Frequently asked questions

Precise Air Systems was established in 1975 and has proudly provided the highest quality Lennox products to Southern California customers for over 45 years — more than five decades of heating and cooling experience.

Yes. Precise Air Systems is licensed under California CSLB #428900 and fully insured. Our technicians are factory-trained on Lennox equipment.

As your local Lennox dealer in Los Angeles, we install and service the full Lennox line — air conditioners, furnaces, heat pumps, ductless mini-splits, air handlers, package units, and indoor air quality products — matched and installed to manufacturer specification.

Yes — you can find us at your local Costco. It's one more way Southern California homeowners have trusted Precise Air Systems for decades.

We serve Greater Los Angeles and much of Southern California — from the Westside and San Gabriel Valley to Orange County, the Inland Empire, the Coachella Valley, and San Diego County. See our Service Areas page for the full list of 52 communities.

With our long cooling season, we recommend a professional AC tune-up at least once a year — ideally in spring before the first heat wave. Regular maintenance protects efficiency, catches small problems early, and helps preserve your manufacturer warranty.

As a rule of thumb: if your system is over 12–15 years old, needs a major component, or repair costs approach half the price of a new system, replacement usually makes more financial sense — especially with today's high-efficiency Lennox systems lowering monthly bills. We'll always give you a transparent, upfront comparison so you can decide.

Sizing depends on square footage, insulation, window exposure, and ductwork — not guesswork. The 'Precise' in our name is literal: we measure and load-calculate your home before recommending equipment, because an oversized or undersized system costs you comfort and money.

Very well. Ductless mini-splits are ideal for LA's many homes without ductwork, plus additions, ADUs, garages, and room-by-room comfort. They cool and heat efficiently, and Lennox mini-split systems are among the quietest available.

Yes — SoCal winters are mild but real, and foothill and valley communities regularly see chilly nights. An efficient, well-maintained furnace or heat pump keeps your home comfortable without inflated utility bills.

Whole-home air purification, high-MERV media filtration, and proper ventilation make a measurable difference in LA's air. We install Lennox Healthy Climate air cleaners and purification systems that treat every room through your existing HVAC system.

Every job we do includes access to a free comprehensive home safety inspection — checking your system's electrical connections, gas components, and airflow so problems are found before they become hazards. It's one of our standing guarantees.

For most Southern California homes, yes. A properly configured smart thermostat trims cooling and heating costs, adapts to your schedule, and gives you remote control. We install and configure smart thermostats compatible with your Lennox system.

Never. Transparent, upfront pricing with no hidden fees is one of our written guarantees — you approve the price before any work begins.

Yes — flexible financing is available on qualifying Lennox purchases, subject to approved credit. Ask us about current options when you request your estimate.

Yes. Our maintenance plans keep your system tuned twice a year, with priority scheduling and member benefits. See the Maintenance Plans page or call (818) 240-1737 for plan details and pricing.

Always. Thorough cleanup after every completed job is one of our guarantees — we treat your home like our own and leave it the way we found it.