The Vent Kits are a complete package with the parts necessary to complete the installation of your fan. There are various kits available depending on your preferred installation configuration. Single Bathroom Kit This kit is for venting one bathroom and contains an inline fan, quiet grille, backdraft damper and tie wraps. Dual Bathroom Kit This kit is for venting two bathrooms and contains an inline fan, two quiet grilles, two backdraft dampers, one Y-connector and tie wraps.
HVI (Home Ventilating Institute) guidelines state that baths 100 sq. feet or smaller require one CFM per square foot of bathroom. Multiply the length of the bathroom by the width to achive the square foot. The minimum CFM required is 50 CFM.
Bathrooms Over 100 SQ. Feet
Calculating baths over 100 sq. feet requires taking into account the amount of fixtures present. Each toilet, shower or tub = 50 CFM Whirlpool and jetted tubs = 100 CFM
Add the results together in order to find the fans required CFM.