1. Unit must be installed at floor level – approximately 3” off the floor.  
  2. Replenishment air must flow from upstairs into the basement or crawlspace. Open doors that can be closed are not a substitute for a properly installed vent.
  3. Unit should be installed as far away as possible from the source of replenishment air.
  4. Outside duct must be no less than 6” and dedicated for the Humidex unit only.
  5. Maximum circulation is required to draw in air from all parts of the basement.
  6. Unit should not be installed within 8 feet of combustion appliance.


IMPORTANT – What Not to Do

  1. DO NOT install the unit more than approx. 3 inches off the floor.
  2. DO NOT make more than one turn with the duct and the ductwork should not be longer than 3 feet in total, unless rigid ducting is used - see Ducting, Page 6.
  3. DO NOT crush the vinyl Pipe.
  4. DO NOT install the unit next to a replenishment air supply.