Quick answers.

We are based in Cerritos and serve homes and businesses in neighboring cities across southeast Los Angeles County and north Orange County. For commercial projects, we work across Southern California.

Yes. We service and repair all makes of heating and cooling equipment, residential and commercial.

Both. We look after homes of every size, and we design, install and maintain commercial systems for offices, warehouses, retail, restaurants, manufacturing and server rooms.

Yes. Comfort Air holds California contractor's license 437478.

Yes, our workmanship is guaranteed.

Yes, we offer 24-hour response, day or night, on 1-800-329-2568.

Yes. For urgent heating and cooling problems, call our 24-hour line, 1-800-329-2568, day or night.

Ideally twice a year: the cooling system in spring and the heating system in fall. At the very least, once a year before the season it works hardest.

Check it every month. A good rhythm here is monthly from May to September and every other month the rest of the year, and more often during wildfire smoke, after Santa Ana winds, or if you have pets.

Yes: change filters, keep the outdoor unit clear, keep vents open and watch for water near the indoor unit.

With good care, air conditioners and heat pumps typically last around 12 to 15 years, sometimes less near the coast. Gas furnaces often last 15 to 20 years or more.

It depends on the system's age, its running costs, its refrigerant and whether there is any safety issue. We will always give you an honest recommendation.

That comes from a room-by-room load calculation of your home, not from the size of the old unit. A system that is too large is as much of a problem as one that is too small.

Yes. In California, replacing heating or cooling equipment requires a permit, and in most cases the ducts must be tested for leakage and the installation verified by an independent rater. We take care of it.

You can keep using and repairing an existing system. R-22 is no longer produced, so refrigerant repairs on those systems are expensive. R-410A is still serviced, but supply is being reduced.

Often, yes. Our mild winters suit heat pumps well, and one system handles both heating and cooling. We will compare running costs for your home honestly.

Yes. Filtration, humidity control, fresh-air ventilation and clean, well-sealed ducts all play a part.

Yes. Programs change often, so we check what is available for your address when we prepare your quote. Note that the federal tax credit for heat pumps and high-efficiency equipment ended for installations after December 31, 2025.

Call us, or request service online and we will get back to you to arrange a time. Tell us what you are noticing and, if you can, the brand and model of your equipment.