Commercial Lennox Rooftop Unit (RTU) Installation in Long Beach

Why Lennox RTUs Fit Long Beach Commercial Buildings

Long Beach’s coastal climate and California’s energy codes make high‑efficiency rooftop units a smart investment. Lennox RTUs offer excellent IEER ratings, quiet operation, and advanced control options that help reduce energy spend while improving comfort and indoor air quality. From small retail suites to multi‑story office buildings, we engineer each installation for airflow balance, ventilation, and long‑term reliability.

• Right‑sized engineering: accurate load calculations and ventilation design for comfort and efficiency.
• Healthy air mission: filtration, fresh air, and economizers for better IAQ and occupant well‑being.
• Lifecycle value: energy savings, maintainability, and smart controls to reduce total cost of ownership.
• Minimal downtime: carefully planned crane lifts, weekend/night changeouts, and clean, safe jobsites.
• Code compliance: Title 24, CalGreen, ASHRAE, seismic anchorage, and smoke/CO₂ controls integration.

Whether you’re upgrading legacy equipment or building out a new tenant space, we align the Lennox model, airflow strategy, and control package to your business goals—comfort, air quality, and predictable operating costs.

Our Commercial RTU Installation Process

• Site assessment & engineering: load/ventilation calculations, roof evaluation, curb/duct review.
• Solution & proposal: Lennox model selection (capacity, efficiency, controls), clear scope and pricing.
• Permits & logistics: Title 24 forms, submittals, scheduling, crane and traffic coordination as needed.
• Pre‑fabrication: curb adapters, duct transitions, seismic hardware, and control components staged.
• Rigging & set: safe crane lift, unit placement, seismic anchorage, roof penetration protection.
• Connections: duct, gas, electrical, condensate management, economizer, and sensor placement.
• Controls & commissioning: thermostat/BAS integration, airflow verification, refrigerant and gas testing, start‑up, and tuning for comfort and efficiency.
• Training & turnover: system walkthrough, filter and maintenance guidance, documentation, and warranty information.

We frequently integrate demand‑control ventilation (DCV) with CO₂ sensors, economizers for free cooling, and building automation via BACnet or open protocols. Where legacy footprints are tight, custom curb adapters and precision duct transitions help reduce roof work and business disruption.
Coastal considerations—like corrosion protection, hail guards, and coil coatings—are addressed to extend equipment life in the marine environment.

Engineers First: 80+ Years, 4 Generations

#1 AC Guys is a fourth‑generation family of engineers with 80+ years of engineering expertise. Our team has been factory‑trained by leading HVAC manufacturers—Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China), and Haier (China). That engineering foundation shows up in our precise sizing, neat workmanship, and ability to solve complex rooftop challenges—tight access, unusual roof structures, phased replacements, and occupied buildings where downtime must be minimized.

New Installs, Retrofits, and Multi‑Unit Changeouts

From single‑zone light commercial spaces to multi‑unit office towers, we manage the full scope: design‑build RTUs for new construction, one‑for‑one replacements with curb adapters, multi‑unit changeouts, and phased retrofits to maintain operations. We can integrate RTUs with VAV boxes, dedicated outdoor air strategies, and smart thermostats or BAS for centralized control and monitoring.

• Retail, restaurants, and hospitality
• Office, medical suites, and schools
• Industrial, warehouses, and flex spaces
• Mixed‑use and multi‑tenant buildings

Compliance, Safety, and Quality

We design and install with California Title 24 and ASHRAE in mind, including economizer requirements, ventilation rates, and control strategies. Safety is embedded in our process—rigging plans, fall protection, lockout/tagout, and clear communication with building management and tenants. We verify airflow, gas pressure, electrical integrity, and controls sequence so your Lennox RTU performs as specified from day one.

Controls, Monitoring, and IAQ

Whether you need a simple commercial thermostat or integration to an existing building automation system, we configure Lennox controls for scheduling, setpoint management, alarms, and energy insights. Our healthy‑air mission drives us to optimize ventilation, filtration, and humidity control to support occupant well‑being and productivity.

Service Area

We proudly serve Long Beach—from Downtown and East Village to Bixby Knolls, Belmont Shore, Los Altos, and Signal Hill—plus Los Angeles County and nearby areas, including Orange County, Ventura County, and Western Riverside County.

Transparent Proposals and Support

Expect clear, fixed‑scope proposals, realistic timelines, and courteous, professional crews. After installation, we offer proactive maintenance options to protect your investment, maintain efficiency, and support warranty requirements with scheduled inspections, filter service, coil cleanings, and IAQ audits.

Get a Quote

Ready to modernize your building with a Lennox rooftop unit? Contact #1 AC Guys for a site assessment and a tailored plan that balances comfort, health, efficiency, and budget—delivered by a fourth‑generation engineering team that treats your rooftop like a mission‑critical asset.