Sinclair Air Systems is a family-owned HVAC company based in La Verne, California. We’ve been installing, repairing, and maintaining heating and air conditioning systems across the San Gabriel Valley since 1980. When you call us, you’re talking to the people who actually do the work — not a call center.
We handle residential and commercial HVAC — from new system installs and emergency repairs to scheduled maintenance plans. Our technicians are licensed, experienced, and trained on all major brands. We show up on time, explain what we find, and give you honest pricing before any work starts.
We believe in doing the job right the first time, charging a fair price, and treating every home like our own. We help our customers make smart choices about energy efficiency, system sizing, and long-term value — not just whatever costs the most.
Good HVAC work goes beyond temperature. We help customers with air quality, filtration, and ventilation so your home or business is comfortable and healthy. Whether you need a full system replacement or just a second opinion, we’re here to help.
We live and work in the San Gabriel Valley — La Verne, Covina, Glendora, Azusa, West Covina, and San Dimas are all neighborhoods we know well. Many of our customers have been with us for years, and a lot of our work comes from referrals. That’s the kind of business we want to be.
