Best HVAC in Gilroy: Who Locals Actually Call
Five Gilroy HVAC contractors homeowners trust for AC repair, furnace service, heat pump conversions, and the 105-degree August call. Homeowner-tested picks from South Valley Spotlight.
Gilroy summers don't mess around. Triple-digit August afternoons, an aging fleet of 90s-era condensers, and homes that bake from late morning. When the AC quits, you need a contractor who knows the area, picks up the phone, and doesn't pad the bill.
So we asked. Neighbors, our subscriber list, the Gilroy homeowner Facebook groups, and folks who've replaced systems in the last two years. Five names came up over and over. Every license has been verified active on the CSLB database, and every phone number has been tested against the business's public listing as of April 2026.
1. Prime Air Conditioning
Service area: Gilroy and South County (Gilroy-based on Rodeo Drive)
Best for: Same-day calls during peak season with a Gilroy crew that doesn't drive in from San Jose
Price tier: Mid; competitive on residential AC and furnace work
Prime is one of the few full-service HVAC shops actually based in Gilroy. 4.9 stars across 37+ Yelp reviews, in business since 2011. Owner-operator answers the phone, which is the difference between same-day service and a callback in two days.
Residential AC install, furnace service, heat pumps, package units, and annual maintenance. Same-day appointments are common during peak season because they aren't driving an hour to get to your house.
Why locals pick them: The truck is already in town. When an emergency call goes out at 1 PM in August, that's the difference between AC by dinner and AC tomorrow.
📞 Call (408) 515-0951 · 📍 Directions
2. Gilroy Heating & Air Conditioning
Service area: Gilroy and South County
Best for: Long-tenure local shop with maintenance contracts and full residential + commercial range
Price tier: Mid; standard on annual maintenance plans
Gilroy Heating is the longest-running HVAC name in town, on Hirasaki Court. Full-service heating and cooling, installs, service calls, and annual maintenance contracts. They handle both residential homes and commercial buildings.
Schedule fills up during July and August, so book non-emergency work early. They're the call when you want a maintenance contract from a contractor who's been in the same town for decades.
Why locals pick them: Tenure. When a shop carries the town's name over the door and is still in business, that signal is hard to ignore.
📞 Call (408) 842-6913 · 📍 Directions
3. Ventwerx HVAC
Service area: Morgan Hill and Gilroy (full coverage)
Best for: Ductless mini-splits, ADU systems, and whole-home duct replacement
Price tier: Mid to mid-high on full retrofits, fair on service calls
Ventwerx has been operating since 2005 and carries 200+ Yelp reviews, which is a high count for this region. AC repair and replacement, ductless mini-split installs, ADU splits, furnace work, duct cleaning, and full duct replacement.
Larger team than the strictly Gilroy-based shops, which means faster response during the July and August AC surge when smaller crews get backed up. The mini-split work is where they stand out. Useful if you're adding an ADU or want zone control on an older home.
Why locals pick them: Mini-split + ADU expertise the smaller shops don't have. If you're building or converting a backyard unit, this is the call.
📞 Call (408) 710-9595 · 📍 Directions
4. Modern Air
Service area: Morgan Hill HQ with dedicated Gilroy service
Best for: Whole-system replacements with consistent crew from diagnostic through install
Price tier: Mid; warranty work strong on follow-up
Modern Air carries a 4.9-star average across 55+ Google reviews. AC install and repair, furnace service, heat pump conversions, and ductwork. They're the right call when you're replacing a whole system and want the same crew handling diagnostic, quote, and install day.
Reviews call out the warranty follow-up, which matters because HVAC issues that show up in month four are a different conversation than ones at week two.
Why locals pick them: Crew consistency on big installs. Same names from the quote walk-through to the day they fire up the new condenser.
📞 Call (408) 497-0444 · 📍 Directions
5. Valley Heating, Cooling, Electrical and Solar
Service area: San Jose HQ with dedicated Gilroy service area
Best for: Heat pump + solar + panel upgrade bundles under one contract
Price tier: Mid to premium on full-home efficiency projects
Valley does HVAC, electrical, and solar under one roof. Heat pump install, solar-paired HVAC, electrical panel upgrades, and full system replacements. Right call if you're bundling a heat pump conversion with solar (and possibly a panel upgrade to support it) and want a single contract instead of three.
Deep bench means same-week installs even during peak season when smaller shops are quoting two weeks out.
Why locals pick them: One contract, one warranty owner, one project manager for HVAC + electrical + solar. The coordination savings on a full-home efficiency project are real.
📞 Call (408) 868-5500 · 📍 Directions
What to Watch for When Hiring an HVAC Contractor in Gilroy
C-20 license + EPA 608 cert
California requires an active CSLB C-20 license for any HVAC job over $500. The technician handling refrigerant also needs an EPA Section 608 certification. Ask for the C-20 license number plus the tech's 608 card before they touch a refrigerant line. Both are verifiable in two minutes online.
Refrigerant transition (R-410A to R-454B)
As of January 2025, new residential AC systems sold in California must use the lower-GWP refrigerant R-454B. R-410A is still serviceable on existing units, but a quote to "top off" your old system with R-410A in 2026 should price 2-3x what it cost in 2023 because of phase-down supply. If a contractor is pushing a brand-new R-410A system, ask twice. They're selling old inventory.
Title 24 + permit pull
The City of Gilroy requires a mechanical permit for AC condenser and furnace replacements. The contractor pulls it. The permit triggers a Title 24 compliance check that confirms the new system is correctly sized and properly installed. Skipping the permit (which some contractors offer to "save you money") often voids your homeowner's insurance on future HVAC-related damage claims.
PG&E rebates + heat pump math
PG&E and the federal Inflation Reduction Act both offer rebates for heat pump conversions, but the paperwork has to be filed before the work starts and the equipment has to meet specific efficiency tiers. A contractor who knows the program will file on your behalf. One who doesn't might cost you $3,000 to $8,000 in lost rebate. Ask up front whether they handle the paperwork.
Gilroy HVAC Price Reality Check
Service call (diagnostic): $95 to $175 standard hours, $200 to $350 emergency
Capacitor or contactor replacement: $200 to $450
Furnace tune-up (annual): $99 to $200
AC compressor replacement: $1,500 to $3,200
Full AC + furnace replacement (3-ton, single-family): $8,000 to $14,000
Heat pump conversion with electrical work: $12,000 to $22,000 before PG&E and federal rebates
FAQ
How much does an HVAC service call cost in Gilroy?
Standard diagnostic visits run $95 to $175 during normal hours. Peak summer emergency calls run $200 to $350. A full AC replacement on a typical Gilroy single-family home runs $8,000 to $14,000. Heat pump conversions run $12,000 to $22,000 before rebates. Get two quotes on anything over $5,000.
Do I need a permit for AC replacement in Gilroy?
Yes. The City of Gilroy requires a mechanical permit for AC condenser and furnace replacements. A licensed C-20 contractor pulls it. The permit triggers a Title 24 compliance check. Unpermitted HVAC work can void your homeowner's insurance and complicate a future home sale.
Want more local recommendations?
Browse the South Valley Spotlight directory for vetted local service providers across Gilroy, Morgan Hill, and San Martin. New listings every week.
Got a Gilroy HVAC contractor your neighbors should know about? Email [email protected].