Commercial Dehumidifiers in Ontario, CA

#1 AC Guys specializes in commercial dehumidifiers for Ontario, California businesses that need dependable, accurate humidity control. Our mission is healthy air for a healthy life—and that extends to safer workplaces, protected inventory, and comfortable customers and teams.

Engineer‑led solutions for complex spaces

As a fourth‑generation family of engineers with 80+ years in engineering, we approach every project with calculations, not assumptions. We evaluate sensible/latent loads, occupancy, infiltration, ventilation, process gains, and microclimates to recommend the correct dehumidification strategy for your application.

• Refrigerant‑based commercial dehumidifiers (DX, hot‑gas reheat)
• Desiccant systems for low‑dew‑point or process‑critical spaces
• DOAS with reheat for code‑compliant ventilation and moisture control
• Integrated controls with demand‑based dehumidification
• Retrofits to stabilize humidity without oversizing cooling

What we deliver

• Assessment and load calculations tailored to Ontario’s climate
• Design‑build and value engineering for new and existing facilities
• Installation, start‑up, and commissioning with documented performance
• Replacement and upgrades for energy, reliability, and IAQ gains
• Maintenance and repairs to sustain capacity and efficiency
• Controls integration with your BAS/BMS for smarter operation

We specialize in environments where moisture control is mission‑critical: warehouses and logistics, manufacturing, food and beverage areas, retail and hospitality, offices and tenant improvements, gyms and studios, data and telecom rooms, and specialty storage.

Factory‑trained expertise

Our commercial team is factory‑trained by Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China). That training informs our best practices in design, installation, diagnostics, and commissioning—so your system delivers the performance you paid for. We do not just install equipment; we engineer outcomes.

Design details that protect your investment

• Right‑sizing: Capacity matched to peak and part‑load conditions
• Airflow and duct design: Quiet, efficient, and balanced delivery
• Condensate management: Proper traps, slopes, and drainage
• Controls logic: Avoid short‑cycling and humidity bounce
• Sensors and placement: Accurate RH and dew point monitoring
• Filtration and IAQ: Pairing moisture control with cleaner air

We also consider envelope issues—leaks, vestibules, and pressurization—so your dehumidifier isn’t fighting building infiltration. For many sites, adjusting ventilation rates and supply air temperature with reheat is key to maintaining stable indoor humidity without overcooling.

Efficiency and lifecycle value

Energy efficiency is central to our designs. We apply strategies like hot‑gas reheat, variable airflow, demand‑controlled dehumidification, and smart scheduling to cut kWh without sacrificing comfort or product protection. We plan for maintainability—clearances, access, and filtration—so service is faster and total cost of ownership is lower.

Maintenance that prevents problems

Moisture issues escalate quickly. Our maintenance keeps your system within spec:

• Coil and drain cleaning to maintain heat transfer and prevent overflow
• Refrigerant and component checks to preserve capacity
• Sensor calibration to avoid RH drift
• Filter plans aligned with your environment and hours
• Performance trending in your BAS/BMS for early warnings

Our process

• Discovery: Walkthrough, data logging, and goals
• Engineering: Load and psychrometric review, options, and budget
• Build: Installation, start‑up, and commissioning checklist
• Verify: RH and temperature validation against targets
• Sustain: Maintenance and continuous optimization

Serving Ontario, CA and Greater Los Angeles

We proudly serve Ontario and neighboring communities across Greater Los Angeles, including Los Angeles County and nearby areas such as Orange County, Ventura County, and Western Riverside County. Dispatch is fast, and our team is equipped for projects that require careful coordination, safety, and minimal downtime.

Why #1 AC Guys

• 4th‑generation family of engineers with 80+ years in engineering
• Factory training: Fujitsu, Mitsubishi Electric, Midea, Gree, Haier
• Proven on large and complex commercial projects
• Engineer‑led design, precise installation, and thorough commissioning
• Clear communication, documented results, and ongoing care

Ready to stabilize humidity, protect assets, and improve indoor air quality? Book an on‑site assessment in Ontario, CA. #1 AC Guys will design and deliver a commercial dehumidifier solution that works the way it should—day one and every day.

Contact #1 AC Guys to get started.