Commercial Rooftop Unit (RTU) Installation in Los Angeles

#1 AC Guys delivers turnkey commercial rooftop unit (RTU) installation and replacement across Los An...

#1 AC Guys delivers turnkey commercial rooftop unit (RTU) installation and replacement across Los Angeles. As a 4th‑generation, family‑owned HVAC team with 80+ years of engineering know‑how, we specialize in complex, large‑scale projects—retail centers, offices, restaurants, warehouses, schools, and more. Our factory‑trained engineers (Fujitsu Japa...

80 years experience in engineering
Available 24/7 for Emergencies
Quick service Same-Day inspection and estimate

★★★★★

95% of clients recommend us

Turnkey Commercial RTU Installation in Los Angeles—Designed, Permitted, Lifted, and Commissioned by 4th‑Generation Pros

We manage the whole RTU project: load calculations, Title 24 compliance, curb adapters, crane logistics, seismic anchorage, electrical/gas, economizers, and BMS integration.
Serving Los Angeles County, Orange County, Ventura County, and Western Riverside County.

Turnkey RTU Installations for Los Angeles Businesses

When your rooftop unit is critical to comfort and productivity, you need a contractor who delivers a seamless install with zero guesswork. #1 AC Guys is a 4th‑generation, family‑owned HVAC company with more than 80 years of engineering experience. We design and install new and replacement commercial RTUs—gas/electric, heat pump, and high‑efficiency packaged systems—from light commercial (3–10 tons) to large multi‑unit projects well beyond that range. We serve offices, retail, restaurants, fitness, warehouses, schools, medical clinics, and multifamily common areas throughout Greater Los Angeles.

Our Proven Process

Site survey and load calculations to right‑size your RTU and reduce lifecycle costs.
Design and engineering: curb adapters, duct transitions, seismic anchorage details, electrical/gas routing, economizers, and controls.
Permitting and compliance: Title 24 documentation, LADBS or local AHJ submittals, and required inspections.
Crane and rigging plan: safe lifts scheduled to minimize business disruption, with traffic/roof access coordination.
Installation: curb setting and flashing, vibration isolation, gas piping, electrical disconnects, condensate management, duct smoke detectors, and outside air per code.
Controls and BMS: thermostat upgrades or integration with your building automation system (DDC).
Start‑up and commissioning: factory‑grade checks, airflow balancing, economizer setup, and performance verification.

Code, Safety, and Quality

We build to California Title 24 energy standards and local Los Angeles requirements, coordinating inspections and documentation from start to finish. Our team prioritizes safety on every lift and rooftop operation, maintaining clean, secure work zones and clear communication with property management and tenants. Expect meticulous workmanship, labeled equipment, as‑built documentation, and dependable scheduling.

Air Quality and Efficiency Options

Healthy, efficient air is our mission. We offer high‑MERV filtration, outdoor air strategies, and demand control ventilation (CO2 sensors) to help maintain better indoor air quality. Economizers, VFD/EC fan upgrades, heat‑pump RTUs, smart thermostats, and advanced controls can lower operating costs while improving comfort. We’ll align recommendations with your budget, utility‑rate structure, and sustainability goals.

Brands We Work With

We install and service all major commercial RTU brands and are factory‑trained by leading manufacturers including Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China). Our brand‑agnostic approach means we specify the right rooftop system for your building—not just one label.

Service Area

Based in Los Angeles, we cover Los Angeles County and nearby service areas—Orange County, Ventura County, and Western Riverside County. Whether it’s a single RTU replacement or a multi‑roof rollout across several properties, our team scales to your timeline and operational needs.

Why #1 AC Guys

4th‑generation expertise and 80+ years of engineering heritage.
Commercial specialists for large and complex RTU projects.
Factory‑trained installers and commissioning technicians.
Transparent scopes, predictable schedules, and proactive communication.
Maintenance programs to protect your investment and keep warranties valid.

Get a Fast Quote

Ready to replace an aging rooftop unit or planning a new commercial build in Los Angeles? Contact #1 AC Guys for a site walk and detailed proposal. We’ll provide options, clear timelines, and a turnkey plan—from engineering and permits to crane day and final commissioning—so your business gets reliable comfort and healthier indoor air with minimal downtime.