Commercial Ventilation System Installation in Downey, CA

Engineered Ventilation That Meets Code and Boosts Performance

When it comes to commercial ventilation system installation in Downey, CA, #1 AC Guys brings four generations of hands‑on HVAC engineering to every project. We design and build ventilation that aligns with Title 24, local mechanical codes, and ASHRAE standards—so your building gets the fresh air it needs with the efficiency your budget demands.

What We Install

• Make‑up air units and dedicated outdoor air systems (DOAS) for proper pressurization
• Energy recovery ventilators (ERV/HRV) to cut heating and cooling costs
• Rooftop and inline exhaust fans, garage ventilation, and lab or restroom exhaust
• Commercial kitchen ventilation: Type I/II hoods, grease ducts, fans, and tempered make‑up air
• Demand‑controlled ventilation with CO2 sensing and smart BAS integration
• Ductwork, VAV/VVT, economizers, and advanced controls
• Filtration upgrades (MERV 13+), HEPA options, and UV‑C where appropriate

Industries We Serve

Restaurants and food service, retail and mixed‑use, offices and coworking, healthcare and dental, schools and daycare, light industrial and warehouses, labs and specialized facilities, and multi‑family common areas. If it moves air, we can design, build, and balance it—especially large and complex scopes others avoid.

Our Proven Design‑Build Process

1) Discovery and code review: We assess occupancy, process loads, and local requirements for Downey and LA County to right‑size your ventilation strategy.
2) Engineering and submittals: We produce drawings, equipment selections, and specs for permitting and coordination with your architect/GC.
3) Permits and scheduling: We handle paperwork and phase work to minimize downtime, including off‑hours when needed.
4) Professional installation: Clean, safe, and efficient—ducts sealed, supports aligned, penetrations fire‑stopped, and controls neatly commissioned.
5) Testing, adjusting, and balancing (TAB): Airflows verified and documented for compliance and comfort.
6) Turnover and training: You receive O&M documentation, warranty info, and staff training for a smooth handoff.

Why #1 AC Guys

• 4th‑generation family business with 80+ years of engineering expertise
• Factory‑trained by leading manufacturers: Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), Haier (China)
• Special forces for big, challenging projects—tight timelines, occupied spaces, and complex code requirements
• Transparent scopes and clear pricing, with options to match your goals
• Local to Downey with quick mobilization across Los Angeles County, plus Orange, Ventura, and Western Riverside counties

Healthy Air, Real Results

Our mission is healthier indoor air for a healthier life—and business. With properly designed ventilation and right‑sized filtration, your team and customers benefit from cleaner air, better comfort, and consistent pressure control that prevents drafts, odors, and moisture issues. We measure performance and provide proof through commissioning data, so you know your system is doing its job day one and beyond.

Upgrade, Retrofit, or New Build

Whether you are replacing tired exhaust fans, adding ERV to cut energy use, or building out a new space in Downey, we tailor the solution to your building, budget, and timeline. We coordinate with your GC, electrician, and fire/life‑safety teams to keep the job moving and compliant.

Ready to Breathe Easier?

Partner with #1 AC Guys for commercial ventilation system installation in Downey that is engineered, permitted, installed, and balanced the right way. Schedule a site walk and get a fast, no‑obligation proposal today. Serving Downey, all of Los Angeles County, and nearby Orange County, Ventura County, and Western Riverside County.