HVAC System Replacement — Bay Area
When repair costs approach or exceed the value of the equipment, when efficiency has declined significantly, or when a system has simply reached the end of its useful life, replacement is the right call. AD Mechanical provides honest replacement recommendations backed by load calculations — not upsell pressure.
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
When Does Replacement Make More Sense Than Repair?
- System is 15+ years old and requires a major repair (compressor, heat exchanger, coil)
- Repair cost exceeds 50% of replacement cost
- System uses R-22 refrigerant (phased out — very expensive to recharge)
- Efficiency is below 13 SEER and the system runs constantly
- Multiple component failures in a single season
- Comfort has declined — can no longer reach setpoint on hot or cold days
What We Replace
- Gas and electric furnaces — all brands and efficiencies (80% to 97% AFUE)
- Central air conditioners — 14 SEER2 to 20+ SEER2
- Heat pumps — ducted split and ductless mini-split systems
- Air handlers and fan coil units
- Coil replacements (evaporator and condenser)
- Complete matched system replacement — outdoor unit, air handler, coil, thermostat
Our Replacement Process
- Free in-home load calculation (Manual J) — we size the system to your home
- Written proposal with multiple equipment options and pricing
- Permit pulling where required by jurisdiction
- Full installation including electrical, refrigerant, and ductwork connections
- System startup, commissioning, and performance verification
- Homeowner orientation and thermostat programming
- Rebate paperwork assistance for qualifying equipment
Brands We Install
Carrier, Trane, Lennox, Daikin, Mitsubishi, Fujitsu, Rheem, Bryant, Goodman, and others. We recommend based on application, budget, and parts availability — not dealer incentives.
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