Two counties, one standard
HVAC Service Areas — Los Angeles & Orange County
From our Hollywood headquarters, United Heating & Air Conditioning serves homes and businesses across all of Los Angeles County and Orange County — 25 years of licensed C-20 work, with 24/7 emergency coverage in every city below.
- 25 Years in Business
- 24/7 Emergency Service
- CA C-20 License #1094200
- Parts & Labor Guarantee
- Lifetime Guarantee
- Discounts Available
Los Angeles County
The Valley, the Westside, the South Bay, Long Beach and everything between — our home county for 25 years.
20 cities served — view county hubOrange County
From Anaheim and Irvine to the South County beach cities — full-coverage HVAC service across OC.
20 cities served — view county hubOur coverage area
Los Angeles County cities
Orange County cities
Services available in every city
AC Repair
Fast, guaranteed AC repair for every major brand — backed by 25 years of experience and a parts & labor guarantee.
Learn moreAC Installation
Right-sized system selection, licensed installation, and a lifetime guarantee on our workmanship.
Learn moreEmergency HVAC
True 24/7 response across LA & OC. A live answer at (818) 817-6005 — nights, weekends, and holidays.
Learn moreHeating Repair
Furnaces, heat pumps, and wall heaters — diagnosed and repaired with safety-first gas work, 24/7.
Learn moreFurnace Repair
Ignition, blower, and heat-exchanger repairs with combustion safety checked on every visit.
Learn moreHVAC Maintenance
Real multi-point tune-ups that prevent summer breakdowns, cut energy bills, and protect your warranty.
Learn moreIndoor Air Quality
Filtration, purification, and duct sealing that protect your home's air — especially during smoke season.
Learn moreCommercial HVAC
Rooftop units, restaurants, retail & offices — commercial service scheduled around your business hours.
Learn moreHeat Pumps
One efficient electric system for heating and cooling — ideal for SoCal homes, with honest rebate guidance.
Learn moreDuctwork & Duct Replacement
Testing, sealing, repair & full replacement — because leaky ducts waste the comfort you're paying for.
Learn moreNot sure what you need?
Describe what’s happening and we’ll tell you straight — 24/7, no obligation.
(818) 817-6005In LA or OC? You're covered.
Call (818) 817-6005 — if you're anywhere in Los Angeles County or Orange County, we serve your address, 24/7 for emergencies.
Call (818) 817-6005CA C-20 License #1094200 · 25years in business · Parts & labor guarantee
Request service online
Takes 30 seconds. We respond fast — 24/7.