Commercial Carrier Rooftop Unit (RTU) Installation in Los Angeles

Choosing the right partner for a Carrier rooftop unit (RTU) installation is the difference between years of reliable comfort and costly callbacks. At #1 AC Guys, we design, install, and commission commercial RTUs with engineering discipline—built for Los Angeles codes, climate, and operating realities. Our mission is healthier air for a healthier life, backed by 80+ years of cumulative engineering experience and four generations of family expertise.

What We Install

We install and replace Carrier commercial packaged rooftop units across a wide range of capacities and configurations to match your building’s needs.

• Gas/electric, electric/electric, and heat pump RTUs
• Economizers, demand-control ventilation, and energy recovery options
• Single-zone and multi-zone applications with VAV/VVT strategies
• Advanced filtration and IAQ upgrades for cleaner, healthier air
• Controls integration with BMS/EMS, BACnet-compatible setups

Our Commercial RTU Process

Every project starts with a detailed site assessment and load calculation to right-size your Carrier RTU. We plan the crane pick, verify roof structure, coordinate curb adapter fabrication, and sequence the change-out to minimize downtime.

• Assessment and sizing: ACCA-compliant load calcs and airflow design
• Permits and code: LADBS coordination, Title 24 compliance, CALGreen
• Rigging and safety: crane plan, roof protection, fall protection
• Electrical and gas: dedicated circuits, gas piping, clearances verified
• Ductwork and curb adapters: custom fit for existing openings
• Controls and startup: sensor placement, economizer tuning, test & balance

On start-up, we verify refrigerant charge, gas combustion safety (when applicable), airflow, economizer operation, and control sequences. We document results so facility teams can operate with confidence.

Compliance, Efficiency, and Documentation

Los Angeles commercial projects demand precision. We build to Title 24 and local amendments, coordinate with inspectors, and provide closeout documentation.

• Title 24 acceptance testing coordination
• LADBS permitting and inspection support
• Economizer and ventilation compliance
• Smoke detector interlocks and electrical labeling
• As-builts, O&M manuals, and maintenance plans

Indoor Air Quality (IAQ) That Means Business

Better air supports productivity and wellness. We design filtration and ventilation strategies that improve IAQ without sacrificing efficiency.

• High-MERV filtration with attention to static pressure
• CO2-based demand-control ventilation
• Humidification/dehumidification strategies
• UV and IAQ accessories when appropriate

Industries We Serve

From single-tenant retail to complex multi-tenant buildings, we deliver Carrier RTU solutions tailored to your operations.

• Office, healthcare, and educational spaces
• Retail, restaurants, and hospitality
• Light industrial, warehouses, and flex spaces
• Mixed-use and multi-tenant commercial properties

Why #1 AC Guys

We are a 4th-generation family of engineers with 80+ years of engineering experience. Our team trained at manufacturer facilities in Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China), and Hier (China). That foundation shapes our approach to installing and commissioning Carrier RTUs—methodical, data-driven, and built for longevity.

• Design-build capability for new and retrofit projects
• Expert crane and rigging coordination in tight LA job sites
• Minimal downtime change-outs and clean job execution
• Transparent proposals and proactive communication

Service Area

Headquartered in Los Angeles, we serve Los Angeles County and nearby regions: Orange County, Ventura County, and Western Riverside County. Whether you manage one building or a portfolio, our team scales to your timeline and complexity.

After-Installation Support

A great installation deserves great care. We offer maintenance plans and seasonal checkups to protect your Carrier RTU investment.

• Preventive maintenance to sustain efficiency
• Filter and belt programs matched to your use patterns
• Proactive performance tuning and fault prevention

Get a Precise Quote

Tell us your building type, tonnage requirements, rooftop access constraints, and desired controls. We will provide a clear, itemized proposal with scope, schedule, permits, crane plan, and commissioning milestones—so you know exactly what to expect.

Ready to upgrade or replace a Carrier rooftop unit in Los Angeles? Contact #1 AC Guys for a site assessment. We make complex commercial RTU projects straightforward—safer installs, cleaner air, lower energy, and a system that works the way it should.

Your building deserves engineering-grade results. Let’s build it right, from curb to controls.