Commercial Rooftop Unit (RTU) Installation in Fullerton — AC PRO Rooftop Units

Your rooftop unit is the heartbeat of indoor comfort, air quality, and energy spend. Our engineering‑first approach ensures your AC PRO RTU is sized, sited, and commissioned correctly—so you get dependable comfort, clean air, and lower operating costs across Fullerton’s warm summers and mild winters.

What’s included in a turnkey commercial RTU installation

• Engineering and load calculations for proper capacity and airflow
• Ventilation strategy: economizers, outside air, and demand control ventilation
• AC PRO RTU selection with efficiency options to meet Title 24 targets
• Structural review, curb adapter design, and vibration isolation
• Crane lift planning, rigging, and safety coordination
• Duct transitions, sealing, and airflow balancing for even comfort
• Electrical disconnects, whips, and controls integration/BAS tie‑in
• Gas piping, condensate management, and code‑required safety devices
• Startup, commissioning, and documentation for warranty and compliance

Why AC PRO rooftop units for Fullerton buildings

AC PRO RTUs offer dependable performance with serviceable designs, high‑efficiency fan systems, and economizer‑ready controls—ideal for retail, office, restaurants, light industrial, and mixed‑use. We match features to your priorities: quiet operation, improved filtration, energy savings, and long‑term serviceability.

Engineering that pays you back

Correct sizing, duct strategy, and ventilation balance are critical. Oversized units short‑cycle and waste energy; undersized units struggle in peak heat. Our engineers model heat gain, occupancy, and ventilation loads, then verify with field data. The result is steadier temperatures, better humidity control, and lower total cost of ownership.

Title 24, CALGreen, and local compliance

We plan your RTU project to align with California Title 24 and local Fullerton requirements, including economizers where required, controls, and acceptance testing. We obtain permits, schedule inspections, and provide commissioning reports for a smooth closeout.

Healthy air by design

Healthy indoor air is our mission. We specify filtration and ventilation that support cleaner air while protecting comfort and efficiency. Options include enhanced filtration, demand‑controlled ventilation, and outdoor air strategies that meet code without over‑ventilating.

Minimal downtime, clear communication

We stage materials, pre‑fabricate curb adapters, and coordinate crane lifts to fit your business schedule. Many replacements are completed in a single coordinated window, reducing disruption. You’ll receive clear updates before, during, and after the install.

Industries we serve in and around Fullerton

• Retail centers, restaurants, and cafés
• Offices, medical/dental suites, and creative spaces
• Warehouses, light manufacturing, and flex spaces
• Schools, churches, and community facilities

Our process

• Site walk and assessment: roof access, curb condition, duct static, electrical/gas
• Engineering and scope: load calc, equipment schedule, controls plan
• Proposal and options: efficiency tiers, IAQ upgrades, maintenance plans
• Permits and logistics: crane plan, safety, inspection roadmap
• Installation day: removal, curb/adapter, set new RTU, hook‑up, start‑up
• Commissioning: airflow balance, controls verification, training, documentation

Precision details that matter

We focus on the details that drive performance and longevity: sealed duct connections, level and isolated curbs, correct gas pressure, proper condensate routing, clean power, and verified airflow. We document static pressures, temperature splits, and economizer operation for your records.

Controls and integration

From simple programmable thermostats to BAS integration, we configure control strategies that align with occupancy and ventilation goals—reducing energy use without sacrificing comfort.

Maintenance and support

Protect your investment with scheduled maintenance tuned to Southern California’s climate. Seasonal checks, coil cleaning, filter changes, belt and bearing inspections, and economizer verification keep your AC PRO RTU running efficiently.

Safety and crane operations

We coordinate crane lifts with clear traffic control, fall protection, and rigging plans. Your team is notified in advance, and work areas are protected during the set. Our goal is a safe lift and a spotless jobsite.

Transparent pricing and options

You’ll receive an itemized scope with equipment options, accessories, and labor—so you can choose the balance of first cost and long‑term savings that best fits your business. Financing options are available through trusted partners.

Where we work

We proudly serve Fullerton and nearby Orange County cities, as well as Los Angeles County, Ventura County, and Western Riverside County. If your building is on the county line, ask us—we often accommodate adjacent areas.

Our heritage and training

#1 AC Guys is a 4th‑generation family of engineers with 80+ years of engineering experience. Our team has trained at the factories of Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China), and Hier (China). That global perspective informs our methods on every AC PRO RTU installation.

Frequently asked questions

• How long does a typical RTU replacement take?
  Most single‑unit replacements are completed within a tightly planned window, often in one business day, depending on curb and electrical conditions.
• Can you swap brands and reuse my curb?
  Often we use a custom curb adapter to fit the new AC PRO RTU to your existing curb—saving time and preserving the roof.
• Do you handle permits and inspections?
  Yes. We manage permits, inspections, and commissioning documentation for Fullerton and surrounding jurisdictions.
• Will my business need to close?
  We plan lifts and cutovers during low‑traffic hours and can provide temporary cooling strategies when needed.

Get your on‑site assessment

Ready to upgrade to a dependable AC PRO rooftop unit in Fullerton? Contact #1 AC Guys for a no‑pressure, engineering‑driven assessment. We’ll deliver a clear plan, a clean install, and lasting comfort backed by our family’s reputation for doing the job right—no shortcuts.