Commercial School HVAC Systems in Ontario, CA

Why Ontario Schools Choose #1 AC Guys

#1 AC Guys is a family-run, fourth-generation engineering team with 80+ years of cumulative engineering experience. We specialize in Commercial School HVAC Systems for K–12 and higher education, delivering clean air, comfort, and efficient operation for classrooms, gyms, cafeterias, and administrative spaces. Our Ontario-focused crews are dispatched from Greater Los Angeles, supporting projects across the Inland Empire with minimal downtime and flexible scheduling.

Engineered Indoor Air Quality for Healthy Classrooms

Student health and learning outcomes depend on ventilation that meets real-world conditions. We design systems to align with Title 24 and ASHRAE 62.1 ventilation rates, prioritize MERV 13+ filtration where feasible, and integrate CO2-based demand control ventilation to balance IAQ and energy. Acoustics matter in learning spaces, so we specify quiet equipment, vibration isolation, and proper duct design to keep noise low without compromising airflow.

• MERV 13+ filtration strategies for classrooms and offices
• CO2 monitoring for better ventilation control and reporting
• Economizers, energy recovery, and DOAS for fresh-air delivery
• Balanced airflow, air distribution, and noise reduction

Design-Build, Modernizations, and New Construction

We handle concept-to-commissioning on occupied campuses, coordinating phasing and after-hours work to avoid class disruption. Our engineers develop code-compliant designs, submittals, and closeout documentation, and we collaborate with your team and inspectors to keep approvals smooth and predictable.

• VRF/VRV zoning for classrooms, libraries, and admin suites
• High-efficiency rooftop unit replacements with economizers
• Dedicated Outdoor Air Systems for balanced, code-compliant ventilation
• Hydronic fan coils, boilers/chillers integration where required
• Retro-commissioning and ventilation verification (AB 841/CalSHAPE)

AC PRO–Supplied Reliability and Speed

To control lead times and keep projects moving, we source equipment, parts, and accessories through AC PRO’s Southern California network. This means faster availability, consistent specifications, and responsive warranty processing—critical advantages for school schedules and fiscal-year deadlines.

• Strong local parts availability and logistics support
• Streamlined submittals and like-for-like replacements
• Responsive warranty coordination and documentation

Smart Controls and Remote Visibility

From standalone classrooms to campus-wide systems, we integrate controls that give facility teams the visibility they need. We support BACnet/open protocols, web dashboards, CO2 trending, and schedules that align with bell times and occupancy patterns.

• BAS/BMS integration and trending for indoor air quality
• CO2/DCV sequences to optimize fresh air and energy
• Zone-level control for classrooms and specialty spaces

Preventive Maintenance and Rapid Response

Protect uptime and budgets with school-specific maintenance plans. Our technicians service VRF systems, RTUs, DOAS units, and controls with a safety-first approach and detailed reporting you can use for audits and planning. We provide rapid response in Ontario and surrounding communities.

• Filter changes, coil cleaning, belt and bearing service
• Economizer testing, damper calibration, and sensor verification
• Refrigerant checks, leak detection, and performance tune-ups
• Lifecycle planning and capital replacement roadmaps

Compliance, Documentation, and Funding Support

We streamline compliance with Title 24, ASHRAE 62.1/55, CALGreen, and district standards. Our team prepares ventilation verification reports (AB 841/CalSHAPE), start-up forms, O&M manuals, and training for custodial and facility staff—so your district has the records it needs for audits, grants, and warranties.

Our Training and Technical Depth

Our engineers are factory-trained by Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China). We apply this multi-platform experience across VRF/VRV, ductless splits, rooftop units, DOAS, and integrated controls to deliver robust, serviceable solutions that stand up to school use.

Service Area and Dispatch

We proudly serve Ontario, CA and nearby Inland Empire cities from our Greater Los Angeles base, with projects across Los Angeles County and neighboring areas including Orange County, Ventura County, and Western Riverside County. Crews are scheduled to meet school calendars, with phased work and after-hours options to minimize disruption.

Start with a No-Obligation Assessment

Get a clear, engineering-led path to healthier, more efficient classrooms. We’ll evaluate your current systems, ventilation rates, filtration, and controls; outline prioritized upgrades; and provide transparent budgets and timelines. Partner with #1 AC Guys and AC PRO–supplied solutions to deliver dependable comfort and clean air for every student and teacher in Ontario.