18 In. Heavy Duty Exhaust Fan, High Performance Totally Enclosed Motor gable fan of net free area per

of net free area per vent to efficiently release trapped heat and moisture from your attic space

and can be folded and put away in a drawer in your home or office until fall and winter roll around again

Requires 10 - 12 sq

Efficient attic ventilation delivers 51 sq

18 In. Heavy Duty Exhaust Fan, High Performance Totally Enclosed Motor gable fan of net free area perProvides ventilation by moving air up to 3,000 CFM Fully assembled with plug in design Uses a rough opening of 20. 75" x 20. 75" Reinforced rust resistant galvanized steel housing with removable interior grille Pre drilled holes on flange and rolled flange edges for safe and easy installation Automatic shutter with added louver stiffeners prevents drafts from entering through the external opening OSHA compliant grille and totally enclosed, energy