the more common SD outcome; we model both before you decide. | Always keep the gas furnace as backup; heat pumps cannot heat in winter. |
| If we go all-electric, what is the backup-heat strategy at the SD design temperature? | We size the heat pump to carry the design-day load without strip heat. Where the manufacturer requires emergency heat for low-stage failure protection, we install a low-kW electric resistance element with a lock-out at outdoor temperatures above the balance point. We share the modeled hours of strip operation per year, which is typically near zero in coastal SD and a small handful in East County. | Backup heat is small in SD; we spec it from the Manual J output. | All electric heat pumps always need 10kW of strip backup. |
| We are in an East County hillside that the City Fire-Rescue map flags as a Very High Fire Hazard Severity Zone. Does the outdoor unit need anything special? | Most of the SD County hillsides sit in CAL FIRE WUI zones, and the City of San Diego adopted updated Fire Hazard Severity Zone maps effective August 30, 2025. CRC Chapter R327 / R337 sets ignition-resistant material and clearance requirements for structures and accessory equipment in WUI zones; defensible space rules require a clear zone around the outdoor unit. We confirm the WUI zone for the address before we route conduit or place the outdoor unit, and we document the setback in the permit. | WUI status changes the placement plan; we verify the zone before quoting and document the setback. | WUI rules only apply to brand-new construction. |
| Coronado, Mission Beach, and La Jolla coastal homes get salt air off the ocean. How does that affect warranty terms for the outdoor section? | Manufacturers typically require a corrosion-resistant coil option or coating for coastal installs and may exclude warranty coverage of corrosion-related failures otherwise. We confirm the manufacturer's coastal-install spec, document the coating option in the proposal, and verify the warranty terms (parts, labor, and compressor) in writing. Skipping the coastal option is a recognizable shortcut on SD coastal jobs. | We spec the coastal corrosion package for Coronado / Mission Beach / La Jolla installs; warranty terms are documented in writing. | Salt air is not a real issue inside SD city limits. |
| What does commissioning at startup look like, and do I get a report? | Commissioning includes measured airflow at each register, static pressure across the indoor coil, refrigerant charge verified by superheat or subcooling per the manufacturer chart, and outdoor-unit ambient and refrigerant temperatures. We give you a one-page commissioning report with all measured values and the technician name. We do not consider the install complete without it. | We do a startup checklist and share the measured values; full Manual D static-pressure verification is included on ducted retrofits. | Commissioning is a buzzword; the system runs, that is enough. |
| Does the federal Section 25C tax credit apply to a 2026 heat-pump install in San Diego? | Section 25C expired December 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21). Installs placed in service in 2026 or later do not qualify. Any contractor who quotes a §25C federal credit for a 2026 SD install has it wrong; flag that as a red flag and ask for a corrected quote. | §25C does not apply to 2026 installs; TECH (waitlisted) and HEEHRA (waitlisted) are the state-level paths still on the table. | §25C still applies in 2026; you will get 30 percent back on your taxes. |
| Can we get a HEEHRA rebate for a heat pump install in San Diego? | HEEHRA single-family rebates were reported fully reserved statewide as of February 24, 2026 (TECH Clean California / CEC), with new reservations going on a waitlist that only pays out if funding reopens. We do not include HEEHRA as a confirmed line item in the quote unless your reservation is already approved; we list it as waitlisted instead. | HEEHRA is waitlisted; we document the reservation status and do not assume it as confirmed savings. | HEEHRA covers every California homeowner; the rebate is yours. |
| What about TECH Clean California single-family heat-pump incentives? | TECH Clean California single-family heat-pump and HPWH incentives were reported fully reserved as of November 14, 2025 with no new reservations being accepted; the program is the state-level path SDG&E points homeowners toward for heat-pump rebates. We track reservation availability and disclose status in the quote. We do not list TECH as a confirmed rebate unless a reservation is already approved. | TECH is paused for new reservations; we document the status and do not assume it as confirmed savings. | TECH always has funding; you will receive the rebate. |
| We are in El Cajon / Poway / Ramona. How do you size differently when the cooling load actually matters? | East County summer design temperatures can run 95-100F+, which is a real cooling load very different from coastal SD. We use the closest ASHRAE 1 percent cooling design value for the address and run the full Manual J cooling block. We size the heat pump to meet the cooling load without short-cycling, then verify it still meets the smaller heating load. We do not use coastal sizing assumptions inland. | We size from the inland design conditions for East County addresses; coastal assumptions do not apply. | All SD homes can use the same coastal sizing. |
| Does SDG&E offer any heat-pump financing I should consider over paying cash? | SDG&E has periodically offered on-bill financing for energy-efficient equipment; the specifics change. For a homeowner with cash on hand the cash-plus-confirmed-rebate path is usually cheaper because financing costs more than the rebate's time value. We model both with your numbers and share the math, including SDG&E's current rate-plan choice impact. | Most homeowners with cash are better off paying directly and stacking confirmed rebates; we model both before you decide. | The SDG&E loan is free money; always take it. |
Green flags, reasonable caveats, red flags
Green flags
- Manual J / S / D calculation provided with SD ASHRAE 99 percent heating design temp and the right coastal-vs-inland weather station
- SDAPCD Rule 69.5.1 NOx limit checked for any gas appliance involved in the work
- Inverter-driven heat pump matched to coastal mild load or East County summer cooling load
- Refrigerant choice (R-454B / R-32) plus A2L safety addressed
- TECH and HEEHRA reservation status documented (both waitlisted as of last verification) not assumed as confirmed savings
Reasonable caveats
- Site visit required before final sizing and quote
- Coastal vs East County inland sizing differs materially; cooling load matters inland
- Coastal salt-air installs (Coronado, Mission Beach, La Jolla) need the manufacturer coastal package
- TECH and HEEHRA rebates are currently waitlisted; reservation status can shift
Red flags
- Quotes without Manual J or with rule-of-thumb sizing
- Claims SDAPCD rules do not affect homeowners
- Bundled lump-sum with no permit-fee itemization
- Promises specific kWh savings without modeling your usage
- Lists §25C federal credit as applicable for 2026+ installs
Quote checklist
Check every item before signing.
