AC Repair and Heating in San Martin, CA
Modern Air, the family-run HVAC company from Morgan Hill, repairs and installs ACs, furnaces, and heat pumps for San Martin homes. We’ve kept the South Bay comfortable since 2009.
Licensed & insured, CA CSLB #935704 · All brands · Financing available
We answer 24/7 (408) 497-0444
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HVAC in San Martin, From Just Up the Road
When the thermometer climbs past 95°F on a San Martin summer afternoon, the last thing you want is to wait days for a technician. Family-run Modern Air has served this part of the valley from Morgan Hill since 2009, and San Martin is practically our backyard, about 6 miles south on US-101, roughly a 10-minute drive. That proximity means same-day help is often possible, and no-heat or no-cool emergencies get priority.
Built for Rural Homes and Larger Lots
San Martin sits in CEC Climate Zone 4, with hot, dry summers and the wide temperature swings typical of South County. The housing here is genuinely older than its neighbors: about 65% of San Martin homes were built before 1980, with a median build year of 1975, nearly double Morgan Hill’s share of pre-1980 stock. County zoning keeps it that way, one home per five to twenty acres, so houses out here get maintained for decades rather than replaced. Most are ranch-style properties on bigger parcels, and that changes how we approach HVAC. Long horizontal duct runs lose capacity to leaks and poor insulation, and rooms added over the years are often served by undersized returns. Before we quote a repair or a replacement, we look at the whole system, not just the unit that quit, so you don’t pay to cool air that’s escaping into the crawlspace.
A lot of properties near Clos LaChance Winery and the rural stretches off Foothill and Llagas avenues run on propane heat and well water, and the numbers back the impression: census data shows San Martin’s propane share runs about triple Morgan Hill’s or Gilroy’s, and Valley Water counts over 2,200 domestic wells in the Llagas groundwater basin. We service propane furnaces and standard gas systems alike, and we size equipment for the open floor plans and high ceilings common in this part of the valley. Well homes have one more wrinkle, the pump runs on electricity, so when power fails you lose water and comfort together. It’s why we bring up outage planning on rural quotes.
Permits, Title 24, and Rebates
Because San Martin is unincorporated, HVAC permits go through the County of Santa Clara Building Division rather than a city office. We handle that paperwork for you. Every replacement in California has to meet the Title 24 energy code, and we make sure new equipment is documented to pass inspection the first time.
Incentive programs open and close, but Silicon Valley Clean Energy currently offers heat-pump incentives for many San Martin homes. If you’re thinking about moving off propane or replacing an aging AC, a high-efficiency heat pump can cut your energy bills and tap what’s active. We’ll walk you through what’s available, no inflated promises, just the current numbers.
What We Do
- Cooling: AC repair, tune-ups, and right-sized replacements for hot Zone 4 summers.
- Heating: Furnace and propane-system service, plus heat-pump conversions.
- Ductwork: Leak testing and repairs for long ranch-style runs.
- Indoor air quality: Filtration that keeps up with rural dust and pollen, which matters more here than most towns. The air district’s own San Martin monitoring station has recorded the highest summer ozone readings of any station in the Santa Clara Valley, so a real filter strategy isn’t overkill.
Modern Air has been based a few miles from San Martin since 2009, so our techs already know the roads, the homes, and the county process. When you call, you get a real local crew, not a dispatcher three counties away.
Honest, Local Service
Estimates on new systems are free, Modern Air offers Wisetack financing if you’d rather spread the cost, and we give you upfront pricing after we diagnose the problem. Call (408) 497-0444 to get on the schedule. CA CSLB #935704.
A Simple, Transparent Process in San Martin
Call or text us
(408) 497-0444, or send the form and we reach out the same day.
Same-day diagnosis
A local, background-checked tech finds the problem and quotes it upfront.
Fixed right, guaranteed
Clear pricing before work starts. Financing if you need it.
Local Facts That Shape Your HVAC Job
San Martin is an unincorporated rural community in CEC Climate Zone 4 with hot, dry summers above 95°F; many homes are on larger lots with ranch-style ductwork.
California Title 24 energy code applies to all HVAC replacements in San Martin.
County of Santa Clara Building Division (unincorporated San Martin)
San Martin is in Silicon Valley Clean Energy territory, which as of mid-2026 pays a $2,000 rebate when a heat pump replaces a gas furnace, $3,000 income-qualified. Programs open and close, so we confirm what’s active when we quote.
About 6 miles south via US-101, roughly 10 minutes from our Morgan Hill office.
Same-day diagnosis across San Martin, every day.
Complete HVAC Service in San Martin
AC Repair & Installation
Fast diagnosis and right-sized installs on all brands in San Martin.
Cooling →Trusted Across the South Bay
“Andrew was pleasant, professional & found the problem quickly & replaced the furnace part quickly.”
Joy S.San Martin · Furnace repair“Billy came was on time and explained everything about the unit and gave me a lot of very useful information so I could make an informed decision!! It’s great to have guys like this helping you!!”
Bryan C.San Martin · HVAC service“Showed up promptly and quickly identified the problem. Highly recommend.”
Deborah O.San Martin · HVAC serviceNeed an HVAC Tech in San Martin Today?
Call or text Modern Air, a local technician gets back to you the same day.
Call or Text (408) 497-0444
Why San Martin Homeowners Choose Modern Air
Modern Air is a licensed California HVAC contractor (CSLB #935704) based on Church Street in Morgan Hill, About 6 miles south via US-101, roughly 10 minutes from our Morgan Hill office. Our technicians know San Martin’s neighborhoods, its permit process through the County of Santa Clara Building Division (unincorporated San Martin), and the rebates that can cut the cost of a high-efficiency upgrade. That local knowledge means faster service and fewer surprises.
San Martin HVAC Questions, Answered
How fast can you get to San Martin?
San Martin is about 6 miles south of our Morgan Hill office, roughly a 10-minute drive, so Modern Air is often there the same day.
Do you work on older ranch-style ductwork?
Yes. Many San Martin homes sit on larger lots with long duct runs; we inspect for leaks and undersized returns before recommending repairs.
Can you handle homes on propane or well systems?
Yes, we service propane furnaces and standard gas systems, and size cooling for the larger rooms common on rural San Martin parcels.
Are you licensed for work in unincorporated San Martin?
Yes. We pull permits through the County of Santa Clara Building Division and hold CA CSLB #935704.
Do you charge for estimates on a new system?
No. Replacement and new-system estimates are always free.
Schedule Your Free San Martin Estimate Today
Call, text, or send the form, a local technician gets back to you the same day.
