Commercial Rooftop Unit (RTU) Installation in Los Angeles

For commercial rooftop unit (RTU) installation in Los Angeles, you need more than a swap—you need engineering. At #1 AC Guys, our 4th‑generation family business designs, installs, and commissions rooftop systems that meet California codes, pass inspections the first time, and deliver healthier, more efficient air for years to come.

What We Install

We provide turnkey installation of commercial packaged rooftop units for offices, retail, restaurants, light industrial, schools, and multifamily common areas. Options include gas/electric packaged units, all‑electric heat pump RTUs, multi‑speed and variable‑speed configurations, economizers, dedicated outdoor air with energy recovery, and advanced filtration up to MERV 13 to support healthier indoor environments.

• New RTU installations and like‑for‑like replacements
• Complex retrofits with curb adapters and duct rework
• Economizers, CO2 sensors, and demand‑control ventilation
• BMS integration, sensors, and controls optimization
• Seismic anchorage, vibration isolation, and roof protection

Our Engineered Process

Every building is unique. We start with a thorough assessment: heat/cool load review, airflow and static pressure checks, duct and economizer feasibility, power and gas verification, roof structure and curb dimensions, and code compliance. We then develop a sealed scope and schedule designed to minimize downtime.

• Site walk and data gathering (roof access, lifts, utilities)
• Right‑sizing and selection to meet Title 24 efficiency targets
• Permit package (LADBS or local AHJ) and crane logistics
• Removal, rigging, setting, curb/adapter and connection work
• Start‑up, commissioning, and performance verification
• Owner training, documentation, and warranty registration

We coordinate crane picks, traffic control, and safety plans, and we protect roofing membranes throughout the changeout. Where required, we provide seismic anchorage in line with the California Building Code and ASCE 7. Our commissioning includes refrigerant charge verification, airflow balancing, controls setup, and ventilation checks.

Healthy Air, Lower Energy

Our mission is simple: healthier air for a healthier life—and workplace. We design RTU systems with better filtration, proper ventilation rates, and smart controls to improve indoor air quality while managing operating costs. Features like economizers, demand‑control ventilation, and variable‑speed fans help reduce energy use and support Title 24 compliance.

Why Businesses Choose #1 AC Guys

• 80+ years of engineering heritage across four generations
• Factory‑trained at Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China)
• Expert in large and complex projects, crane lifts, and tight urban sites
• Code‑compliant installs: Title 24, California Mechanical Code, NEC, and local inspection requirements
• Clear proposals with options, timelines, and transparent pricing
• After‑hours or weekend changeouts to reduce downtime
• Licensed, insured, and safety‑first on every roof

What’s Included

Typical scope covers demolition and haul‑away, rigging and crane services, curb/adapter and roof flashings, gas and electrical reconnection, condensate routing, economizer and sensor setup, start‑up, commissioning, and site cleanup. We provide closeout documents, start‑up checklists, and maintenance recommendations to protect your investment.

Service Area

We serve Los Angeles County and nearby areas, including Orange County, Ventura County, and Western Riverside County. Whether you manage a single storefront or a multi‑site portfolio, our team can standardize your RTU specifications and deliver consistent results across locations.

Compliance and Safety

From permit submittals to final inspection, we work to local authority requirements and best practices. That includes Title 24 compliance, proper ventilation verification, seismic anchorage where applicable, and NEC‑compliant electrical. We use roof protection, fall protection, and controlled pick plans to keep your site safe and clean.

Maintenance and Support

After installation, we offer tailored maintenance programs to maintain efficiency and uptime—filter changes, coil cleaning, belt and bearing checks, controls verification, and seasonal start‑ups. Proactive care helps preserve warranties and extends equipment life.

Get Your Engineered Quote

Need commercial rooftop unit installation in Los Angeles? We’re ready to help. Schedule a same‑day site walk and receive an engineered proposal with options that fit your building, budget, and timeline. We proudly serve Los Angeles County and neighboring Orange, Ventura, and Western Riverside Counties.

Call #1 AC Guys or request a visit online—let our 4th‑generation team deliver a rooftop solution that’s safer, smarter, and built to perform.