Required
Optional but recommended
Quote comparison worksheet
Print this and fill in by hand, or capture quotes side-by-side as you receive them.
| Line item | Contractor 1 | Contractor 2 | Contractor 3 |
|---|---|---|---|
| Quote includes heat pump HVAC equipment model, capacity (tons / BTU), efficiency ratings (SEER2 / HSPF2), and warranty. (required) | |||
| Quote includes a Manual J load calculation, or commits to performing one before final sizing. (required) | |||
| Quote includes a duct inspection, return-air assessment, and any duct modifications needed. (required) | |||
| Quote includes electrical panel/service assessment and any load-calculation requirements. (required) | |||
| Quote explains whether a panel upgrade, service upgrade, or smart load management is needed. (required) | |||
| Quote separates confirmed incentives from assumed or maybe incentives with reservation requirements noted. (required) | |||
| Quote notes the refrigerant type and confirms it meets current EPA rules (R-454B / R-32 for systems installed after the A2L transition). | |||
| Quote notes the heat pump's published HSPF2 / COP at local design temperature and whether backup heat is required. (required) | |||
| Quote includes a startup / commissioning procedure: charge verification, airflow measurement, static pressure check. | |||
| Quote specifies the labor warranty (in addition to manufacturer parts warranty) and what voids each. | |||
| Quote names whether SDAPCD Rule 69.5.1 NOx limit affects any gas appliance involved in the replacement. (required) | |||
| Quote acknowledges the SD coastal-vs-inland sizing assumption (Lindbergh Field coastal vs East County inland) used in Manual J. (required) | |||
| Quote names who pulls the City of SD DSD mechanical and electrical permit (opendsd.sandiego.gov) and itemizes the fee. (required) |
Incentive verification worksheet
| Program | Amount | Eligibility | Pre-approval? | Confidence | Verified | Source |
|---|---|---|---|---|---|---|
| Section 25C Energy Efficient Home Improvement Credit (heat pumps) | Expired Dec 31, 2025. For 2023–2025: up to $2,000/yr (30% of project cost, capped) for qualifying heat pumps and heat pump water heaters. | EXPIRED: This federal credit ended Dec 31, 2025 under the One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025). Installations completed in 2026 or later do not qualify, regardless of when payment was made. For installations completed during 2023–2025, the credit applied to U.S. primary residences with heat pumps or heat pump water heaters that met or exceeded the highest CEE efficiency tier in effect at the start of the install year; starting 2025, the manufacturer's Qualified Manufacturer Identification Number (QMID) was required on the tax return. Homeowners with eligible 2025 installations may still claim the credit on their 2025 federal tax return. Verify with a qualified tax professional. | Verify | high | 2026-05-30 | Internal Revenue Service, Internal Revenue Service, ENERGY STAR (EPA/DOE) |
| California Home Electrification and Appliance Rebates (HEEHRA) — single-family | When available, up to $8,000 (households below 80% AMI) or $4,000 (80–150% AMI) for a qualifying heat pump HVAC system, with additional rebates for heat pump water heaters, electrical panel upgrades, and wiring inside the per-household envelope. Phase I single-family funds are currently fully reserved (waitlist active). | PROGRAM STATUS: Single-family Phase I is FULLY RESERVED statewide as of 2026-02-24 — new single-family applications are not being accepted and a waitlist is in place. Multifamily applications remain open. Phase II is under development pending DOE approval. HEEHRA is California's implementation of the federal IRA Home Electrification and Appliance Rebates program, administered by the California Energy Commission (CEC) with single-family implementation through TECH Clean California. When open, eligibility requires income-qualified single-family homeowners (or landlords with income-qualified tenants) at or below 150% of Area Median Income; income tiers determine rebate amount (below 80% AMI vs 80–150% AMI). Projects must obtain an approved reservation before installation; rebates only apply to heat pumps installed after the reservation is approved. Income verification is required before a contractor can submit a reservation. Replacement of an existing non-heat-pump space heating system is required for the HVAC rebate. Homeowners should check techcleanca.com and the CEC IRA rebate page for re-opening announcements before signing a contract. | Yes | high | 2026-06-08 | California Energy Commission (CEC), California Energy Commission (CEC) / Energy Solutions |
