Industrial Exhaust Fans

Specification: OSHA & NFPA Compliant

Fume hood exhaust, roof upblast ventilators, and high-velocity lab dispersion blowers.

Engineering Scope & Overview

Proper exhaust is critical for plant safety, chemical fume removal, and thermal relief. We service, balance, and install upblast roof exhausters, inline centrifugal fans, and corrosion-resistant fiberglass blowers across commercial and industrial facilities.

WMI Field Protocol & Certified Best Practices

• Dynamic on-site wheel balancing preventing roof deck vibration transmission
• Spark-resistant and explosion-proof motor compliance (AMCA Class A/B/C)
• Direct-drive EC motor upgrades eliminating belt maintenance
• Airflow velocity testing verifying OSHA and NFPA containment standards

Frequently Asked Questions

What causes severe vibration and roaring noise in rooftop exhaust fans?

Grease accumulation, worn pillow-block bearings, misaligned V-belts, or missing wheel balance weights cause high 1X unbalance vibration that transmits into the building roof structure.

What are spark-resistant fans and when are they legally required?

AMCA Type A, B, or C spark-resistant fans feature non-ferrous aluminum wheels and explosion-proof motors to prevent static sparks in environments exhausting flammable vapors, paints, or gases.

Do you offer direct-drive EC motor retrofits to replace worn belt-drive exhausters?

Yes. Upgrading to direct-drive electronically commutated (EC) motors eliminates belts, pulleys, and grease bearings, allowing dial-in speed adjustment and lowering maintenance costs.

Emergency Dispatch & RFP Inquiry

Contact Western Mechanical Inc. toll-free at (800) 585-5085 for commercial and industrial service across Southern California.