The 4100 series is factory configured for a left-to-right or right-to-left airflow. In either airflow direction, the holes directly above the air outlet on the right side of the system MUST be contained within the ducting.
If a down flow configuration is desired, a down flow kit must be ordered from the factory and the system MUST be raised a minimum of 10" of the ground. An 18" stand is available to elevate the Comfort Plus.
If the Comfort Plus system is installed in a small enclosed area (less than 400 square feet), a minimum of a 24"x 24" opening must be installed into the area where the system is located. In addition, a 6" x 6" non-closing type register must be cut into the return air duct. Refer to the Placement and Clearance Requirements section for more information.
NOTE: When interfacing with a heat pump, the A-Coil MUST be placed on the return air side.