| TECH Clean California — heat pump HVAC incentive (single-family, market-rate) | Currently unavailable: single-family heat pump HVAC incentives are fully reserved as of 2026-05-30. Historical incentive amounts varied by utility service territory and customer income tier — verify against techcleanca.com for re-opening announcements. | PROGRAM STATUS: Single-family heat pump HVAC incentives are FULLY RESERVED as of 2025-11-14 — new single-family reservations are not being accepted. Multifamily program activity continues. TECH Clean California is a statewide CEC initiative administered by Energy Solutions under contract with Southern California Edison on behalf of California utilities under CPUC oversight, designed to accelerate adoption of clean space and water heating. When open, single-family eligibility requires the homeowner to be a customer of a participating California utility, the installation to use an enrolled TECH contractor (1,600+ contractors enrolled statewide), and the project to obtain a reservation before installation. Specific dollar amounts varied by service territory and income tier — refer to techcleanca.com for the next-funded round's amounts and any income-qualified bonus structure. Homeowners should not assume an incentive is available; verify current reservation status with techcleanca.com before signing a contract. | Yes | high | 2026-06-08 | California Energy Commission (CEC) / Energy Solutions, California Energy Commission (CEC) / Energy Solutions |
| California Equitable Building Decarbonization (EBD) Direct Install Program | No-cost direct-install upgrades for income-qualified households — homeowner does not pay out-of-pocket for covered measures. Measures may include heat pump HVAC, heat pump water heater, induction stove, electrical panel upgrade, and weatherization, subject to a per-household scope set by the regional implementer. | Administered by the California Energy Commission (CEC) as the statewide Equitable Building Decarbonization Direct Install Program, with delivery through regional implementers and a separate Tribal Direct Install track. Targets low- and moderate-income households in low-income communities; specific AMI thresholds and per-region eligibility rules are set by the regional implementer rather than statewide. Both single-family homeowners and renters in eligible buildings may qualify, though scope and contractor selection are determined by the implementer (homeowners do not freely choose contractors). The program is funded through California IRA HOMES funding (60% allocation to Direct Install, approximately $130.3M) plus state appropriations. Direct Install retrofits began rolling out in summer 2025. Homeowners interested in EBD should contact the CEC at equitablebuildingdecarb@energy.ca.gov or watch for their regional implementer's launch announcement; the program does not accept open online applications the way TECH or HEEHRA do. | Yes | medium | 2026-05-30 | California Energy Commission (CEC), California Energy Commission (CEC) |
| SDG&E Heat Pump HVAC Rebate — current status | Not currently available as a standalone universal SDG&E rebate. Income-qualified homeowners in qualifying zip codes may qualify through the ESA Whole Home Pilot (narrow track) — see eligibility_summary for routing. | As of 2026-05-30 SDG&E does not advertise a standalone universal residential heat-pump HVAC rebate on its rebates index. SDG&E's electrification landing page routes homeowners to external programs (Golden State Rebates, The Switch Is On, SGIP HPWH path, federal IRA programs) rather than to an SDG&E-administered HVAC rebate. Heat-pump HVAC paths for SDG&E customers in 2026 are: (a) HEEHRA-CA (single-family fully reserved since February 24, 2026; see ca-heehra-single-family), (b) TECH Clean California (single-family fully reserved since November 14, 2025; see ca-tech-heat-pump-hvac), and (c) a narrow income-qualified track via the ESA Whole Home Pilot — administered by MAROMA, statewide cap of 250 customers, zip-code-gated, first-come-first-served, covering up to roughly $25,000 in upgrades including heat pump HVAC and central A/C. Homeowners who don't qualify for HEEHRA, TECH, or the Whole Home Pilot must wait for state programs to reopen or use third-party regional programs. | Verify | high | 2026-05-30 | San Diego Gas & Electric, San Diego Gas & Electric |
Permit verification worksheet
| Permit | Jurisdiction | Applies to | Confidence | Verified | Source |
|---|---|---|---|---|---|
| Mechanical + electrical permit | city | Heat Pump HVAC | high | 2026-05-31 | City of San Diego, City of San Diego, City of San Diego |