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Sinclair Air Systems place picture
Sinclair Air Systems
4.3
Based on 15 reviews
powered by Google
review us on
alan Mannino profile picture
alan Mannino
14:04 28 Oct 22
I had been putting off a new system for years and finally pulled the trigger. Through a friends recommendation I called Rick. Rick came to my house and explained all that I should be doing in an honest manner. He gave me a price for the complete system and never once had to change his price. I got top of the line service and products and my system runs so well my kids have to tell me to turn it off because I like it cold. Great relationship with the owner Rick and his crew that was clean and always on time.

I give them a 10+

Thanks Rick
Matt Collier profile picture
Matt Collier
22:04 08 Aug 22
Outstanding Customer Service! Dealt with consummate professionals every step of the process. They were able to squeeze me in on short notice and kept me apprised of the technicians arrival time. The technicians were punctual, professional, polite, and fast! Excellent pricing as well. Thanks to Emily, Greg, Carlos and Susie for taking care of my ac issue. Would not hesitate to recommend them to anyone.
Ramiro Rubalcaba profile picture
Ramiro Rubalcaba
17:45 04 Sep 17
Sinclair AC is awesome and they are now my go to AC company. I contacted them when my AC when out during an awful heatwave and they were able to get a technician out to my home same day. The office staff was super friendly, professional and efficient. When the technician arrived he was also friendly, professional and knew what he was doing. He quickly identified the problem, had the part in his vehicle and repaired my AC in less than an hour. The price was great. Thank you Sinclair AC! I give you my highest recommendation! Ramiro Rubalcaba
steven soto profile picture
steven soto
21:33 23 Mar 17
Well let me start by thanking each and everyone of you(Rick, Susie, Miranda, Steve, Billy, Anibal, Dennis, Todd, & Darin) for making my experience with Sinclair Air systems clearly preeminent. They are 90% complete and I love what they have done. The pride & attention to detail Rick and all his crew put into their work is very hard to find when working with multiple craft. It is clear to me at Sinclair Air Systems Rick sets the bar for excellence, and his team easily surpasses that bar. I will continue using Sinclair and will recomend to eveyone I know.!!!!!!
Update .3/26/17
Sinclair Air systems is now completed with the installation in my home. My wife and I could not be happier. This is a company that goes the extra mile to get things done correct.
Sorry for the late finishing review, they actually finished the next day after I wrote my previous review. I just took a while to get back to update. BOTTOM LINE! If you use Sinclair Air systems you a guaranteed good prices, excellent work, & great customer service.
DO NOT GO ANYWHERE ELSE! YOU WILL BE SORRY!

About Us

Your Local HVAC Contractor

Your Trusted Local HVAC Contractor in Covina & Surrounding Areas

At Sinclair Air Systems, we’re a family-owned HVAC contractor proudly serving homeowners and businesses across Los Angeles County and the San Gabriel Valley. For over 30 years, our licensed team has specialized in HVAC installation, mini split systems, AC repair, and preventive maintenance, always treating our customers like family.

When you choose Sinclair, you don’t just get reliable heating and cooling service—you get a team that values trust, transparency, and comfort. That’s why so many Covina, La Verne, San Dimas, and Glendora families count on us for year-round HVAC solutions.

Company Bio

Looking for a trustworthy HVAC contractor who stands behind their work? Our experienced technicians provide AC and furnace installation, ductless mini split installs, indoor air quality upgrades, and HVAC maintenance plans designed to keep your system running at its best.

With decades of hands-on experience, we can quickly diagnose and repair HVAC issues while offering honest recommendations—never high-pressure sales. From small tune-ups to complete system replacements, Sinclair Air Systems delivers dependable service at fair prices, giving you peace of mind and long-lasting comfort in your home.

Company Bio

Our Services

Trusted HVAC Contractor in Covina & the San Gabriel Valley

Residential Services

Sinclair Air Systems specializes in AC Installs, ensuring optimal comfort and air quality in your home.

Residential HVAC Details

Commercial Service

We excel in in commercial HVAC services, meeting the unique needs of businesses and commercial spaces.

View Our Commercial Solutions

Preventive Maintenance

Get our Preventive Maintenance for worry-free HVAC care. Stay cool and save money with upkeep.

Yearly Maintenance Options
Sinclair Air Systems place picture
Sinclair Air Systems
4.3
Based on 15 reviews
powered by Google
review us on
alan Mannino profile picture
alan Mannino
14:04 28 Oct 22
I had been putting off a new system for years and finally pulled the trigger. Through a friends recommendation I called Rick. Rick came to my house and explained all that I should be doing in an honest manner. He gave me a price for the complete system and never once had to change his price. I got top of the line service and products and my system runs so well my kids have to tell me to turn it off because I like it cold. Great relationship with the owner Rick and his crew that was clean and always on time.

I give them a 10+

Thanks Rick
Matt Collier profile picture
Matt Collier
22:04 08 Aug 22
Outstanding Customer Service! Dealt with consummate professionals every step of the process. They were able to squeeze me in on short notice and kept me apprised of the technicians arrival time. The technicians were punctual, professional, polite, and fast! Excellent pricing as well. Thanks to Emily, Greg, Carlos and Susie for taking care of my ac issue. Would not hesitate to recommend them to anyone.
Ramiro Rubalcaba profile picture
Ramiro Rubalcaba
17:45 04 Sep 17
Sinclair AC is awesome and they are now my go to AC company. I contacted them when my AC when out during an awful heatwave and they were able to get a technician out to my home same day. The office staff was super friendly, professional and efficient. When the technician arrived he was also friendly, professional and knew what he was doing. He quickly identified the problem, had the part in his vehicle and repaired my AC in less than an hour. The price was great. Thank you Sinclair AC! I give you my highest recommendation! Ramiro Rubalcaba
steven soto profile picture
steven soto
21:33 23 Mar 17
Well let me start by thanking each and everyone of you(Rick, Susie, Miranda, Steve, Billy, Anibal, Dennis, Todd, & Darin) for making my experience with Sinclair Air systems clearly preeminent. They are 90% complete and I love what they have done. The pride & attention to detail Rick and all his crew put into their work is very hard to find when working with multiple craft. It is clear to me at Sinclair Air Systems Rick sets the bar for excellence, and his team easily surpasses that bar. I will continue using Sinclair and will recomend to eveyone I know.!!!!!!
Update .3/26/17
Sinclair Air systems is now completed with the installation in my home. My wife and I could not be happier. This is a company that goes the extra mile to get things done correct.
Sorry for the late finishing review, they actually finished the next day after I wrote my previous review. I just took a while to get back to update. BOTTOM LINE! If you use Sinclair Air systems you a guaranteed good prices, excellent work, & great customer service.
DO NOT GO ANYWHERE ELSE! YOU WILL BE SORRY!

HVAC Blog

Frequently Asked Questions

AC repair in Covina 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 will cost you more in energy bills and repairs. Sinclair Air performs a Manual J load calculation to determine the exact right size for your home.
Yes! Sinclair Air Systems offers emergency HVAC repair service for the Covina 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.