Industrial-Grade Cooling, Engineered for Ontario
When uptime, product quality, and worker safety depend on precise temperature control, #1 AC Guys is the partner Ontario facilities trust. We combine 80+ years of engineering know‑how with factory training from Fujitsu, Mitsubishi Electric, Midea, Gree, and Haier to deliver right‑sized commercial HVAC and industrial plant cooling. Our team designs, installs, and services systems using AC PRO‑supplied equipment and OEM parts for dependable availability and swift turnarounds. From chiller plants and cooling towers to VRF and make‑up air, we optimize your system for capacity, energy efficiency, and indoor air quality—so your line stays productive and your air stays healthy. Serving Ontario, CA and nearby Western Riverside and Greater Los Angeles, we offer same‑day assessments, clear scopes, and rigorous commissioning to get results without disruption.