Classification Information
Dampers, namely, control devices used in air ducts to regulate the flow of air; Fans for HVAC units; Ventilating exhaust fans; Ventilating fans for commercial and industrial use; Ventilating fans for industrial purposes; Ventilating louvers; Ventilating, high-velocity fixed exhaust fans for commercial and agricultural use; Ventilating, high-velocity portable exhaust fans for commercial and agricultural use; Ventilation fan accessories, namely, grilles; Ventilation hoods
Environmental Control Apparatus