- Sizes: Model HD/HC: 12" through 60" direct drive. Model HB: 12" through 72" belt drive.
- Model Designations: HDE, HCE, HBE - exhaust. HDS, HCS, HBS - supply. HDR, HCR, HBR - reversible.
- Construction: Fiberglass, Hetron 99P ® polyester resin, Class 1 flame spread of 25 or less with UV inhibitor. Standard color is gray.
- Stack: Figerglass construction. Synthetic veil provides smooth interior for efficient air flow and creates a resin-rich, impenetrable surface to most airstream corrosives.
- Venturi: Fan wheel operates in a fiberglass venturi orifice molded into the stack, increasing air flow efficiency.
- Fan Propeller: Highly efficient, air foil and helical shaped fiberglass reinforced blades attached to a fiberglass hub. Bushing protected by a removable cap for easy maintenance.
- Curb Cap: Fiberglass construction, integrally formed to fan housing. Size can be adapted to fit existing curbs.
- Hood: Fiberglass construction, properly sized as to minimize restriction to air flow and prevent water entrainment on supply applications. All structural support members are solid fiberglass.
- Drive Tube: Fiberglass construction including bearing mounts. Sealed with a neoprene shaft seal.
- Bearings: Heavy duty, cast iron, pillow block-type with regreasable fittings.
- Shaft: 304 stainless steel.
- Motor: NEMA Design B, heavy duty, industrial continuous duty, totally enclosed with sealed ball bearings. Severe duty motors are standard on direct drive units with the motor in the airstream.
- Motor Mount: Fiberglass construction, adjustable for belt tensioning.
- Lube Lines: Polyethylene, extended from bearings to the exterior of the unit.
- Motor Cover: Fiberglass construction.
