Humidex® Basement, Crawlspace, and Whole Home units must be installed in the lower level of a home with a passive air register in the door to the basement or in the floor (when there is no open stairwell), to allow for fresh, drier, and warmer replenishment air to enter the basement or crawlspace, while the Humidex® ventilation system is expelling the moist air. 

Generally, the Humidex® system should be installed no more than 3" off the floor.  Additional information can be found in the installation manual of the unit.  

We recommend that your unit be installed by a knowledgeable professional. Proper installation is important to receive maximum results.