Specifications
Page 28 | 1-800-343-9463
PS 020713
Ducting the supply and return air to the cellar creates a virtually silent cellar space and also maximizes cellar capacity.
It is absolutely crucial to only use insulated duct work as it minimizes cooling loss, prevents sweating, and reduces
noise. Failure to use insulated ducting will cause the unit to run excessively and greatly shorten its lifespan.
Note: Do not exceed a total of 25 duct feet between the Evaporator Unit (Fan Coil Unit) and cellar vent, this means a
total of 50’ combined for both the supply and return lengths.
Avoid crimping the exible ducts. This chokes down the inside area and reduces the airow causing the unit to lose
eciency. Be sure all ducts and surfaces in contact with the airow are insulated and have a vapor barrier on the
outside.
Un-insulated ducts and surfaces cause bare, exposed metal surfaces to sweat, further degrading the insulation
and equipment cooling capacity.
General Duct Recommendations:
• Provide support for the exible duct to prevent sags and bends
• Stretch out the duct to make a smoother interior, which reduces air resistance
• For 90° bends, use a 90° adjustable elbow (Ell)
• Do not squeeze or reduce the inside diameter of the ducts, which reduces airow
• Use short and straight duct work where possible
• Remove the grilles and panels from the openings to connect the duct work
• Check that all fan blades move freely
• Keep air paths free of loose foreign objects and debris
• Connect the round exible ducts to the WhisperKOOL system using the duct collars provided with the duct
accessory kit
• Pull the outer plastic wrapping and insulation away from the end of the duct to expose the reinforced inside
duct liner
• Fasten the duct collar using tie straps or clamps around the inside liner
• Secure the duct collar to the unit using the screws provided. Take care to not damage or bend the gasket
• Use approved duct tape to seal all joints
Do not clamp around the outside insulation,
as it will compress and loosen over time.
Note: When performing a ducted installation, it is crucial
to not forget about routing the bottle probe into the cellar.
The system must have the sensing bottle in the cellar to
maintain the cellar environment.
FULLY DUCTED INSTALLATION INFORMATION