Ontario Commercial Whole‑House Fan Installation

What a commercial “whole‑house fan” does

In commercial buildings, whole‑house style fans provide high‑volume ventilation that purges built‑up heat and stale air, especially during cool evenings and mornings. By exhausting hot indoor air and drawing in filtered outdoor air, these systems reduce peak cooling loads, accelerate morning cool‑downs, and elevate indoor air quality—often with dramatically lower operating cost than mechanical cooling alone.

• Energy savings via night‑flush and shoulder‑season cooling
• Healthier air and comfort through dilution of CO₂ and VOCs
• Faster open‑hour comfort for staff and customers
• Reduced AC runtime and maintenance costs

Where it fits best

Ideal for offices, retail, schools, fitness studios, churches, and light industrial/warehouse spaces (non‑grease environments). We coordinate intake air through filtered louvers or penthouses and balance pressure to avoid drafts, door blow‑by, or negative impacts on existing HVAC. Our team also aligns operation with rooftop units and economizers so systems complement—never conflict.

Our engineering‑led process

• On‑site assessment and objectives: occupancy patterns, heat sources, noise targets, and controls strategy.
• Design and calculations: required CFM, pressure, intake area, relief paths, and sound mitigation per project goals.
• Equipment selection: EC‑motor or VFD‑driven roof/wall fans sized for performance, efficiency, and acoustics.
• Ducting and hardware: curbs, lined duct, motorized dampers, backdraft shutters, gravity relief, and weather hoods with proper flashing and drainage.
• Structure and safety: engineered supports, seismic anchorage, guardrails and clearances per California Building Code and OSHA best practices.
• Controls and integration: stand‑alone or BMS (BACnet/Modbus), CO₂ demand control, schedules, economizer lockouts, and fire alarm interlocks for life‑safety coordination.
• Permits and compliance: City of Ontario plan set and inspections; California Title 24, CALGreen, ASHRAE 62.1/90.1, NFPA 90A; UL‑rated dampers and smoke control interfaces where required.
• Installation and commissioning: clean, coordinated work in occupied spaces; testing, balancing, and staff training with a written commissioning report.

Why #1 AC Guys

We are a fourth‑generation family of engineers with 80+ years in engineering, delivering commercial ventilation that’s precise, durable, and code‑ready. Our team is factory‑trained by Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China). We specialize in large and complex projects, occupied retrofits, and fast‑track timelines—backed by clear communication, meticulous workmanship, and dependable warranties.

Specifications and options

• Fan types: direct‑drive EC motors or belt‑drive with VFD for fine airflow control
• Airflow range: 1,500–30,000+ CFM with static pressure tailored to the building
• Noise control: isolation curbs, lined duct, discharge silencers, and low‑sone fans
• Intake strategies: motorized dampers, filtered penthouses, louver banks with bird/insect screens, secure after‑hours operation
• Filtration and IAQ: MERV‑13+ filtration options and indoor air sensors for CO₂/PM
• Controls: BMS integration, night‑flush logic, demand response readiness, occupancy and temperature scheduling
• Safety and durability: seismic bracing, weatherproof curbs, rain hoods, and robust flashing designed for long‑term performance

Compliance and documentation

Expect complete submittals: drawings, load calculations, sequences of operation, product data, and a commissioning checklist. We coordinate inspections, provide owner training, and leave you with an O&M package for straightforward upkeep.

Service area

Based in Los Angeles, we proudly serve Ontario, CA and neighboring Inland Empire communities, plus Los Angeles County and nearby areas including Orange County, Ventura County, and Western Riverside County. If your facility is near Ontario, there’s a good chance our crew is already working in your vicinity.

Healthy air is our mission

Our mission is healthy air for healthy living. We design systems that measurably improve indoor air quality while lowering operating costs, so your people feel better and your business runs smarter.

Get a precise quote

Schedule a same‑day site walk in Ontario. You’ll receive an itemized, engineer‑led proposal with options, timeline, and any available utility incentive guidance. Ask about after‑hours installs and preventive maintenance for minimal downtime.
Call #1 AC Guys or send plans to get started today.