Bay Area HVAC Contractor
AD Mechanical Services Inc is a C-20 licensed HVAC contractor based in San Mateo, serving residential and light commercial customers throughout the Bay Area. We handle everything from a same-day AC repair call to a full system replacement with permit.
C-20 Licensed HVAC Contractor — CSLB #1155755
Upfront pricing — written quote before any work begins
Same-day service available for urgent calls
Honest repair vs. replace options, no pressure
Serving the Peninsula & Bay Area
C-20
Licensed HVAC
#1155755
CSLB License
Same-Day
Service Available
All Brands
Major Manufacturers
Our HVAC Services
- AC Repair — Same-day diagnosis and repair for all cooling systems
- AC Maintenance — Annual tune-up to prevent breakdowns and lower bills
- Furnace Repair — No-heat calls prioritized, all fuel types
- Furnace Maintenance — Combustion analysis, safety inspection, tune-up
- Heat Pump Installation — Ducted and ductless mini-split systems
- Heat Pump Repair — Mini-split and ducted heat pump specialists
- HVAC Diagnostic — Second opinions and complex problem-solving
- Commercial HVAC — Light commercial service, maintenance, and installation
- Ductwork Installation — Design, installation, sealing, and replacement
- System Replacement — Full system replacement with load calculation
- Indoor Air Quality — Filtration, ventilation, and IAQ upgrades
Why Customers Choose AD Mechanical
- Licensed and insured — C-20 HVAC contractor license, CSLB #1155755
- Upfront pricing — written quote before any work begins
- Honest repair vs. replace advice — we tell you when replacement makes more financial sense
- All major brands — Carrier, Trane, Lennox, Daikin, Mitsubishi, Fujitsu, Rheem, Bryant, Goodman
- Same-day service available for no-heat and no-cool emergencies
Service Area
San Jose, Santa Clara, Sunnyvale, Mountain View, Palo Alto, Redwood City, San Mateo, Burlingame, Millbrae, San Bruno, South San Francisco, Daly City, San Francisco, and nearby Bay Area cities