Commercial HVAC Control Systems in Ontario, CA

Commercial Control Systems, Engineered for Results

When performance, uptime, and air quality matter, you need an engineering‑driven partner. #1 AC Guys designs and implements commercial HVAC control systems in Ontario, CA that balance comfort, energy savings, and compliance—without sacrificing maintainability. Our team is built to handle big and intricate projects, from multi‑tenant offices and warehouses to hospitality, retail, and healthcare.

We bring 80+ years of engineering expertise across four generations to every phase: assessment, system architecture, device selection, programming, functional testing, and commissioning—backed by training and clear documentation for your staff.

What We Do

• Design/build BAS and BMS for new construction and retrofits
• Controls for VRF/VRV, VAV, RTUs, heat pumps, and zoning
• Integration via BACnet, Modbus, and gateways to existing platforms
• Title 24 controls strategy, acceptance testing coordination, and reporting
• Energy management, scheduling, demand ventilation, and demand response
• Indoor air quality monitoring: CO₂, PM, VOC, humidity, and filtration control
• Remote access, alarms, trending, and analytics for proactive maintenance
• Retro‑commissioning and optimization to reduce kWh/therms without comfort loss

Technologies We Integrate

From core air handlers to the last VAV box, we design around your building’s realities and your team’s workflows.

• VRF/VRV networks with room‑level control and central management
• VAV systems with supply/return tracking, reheat, and CO₂‑based DCV
• Rooftop units with economizers, low‑leak dampers, and high‑efficiency sequences
• Smart thermostats, networked sensors, and zone controllers
• Open protocols: BACnet MS/TP and IP, Modbus RTU and TCP
• FDD (fault detection and diagnostics) and KPI dashboards

Our engineers have trained at manufacturer facilities with Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China). That firsthand knowledge helps us commission faster, solve issues sooner, and fine‑tune sequences for real‑world performance.

AC PRO‑Compatible Solutions

We frequently design and install systems compatible with equipment and parts available through AC PRO, helping Ontario businesses benefit from strong regional inventory, reliable lead times, and lifecycle support. Whether it’s controls‑ready RTUs, VRF accessories, sensors, or airflow components, we align your design with AC PRO‑supplied options to streamline procurement and maintenance without locking you into a closed ecosystem.

Why #1 AC Guys

• 4th‑generation family of engineers with 80+ years in engineering
• Built for complex, large‑scale commercial projects
• Health‑first philosophy: better IAQ, better comfort, better productivity
• Factory training: Fujitsu, Mitsubishi Electric, Midea, Gree, Haier
• Open‑protocol designs for flexibility and future upgrades
• Clean documentation: sequences, drawings, points lists, and trend logs
• Commissioning that proves performance and simplifies handoff
• Responsive service and optimization to keep savings on track

Compliance, Commissioning, and Title 24

California standards are rigorous—and we design for compliance from day one. Our sequences and hardware selections support Title 24 requirements, including scheduling, setpoint limits, economizer logic, ventilation controls, zone/duct static strategies, and demand response readiness. We coordinate acceptance testing, verify point‑to‑point operation, and deliver trend evidence for a smooth closeout.

We can also support CALGreen objectives and site ventilation strategies tailored to occupancy and use, helping you meet both code and corporate ESG goals.

Industries We Serve

• Office, retail, and mixed‑use
• Restaurants and hospitality
• Industrial and distribution
• Healthcare, clinics, and dental suites
• Education and places of worship
• Multifamily common areas and amenities

Our Process

• Assessment: site survey, controls audit, and data review
• Design: sequences of operation, device maps, and submittals
• Integration: panel build, programming, device install, and networking
• Commissioning: functional tests, trend validation, and training
• Optimization: analytics, tuning, and ongoing support

Service Area

We serve Ontario, CA and the Greater Los Angeles region, including Los Angeles County and nearby areas such as Orange County, Ventura County, and Western Riverside County.

Let’s Solve Your Controls Challenge

Whether you’re planning a new build, modernizing an older system, or seeking measurable energy savings, #1 AC Guys delivers commercial control systems that make buildings healthier and more efficient. Tell us about your site in Ontario and we’ll propose an engineered path to better performance—on time and on budget.