Commercial Rooftop Unit (RTU) Installation in Oxnard

Your Oxnard partner for commercial rooftop units

When your business needs reliable, energy‑smart rooftop HVAC, #1 AC Guys delivers. We are a fourth‑generation, family‑owned team with 80+ years of engineering experience, specializing in commercial RTU design, replacement, and new installs across Oxnard and greater Ventura County. Our mission is simple: healthy air for a healthy life—delivered with precision installation, clean workmanship, and measurable performance.

Our factory‑trained professionals have hands‑on training with leading manufacturers, including Fujitsu, Mitsubishi Electric, Midea, Gree, and Haier. We thrive on large and complex projects that demand careful planning, logistics, and commissioning.

Why Oxnard businesses choose #1 AC Guys

• Engineering‑first sizing and selections tailored to real‑world loads and usage patterns.
• End‑to‑end project management: permits, curb adaptors, rigging, electrical, gas, and controls.
• Clean, efficient installs coordinated to minimize downtime for tenants and operations.
• Title 24–ready solutions with economizers, DCV, and high‑efficiency options to reduce operating costs.
• Transparent proposals, clear timelines, and detailed closeout documentation.

What’s included in a professional RTU installation

• Site assessment and load calculations to size the unit properly.
• Equipment selection for capacity, efficiency, and serviceability, including multi‑stage or VAV where appropriate.
• Curb fabrication or curb adaptor, roof penetration sealing, and seismic anchorage per local code.
• Duct transitions, economizer integration, and outside air provisions for code‑compliant ventilation.
• Electrical disconnects, wiring, and controls integration; gas piping and condensate routing as required.
• Safety devices and code essentials, including airflow proving and smoke detection where required by code.
• Start‑up, commissioning, and air balancing so you get design airflow and comfort from day one.
• O&M manuals, owner training, and turnover checklist so your team can operate with confidence.

Controls, BMS, and smart ventilation

Whether you need a simple, reliable commercial thermostat or integration with an existing EMS/BMS, we set up controls that match how your building runs. We commission economizers, enthalpy sensors, and demand‑controlled ventilation (CO₂‑based) to balance indoor air quality with energy savings. We can also standardize controls across multiple RTUs to simplify maintenance and monitoring.

Energy efficiency and California compliance

We design with California Title 24 in mind from day one—economizers, fan turndown, and high‑MERV filtration strategies that meet current standards while minimizing pressure penalties. Our team coordinates permits and inspections with the City of Oxnard or Ventura County as applicable and can guide you on potential utility‑savings measures to help lower lifecycle costs.

Safety and crane‑day logistics

RTU work is as much logistics as it is HVAC. We plan lift paths, rigging, staging, and jobsite safety in advance, coordinating with property management and neighboring tenants as needed. Our team sequences roof access, traffic considerations, and crew schedules so the lift happens smoothly, safely, and on time.

Indoor air quality: healthy air for a healthy life

Comfort is only part of the story. We help you improve IAQ with right‑sized outside air, high‑MERV filtration (often MERV‑13 where feasible), and options such as UV‑C in coils or enhanced filtration strategies to address your building’s needs. Better ventilation and filtration can support occupant comfort and productivity while helping control odors and particulates.

Industries and applications we serve

• Offices, retail and shopping centers, and medical suites.
• Restaurants, fitness, and hospitality spaces.
• Light industrial, warehouses, and logistics hubs.
• Schools, places of worship, and multi‑tenant buildings.
From 3‑ to 100‑ton packaged units, single‑zone or multi‑zone, we deliver the same engineering discipline and attention to detail on every job.

Local to Oxnard, serving all of Ventura County

We are proud to serve Oxnard, Ventura, Camarillo, Port Hueneme, Thousand Oaks, Simi Valley, Moorpark, Santa Paula, and Fillmore—plus greater Los Angeles County and nearby areas, including Orange County and Western Riverside County. Wherever you are in Southern California, our team is ready to mobilize for your commercial RTU project.

A fourth‑generation standard of quality

Founded on family craftsmanship and continuous training, #1 AC Guys blends old‑school accountability with modern HVAC engineering. Our installers are factory‑trained by manufacturers such as Fujitsu, Mitsubishi Electric, Midea, Gree, and Haier, and we bring that knowledge to every rooftop we step on.

Get started today

Book a site walk to discuss capacity, placement, ductwork, and controls. We will provide a clear, competitive proposal, schedule crane day, and deliver a code‑compliant installation that performs from the first hour. For Commercial Rooftop Unit (RTU) Installation in Oxnard, choose #1 AC Guys—precision, reliability, and healthy air for a healthy life.