Commercial Exhaust Fans in Downey, CA

Engineered Ventilation That Works as Hard as You Do

In Downey, proper commercial exhaust isn’t optional—it’s essential for safety, comfort, and compliance. #1 AC Guys delivers end‑to‑end solutions for commercial exhaust fans, from design and installation to repair, retrofits, and maintenance. Every project is engineered for the right airflow (CFM), static pressure, acoustics, and energy efficiency to keep your operation running smoothly and within code.

Why Downey Chooses #1 AC Guys

• Fourth‑generation, family‑run HVAC company with 80+ years of engineering expertise in Southern California.
• Local to Los Angeles County with fast response times for Downey businesses.
• Factory‑trained technicians (Fujitsu, Mitsubishi Electric, Midea, Gree, Haier) and experienced across leading exhaust and hood systems.
• Proven results on large and complex commercial projects—restaurants, production facilities, labs, and more.
• Transparent scopes, code‑compliant installations, and detailed commissioning reports.

Commercial Exhaust Fan Services We Offer

Design/Build & Retrofits: We size fans for your ductwork, hoods, and heat loads, model static pressure, and select equipment to meet performance and Title 24 requirements. Retrofits include curb adapters, fan curve matching, and motor/drive upgrades for better efficiency.

Installation & Replacement: Rooftop upblast fans (UL 762 for grease), inline centrifugal and tube axial fans, utility sets, and dedicated smoke exhaust. We integrate make‑up air (MAU), demand control kitchen ventilation (DCKV), and VFD controls for quiet, efficient operation.

Repair & Emergency Service: Rapid diagnostics for belt/bearing failures, motor issues, vibration, overheating, tripped breakers, and airflow loss. We stock common parts and get you back online fast.

Testing, Adjusting & Balancing (TAB): We measure CFM, static pressure, amp draw, and vibration, then tune your system for proper capture velocity at the hood and safe dilution in the space.

Planned Maintenance: Scheduled belt changes, bearing lubrication, motor amperage checks, fastener and curb inspections, grease containment service, filter and baffle cleaning coordination—everything needed to prevent downtime and extend equipment life.

Systems We Service

• Upblast and sidewall centrifugal fans (UL 762 for grease applications)
• Inline centrifugal and tube axial fans for long duct runs
• Utility set and roof‑mounted exhaust fans with curb adapters
• Make‑up air units (direct and indirect fired)
• Hood systems with baffle filters and grease duct (UL 1978) integration
• Interlocks with fire suppression, DCKV, and VFD speed controls
• Specialized exhaust for welding, lab fume, battery rooms, and light manufacturing

Code, Safety, and Permitting—Handled

Your project is designed and executed to meet NFPA 96 for commercial cooking ventilation, California Mechanical Code, Title 24 energy standards, local Los Angeles County and City of Downey requirements, and OSHA best practices. We coordinate permits and inspections, verify clearances to combustibles, specify grease‑rated components, and set up grease containment per code so your roof stays clean and safe. Where applicable, we align with South Coast AQMD guidance for air quality compliance.

The Right Fan, Correctly Sized

We don’t guess. We calculate capture and transport velocities, hood and duct losses, total system static, and select a fan that lives in the right part of its curve—even after filters load and belts wear. The result: reliable extraction, less noise, lower energy spend, and longer equipment life.

Our Proven Process

1) On‑site assessment and airflow measurements in Downey
2) Load calculations, fan selection, and controls strategy
3) Clear proposal with scope, timeline, and permitting plan
4) Professional installation with safety protocols and housekeeping
5) Commissioning with TAB, training your staff on operation and maintenance
6) Ongoing service with a tailored preventive maintenance schedule

Maintenance Plans That Prevent Downtime

Restaurants and production lines can’t afford a stalled fan. Our PM visits include belts and sheaves inspection, bearing and shaft alignment, motor amperage and temperature checks, vibration trending, fastener torque, curb and flashing condition, grease containment service, and cleaning coordination for hoods and ducts. You get a digital report with photos, readings, and recommendations—so you can plan, not react.

Industries We Support in Downey

• Restaurants, ghost kitchens, and cafeterias
• Food processing and commissaries
• Warehousing and light manufacturing
• Automotive and metal fabrication shops
• Laboratories, R&D, and clean workspaces

Brands & Training

Our engineers are factory‑trained by manufacturers including Fujitsu, Mitsubishi Electric, Midea, Gree, and Haier, and we routinely service leading fan and hood brands used in commercial exhaust systems. Whatever is on your roof or in your plenum, we’ve likely installed, repaired, or balanced it before.

Local, Fast, and Reliable

We’re based in Los Angeles and proudly serve Downey and nearby communities like Norwalk, Bellflower, Santa Fe Springs, and Pico Rivera. Beyond Los Angeles County, we cover Orange County, Ventura County, and Western Riverside County for multi‑site clients and special projects.

Get Your Free On‑Site Assessment

Need commercial exhaust fan installation, repair, or a compliance check in Downey? Contact #1 AC Guys for a free on‑site assessment and a clear, code‑ready plan. Experience the difference a fourth‑generation, family‑run HVAC team can make—healthier air, safer operations, and dependable performance year‑round.