HVAC in Gilroy, California
How cold does Gilroy get for a heat pump?
Colder than San Jose: the Energy Code's design data put Gilroy's winter extreme lower, and a heat pump here is sized for that. Plus Gilroy's permits, inspections, and what the Air District rules don't do.
On file for Gilroy
Colder nights, and Gilroy's permit file
On file, last checked 2026-10-22
Read next
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Climate
Why does Gilroy's cold matter for a heat pump?
The Energy Code's design tables give each town a heating winter median of extremes, and Gilroy's sits below San Jose's. A heat pump is sized against that number.
Size it right and the backup strip heat stays off. Silicon Valley Clean Energy's guidance: in our climate, auxiliary heat should be avoided by properly air-sealing conditioned spaces and sizing HVAC systems and any needed ductwork appropriately.
Source: California Energy Commission, 2025 Reference Appendices, JA2 Table 2-3 Design Day Data (CEC-400-2025-010). Rules and programs change: last checked 2026-10-22.
Source: Silicon Valley Clean Energy, Electrification Best Panel Practices. Rules and programs change: last checked 2026-10-22.
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Permit
Does furnace work need a permit in Gilroy?
Yes. Gilroy requires a permit for repairs and extensions to mechanical systems, furnace replacements included, applied for through its GO Permit portal.
Source: City of Gilroy Building Division. Rules and programs change: last checked 2026-10-17.
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Inspection
How soon can Gilroy inspect?
The city is 72 hours out for all appointments, and it can charge a reinspection fee for a cancellation on the day itself or a missed inspection.
The permit stays on site throughout the work, with the city-approved plans stamped JOB COPY at each inspection.
Source: City of Gilroy, Building Inspections. Rules and programs change: last checked 2026-10-22.
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Air District
Is my gas furnace now illegal in Gilroy?
No. As Gilroy puts it, the Air District's rules focus only on new equipment and do not outlaw existing equipment or prohibit repairs.
The Air District says the same: the new requirements apply only upon burn out of one's current equipment.
Source: City of Gilroy, Electrification. Rules and programs change: last checked 2026-10-22.
Source: Bay Area Air Quality Management District, Rules 9-4 and 9-6 Building Appliances. Rules and programs change: last checked 2026-10-22.
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Rebate
Is there a heat pump rebate in Gilroy?
Yes: Gilroy is a Silicon Valley Clean Energy member community. Apply before the heat pump goes in, and plan to remove the old gas appliance, as dual fuel sources void qualification.
Source: Silicon Valley Clean Energy, Home Rebates. Rules and programs change: last checked 2026-10-17.
Source: Silicon Valley Clean Energy, Home Rebates Participant Agreement. Rules and programs change: last checked 2026-10-22.
Where we work
The Peninsula line
Our shop is in San Mateo. Every stop below is a city we work in, from San Francisco's neighborhoods down to Gilroy, over to the coast and across to the East Bay. The stops in white have their own page.
- Our shop, San Mateo
- A city with its own page
- We work there too
Along the Bay and El Camino
- San Francisco
- Daly City
- Colma
- Brisbane
- South San Francisco
- San Bruno
- Millbrae
- Burlingame
- Hillsborough
- San Mateo
- Foster City
- Belmont
- San Carlos
- Redwood City
- Atherton
- Menlo Park
- East Palo Alto
- Palo Alto
- Mountain View
- Sunnyvale
- Santa Clara
- San Jose
- Morgan Hill
- San Martin
- Gilroy (this page)
The hills
- Emerald Hills
- Woodside
- Portola Valley
- Stanford
- Los Altos Hills
- Los Altos
- Cupertino
- Monte Vista
- Saratoga
- Monte Sereno
- Los Gatos
- Campbell
The coast
Tell us what it's doing. We'll take it from there.
Call and describe the problem: the noise, the smell, the room that never warms up. Or book a visit online.
