ALUMINUM BLADES ARE ENCLOSED IN A STURDY STEEL SPIRAL WIRE GUARD.
EXHAUST VENTILATION FAN WITH SHUTTER 24" SINGLE SPEED WITH HARDWARE - 294497 GUARDED EXHAUST FANS FEATURE 120V, SINGLE-PHASE TOTALLY PERMANENTLY LUBRICATED MOTORS WITH PROVISIONS FOR DIRECT WIRING. NOTE: ROUGH-IN HOLE SIZE IS 1/2 INCH (+/- 5/16) LARGER THAN FAN BLADE SIZE.