20% Todays special Deal in your city
Fontana, CA
20% Todays special Deal in your city
+1 (213) 444-4223
For complex commercial buildings in Fontana, #1 AC Guys designs and delivers ventilation systems tha...
95% of clients recommend us
We offer a wide range of HVAC services catered to both residential and commercial clients. Even the all-powerful Pointing has no control about the blind texts.
When your building’s operations demand steady airflow and verifiable indoor air quality, #1 AC Guys delivers. Our 4th‑generation engineering family brings 80+ years of engineering know‑how to commercial ventilation design, retrofits, and commissioning in Fontana. From high‑bay warehouses and production floors to offices and retail, we right‑size outside air, exhaust, and filtration to ASHRAE 62.1 and Title 24—then tune controls for real‑world savings.
We integrate seamlessly with Lennox rooftop units and other major platforms, optimize economizers and ERVs, and prepare stamped drawings, airflow calculations, and submittals. Expect clear timelines, clean installations, and measurable results. Healthy air is our mission—because healthy spaces power healthy business.
We combine deep engineering discipline with practical field experience to solve airflow at scale—especially in large and complex facilities. Our team is family‑owned, 4th‑generation, and brings 80+ years of engineering expertise to every project. We are factory‑trained with Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China). We regularly design around existing Lennox rooftop units (RTUs), economizers, ERVs/HRVs, and building automation systems to boost performance without wasteful rip‑and‑replace.
Fontana’s logistics‑heavy footprint and hot summers demand resilient ventilation with smart controls. We design outside air and exhaust strategies that stabilize temperature, humidity, and IAQ while keeping energy intensity in check.
Every project begins with a site assessment and data capture: occupancy patterns, processes, pollutant sources, envelope conditions, and existing HVAC assets (including Lennox RTUs and controls). We model airflow, pressure zones, and diversity, then align outdoor air rates with ASHRAE 62.1 and Title 24 ventilation requirements.
We deliver stamped drawings, sequences of operation, equipment schedules, and submittals. Our field team executes with minimal disruption, then performs commissioning and TAB to verify CFM, pressure, and setpoints. You get a ventilation system that performs as designed—documented and reliable.
If your facility runs Lennox rooftop units, we design ventilation to complement them—configuring economizers, integrating ERVs, and coordinating BAS logic for sensible and latent control. From sensor placement to fan curves and static pressure optimization, we help your Lennox equipment operate at its best across seasons.
We translate code into clear actions. Our team designs to ASHRAE 62.1 and Title 24, addresses CalGreen prerequisites, and considers South Coast AQMD guidance relevant to IAQ and emissions. You’ll receive submission‑ready documentation to streamline permits and inspections.
Our mission is healthy air for a healthy life—and that applies to workplaces, too. Better IAQ reduces complaints, supports cognitive performance, and protects sensitive processes. We prioritize filtration efficiency, source control, and outside air quality strategies to navigate wildfires and dust events common to the region.
Based in Greater Los Angeles, we serve Los Angeles County and nearby areas including Orange County, Ventura County, and Western Riverside County—proudly supporting commercial clients in and around Fontana.
Whether you’re expanding a warehouse, modernizing an office, or solving persistent IAQ issues, #1 AC Guys can help. We’re engineers first—practical, precise, and accountable. Let’s design ventilation that pays back in comfort, uptime, and compliance.
Ready to move clean air forward? Contact #1 AC Guys today.
We offer a wide range of HVAC services catered to both residential and commercial clients. Even the all-powerful Pointing has no control about the blind texts.
We offer a wide range of HVAC services catered to both residential and commercial clients.
We offer a wide range of HVAC services catered to both residential and commercial clients.
