Install the fan If the duct is a standard size, remove the register and drop the fan into the boot. Secure it to the floor on each side with screws. If the duct is smaller than standard, see ...

To fully understand how to install a high-velocity HVAC system, one must know what it is and what it does. This article provides some background and the key steps to a successful installation.

Insert the vent and screw the cap to the house (predrill screw holes).