SERVING THE NORTH BAY
Furnace & Air Conditioning Replacement
Properly Sized, High-Efficiency System Replacements for Homes and Light Commercial Properties.
A new system is only as good as the install behind it. Every replacement we do starts with a Manual J load calculation so your new furnace or AC unit is sized correctly for your specific space, not just the closest unit on the shelf. An oversized or undersized system costs you more to run, wears out faster, and never quite keeps up. We carry all major brands, handle the full installation, and make sure your new system is dialed in before we're done.
Your Comfort is our Legacy.
Comfort isn’t luck, it’s built. At Legacy Heating & Air, we design, install, and repair systems with precision, from accurate load calculations to properly engineered ductwork. The result is consistent comfort, lower energy waste, and a system that finally performs the way it should.
LICENSED & INSURED
CSLB Certified Technicians
WHO OFFER
Furnace & A/C Repair
When your system breaks down, we fix it fast and fix it right. We accurately diagnose furnace and AC issues, use quality parts, and make sure everything is running properly before we leave. No guesswork, no shortcuts, just reliable repairs you can trust.
custom ductwork & replacement
Most comfort issues start in the ductwork. We redesign and replace ducts using proper Manual D calculations to eliminate leaks, improve airflow, and balance temperatures throughout your home. Ideal for older homes, difficult layouts, or systems that never felt right.
Furnace & a/c Replacement
Full system replacements built around your home, not a one-size-fits-all unit. We use proper Manual J load calculations to size your system correctly, improving comfort, efficiency, and long-term performance. Lower energy bills, better airflow, and a system that actually keeps up.
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Serving Sonoma, Napa, and Marin County. Honest recommendations. No pressure.