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DUCTED INSTALLATION
Use ductwork to connect the unit to the supply and return outlets in the wine cellar. Use only insulated duct-
work to minimize cooling losses, prevent sweating, and reduce noise.
Use ductwork on the condenser section to redirect or absorb sound, bring in outside air to the unit inlet, and/or
exhaust the hot air.
Note: Do not exceed a total of 25’ for each length of ductwork run and 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
operate erratically.
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.
• 4000 Extreme: Duct Size 8”
• 8000 Extreme: 8” Supply and 10” Return
• Stretch out the duct to make a smoother interior, which reduces air resistance.
• Maximum duct length is 25ft.
• For 90° bends, use a 90° adjustable elbow (Ell).
• No more than two 90° bends on each duct. Recommend sweep 90° bends rather than sharp 90°.
• Do not squeeze or reduce the inside diameter of the ducts, which reduces airow.
• Use short and straight ductwork where possible.
• Remove the grilles and panels from the openings to connect the ductwork.
• 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 unit 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.
Cold Air to/from Wine Cellar
• Remove the supply air grille to install ductwork between WhisperKOOL unit and the cellar.
• Connect the supply air ductwork from the cellar to the supply air outlet adapter ange at the
WhisperKOOL unit.
• Connect the return air ductwork from the cellar to the return air inlet adapter ange at the
WhisperKOOL unit.
Warm Air to/from Exhaust Area
• Connect ductwork on the condenser to direct heat and air noise away from occupants.
• Connect ductwork to another space within the basement or out of the building if exhausted heat is
undesirable.