La Verne's Family-Owned HVAC Experts

30+ years of honest pricing, expert repairs, and zero pressure — serving the San Gabriel Valley.

What Our Customers Say

Sinclair Air Systems place picture
4.3
Based on 15 reviews

About Sinclair Air

We’re a family-owned HVAC contractor in La Verne, serving the San Gabriel Valley since 1980. Our licensed technicians specialize in AC and furnace installation, mini splits, repairs, and maintenance — always at honest prices, never with a hard sell.

Whether it’s a same-day repair or a full system replacement, we treat every home like our own.

What We Do

HVAC Services for Homes & Businesses Across the San Gabriel Valley

Home AC & Heating

New system installs, repairs, and maintenance for houses and condos. We'll size it right and keep it running.

Business & Commercial

HVAC installs, repairs, and service for offices, retail, restaurants, and warehouses. Licensed C-20 contractor.

Maintenance Plans

Twice-a-year tune-ups that catch problems early, extend your system's life, and keep your energy bills low.

Common Questions

AC repair in La Verne typically costs between $150 and $600 depending on the issue. Simple fixes like capacitor replacement or refrigerant recharge are on the lower end, while compressor repairs or major component replacements cost more. Sinclair Air Systems provides upfront pricing before any work begins — call (626) 331-4541 for a diagnostic visit.

We recommend servicing your HVAC system at least twice a year — once in spring for your AC and once in fall for your furnace. In the San Gabriel Valley, where summers are intense and systems work hard, semi-annual maintenance helps prevent breakdowns, lower energy bills, and extend equipment life by up to 5 years.

AC sizing depends on your home’s square footage, insulation, window count, ceiling height, and local climate. A general rule is 1 ton of cooling per 500-600 square feet in Southern California. However, an oversized or undersized unit could shorten the lifespan of your system. Sinclair Air performs a size calculation for your project to determine the exact right fit for your home.

Yes! Sinclair Air Systems offers emergency HVAC repair service for the La Verne area and throughout the San Gabriel Valley. When your AC fails during a summer heat wave or your furnace stops on a cold night, call us at (626) 331-4541. We prioritize emergency calls and work to restore your comfort as quickly as possible.

A mini split (also called a ductless system) is a heating and cooling system that doesn’t require ductwork. It consists of an outdoor compressor and one or more indoor air handlers. Mini splits are ideal for room additions, converted garages, older homes without ducts, or areas where you want zone-controlled comfort. They’re highly energy-efficient and qualify for California rebates.

Yes! California homeowners can take advantage of several HVAC rebates and tax credits in 2026. Federal tax credits through the Inflation Reduction Act offer up to $2,000 for heat pump installations. SoCal Edison and SoCalGas also offer utility rebates. The TECH Clean California program provides additional incentives for switching to heat pump technology. Sinclair Air can help you navigate these programs to maximize your savings.

A standard residential AC installation typically takes 1 day for a straight replacement. If new ductwork is needed, it may take 2-3 days. The process includes removing the old equipment, installing the new system, testing for proper operation, and walking you through your new thermostat and system. Sinclair Air schedules installations at your convenience and keeps your home clean throughout the process.

Sinclair Air Systems installs and services all major HVAC brands. We help you choose the best system for your home based on your budget, efficiency goals, and comfort needs — not because we’re locked into one manufacturer. This means you get an honest recommendation every time.

Yes, we offer flexible financing options to make new HVAC installations affordable. We also help you take advantage of California rebates and federal tax credits that can significantly reduce your out-of-pocket cost. Contact us at (626) 331-4541 to learn about current financing programs and available incentives.