Licensed C-20 Commercial HVAC
24/7 Emergency Available
Commercial HVAC Services in Los Angeles & Orange County
When the HVAC fails in a restaurant, a retail store, or an office, it isn't just uncomfortable — it costs revenue by the hour. United Heating & Air Conditioning has serviced light commercial buildings across Los Angeles County and Orange County for 25 years, with the urgency commercial downtime demands.
- 25 Years in Business
- 24/7 Emergency Service
- CA C-20 License #1094200
- Parts & Labor Guarantee
- Lifetime Guarantee
- Discounts Available
Why United Heating & Air Conditioning for commercial HVAC
We repair, replace, and maintain rooftop package units, split systems, and dedicated server-room cooling for restaurants, retail, offices, medical suites, property-management portfolios, and small industrial spaces — scheduled around your business hours, performed under our C-20 state license, and backed by our parts & labor guarantee. For property managers and multi-site operators, that means one accountable contractor, documented service history per location, and a single 24/7 number for every building.
Downtime treated like the emergency it is
A dining room at 85° or a server room overheating is a business problem, not a comfort problem. Our 24/7 line covers commercial clients too — and we prioritize accordingly.
Rooftop package unit specialists
RTUs are the workhorses of LA and OC commercial buildings, and after 25 years we know every common failure mode — economizers, belts, contactors, compressors — before we're on the roof.
Maintenance built around business hours
We schedule preventive maintenance before you open, after you close, or on your slow days — so tune-ups never cost you customers.
One accountable contractor
Licensed C-20 work, documented service history for your records and warranty compliance, and a direct line to the team that knows your equipment.
HVAC Emergency?
No heat. No cooling. No waiting until morning.
We answer 24 hours a day, 7 days a week — nights, weekends, and holidays — across all of Los Angeles County and Orange County.
Licensed & Accountable
A state-licensed contractor that stands behind the work
United Heating & Air Conditioning holds the CA State Warm-Air HVAC License C-20 #1094200 — the California license classification specifically for warm-air heating, ventilation, and air conditioning. 25 years in business, every job covered by our parts & labor guarantee, and our installations backed by a lifetime guarantee.
- 25 years serving LA & Orange County
- 24/7 emergency availability
- Parts & labor guarantee
- Lifetime guarantee on our installations
Related services
Where we provide commercial HVAC
Commercial HVAC is available across both counties — every city, every neighborhood, 24/7 for emergencies.
Popular service areas
Commercial HVAC — common questions
Do you service rooftop package units?
Yes — RTU repair, replacement, and maintenance is core commercial work for us across LA and Orange County, including crane coordination for full unit swaps.
Can you maintain our HVAC outside business hours?
Yes. We build commercial maintenance schedules around your operating hours — early mornings, evenings, or your slowest weekday — so service never interrupts revenue.
Do you offer commercial emergency service?
Yes — our 24/7 emergency line covers commercial clients. A restaurant losing cooling on a Friday night gets the same urgency as a home with no heat. Call (818) 817-6005.
What size commercial buildings do you handle?
Light commercial is our focus: restaurants, retail, offices, medical suites, multi-unit residential, and small industrial spaces. If you're unsure whether your building fits, call and we'll tell you straight.
Can you take over service from another commercial contractor?
Yes — we start with a full assessment of your equipment, document its current condition honestly, and build a service plan from there. No long-term contract required to start.
Do you work with property managers across multiple buildings?
Yes — multi-site portfolios get one point of contact, per-location service records, and coordinated maintenance schedules. One call covers every building you manage in LA or Orange County.
Need commercial HVAC? Let's handle it.
Call (818) 817-6005 for 24/7 service across Los Angeles County and Orange County, or send the form and we'll call you back.
Call (818) 817-6005CA C-20 License #1094200 · 25years in business · Parts & labor guarantee
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