Quietcool QC CL-6000 Classic Advanced Whole House Fan - Up To 5665 CFM - Two Speed - Covers Up To 2,833 SQFT - 10 Year Warranty - Removable Grille -

Canarm SD Wall Exhaust Fan 8 Inch - Direct Drive, 2 Speed, 360 CFM

Canarm 14 Inch Direct Drive Single Speed Standard Exhaust Fan 2,170 CFM 115V

Quietcool QC CL-2250 Classic Advanced Whole House Fan - Up To 2465 CFM - Two Speed - Covers Up To 1,233 SQFT - 10 Year Warranty - Removable Grille -

Canarm 10 Inch Panel Mounted Direct Drive Two Speed Exhaust Fan 690/580 CFM 115V

Fantech FIT 70E Ceiling-Mounted Energy Recovery Ventilator