If the existing system has multiple returns, select one to disconnect from the existing forced air system and use it for the dedicated DRYCOOL™ HD return. Always select a return from a central location in the structure in an area that is always open to the rest of the structure. 

Do not use a return from a room that often may have its door closed. If the structure in which the unit is to be installed has an existing forced air HVAC system, utilize the HVAC system to make the DRYCOOL™ HD unit installation easier.

Attic Installation.

ALWAYS install a secondary catch pan with a drain or float interrupt for condensate under the DRYCOOL™ HD in an attic.

Locate a separate return for the unit in a central area of the structure or draw air from return ductwork. Duct the supply side of the unit to the air supply of the existing HVAC system. Connect 8" ducts to the reactivation inlet and outlet to supply ambient air for reactivation and to expel moist air outside the attic.

One of the benefits of a DRYCOOL™ HD is the delivery of dehumidified air to the space at approximately the same temperature that enters the device. This allows an owner to simplify the installation for applications or instances where it is desired to maintain humidity levels in one open space. In these applications the return air from the space is connected directly to the unit and the dehumidified air can be delivered directly back into the room without the need to mix it with cold air coming from a central air conditioning system.