This  AF-18 Whole House Fan solution uses your attic space as a plenum ! So if you have a very shallow-low clearance attic or if your attic has a lot of clearance this fan will provide a lot of through put !This cooling solution will act as an attic fan when the plenum opening is closed and a whole house fan when the plenum is open.

This  AF-20 Whole House Fan solution uses your attic space as a plenum ! So if you have a very shallow-low clearance attic or if your attic has a lot of clearance this fan will provide a lot of through put !This cooling solution will act as an attic fan when the plenum opening is closed and a whole house fan when the plenum is open.

This AF-24  Whole House Fan solution uses your attic space as a plenum ! So if you have a very shallow-low clearance attic or if your attic has a lot of clearance this fan will provide a lot of through put !This cooling solution will act as an attic fan when the plenum opening is closed and a whole house fan when the plenum is open.

This AF-30  Whole House Fan solution uses your attic space as a plenum ! So if you have a very shallow-low clearance attic or if your attic has a lot of clearance this fan will provide a lot of through put !This cooling solution will act as an attic fan when the plenum opening is closed and a whole house fan when the plenum is open.

16" x 16" Ceiling Grille Cover This unobtrusive and easy to install white grille cover allows for maximum ventilation with minimum fuss. Accessories like these can help you take full advantage of the flexibility and power of Roof mounted Fan systems. Outside Dimensions: 16" x 16" Inside Dimensions: 14" x 14"

16" x 20" Ceiling Grille Cover This unobtrusive and easy to install white grille cover allows for maximum ventilation with minimum fuss. Accessories like these can help you take full advantage of the flexibility and power of Roof mounted Fan systems. Outside Dimensions: 16" x 20" Inside Dimensions: 14" x 18"

16" x 30" Ceiling Grille Cover This unobtrusive and easy to install white grille cover allows for maximum ventilation with minimum fuss. Accessories like these can help you take full advantage of the flexibility and power of Roof mounted Fan systems. Outside Dimensions: 16" x 30" Inside Dimensions: 14" x 28"

16" x 38" Ceiling Grille CoverThis unobtrusive and easy to install white grille cover allows for maximum ventilation with minimum fuss. Accessories like these can help you take full advantage of the flexibility and power of Roof mounted Fan systems. Outside Dimensions: 16" x 38" Inside Dimensions: 14" x 36"

Grille and Damper Kit for roof mounted fan units. Fits between a 16 or 24 inch on center ceiling joists. (16x16)