SERVING THE NORTH BAY
HVAC Services in St. Helena, CA
Heating and Cooling for St. Helena Homes and Light Commercial Properties
Legacy Heating & Air serves St. Helena and the surrounding Napa County area with expert HVAC service for residential and light commercial properties. Whether you need a furnace repaired, an AC system replaced, or a duct system redesigned for an older home, we bring the tools, the training, and the honest approach that St. Helena homeowners expect. Quality work, transparent pricing, and a system that performs the way it should.
SERVING THE NORTH BAY
Heating, Cooling & Ductwork Services
Professional HVAC repair, replacement, and custom ductwork solutions for homes and light commercial properties across Sonoma, Napa, and Marin County.
Furnance & A/C Repair
Fast diagnostics and reliable repairs for heating and cooling systems. We identify the real issue and fix it right the first time.
Custom ductwork & Replacement
Custom duct design and replacement to improve airflow, eliminate leaks, and balance temperatures throughout your home.
Furnace & A/C Replacement
High-efficiency system replacements designed using proper load calculations. Built for your home, not guesswork.
HVAC system diagnostics
Full system evaluations to identify airflow issues, inefficiencies, or performance problems that are often missed.
Preventitive Maintenance
Routine service to keep your furnace and AC running efficiently, extend system life, and prevent costly breakdowns.
System DEsign & Load calculations
Accurate system sizing and duct design for new installs or problem homes that need a real solution.
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.
Request a Free estimate.
Serving Sonoma, Napa, and Marin County. Honest recommendations. No pressure.