Specifications
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DUCTING OVERVIEW
Use of Ductwork
Use ductwork to connect the Exhaust Collar on the top of the cooling unit to the desired exhaust area. Use only
insulated ductwork to minimize cooling losses and reduce noise.
Note: Do not exceed a total of 15’ for the length of ductwork.
Avoid crimping the exible ducts. This chokes down the inside area and reduces the airow causing the unit to
operate improperly. Be sure all duct work is insulated.
General Duct Recommendations
• Use a 6”x14” duct boot to connect to the Exhaust Collar (when using standard duct work).
• Provide support for the exible duct to prevent sags and bends.
• Ultimate FM 8000 Duct Size: 8” dia.
• Stretch out the duct to make a smoother interior which reduces air resistance.
• Maximum duct length is 15’.
• For 90° bends, use a 90° adjustable elbow.
• No more than two 90° bends. Sweep 90° bends are recommended rather than sharp 90° bends.
• Generously apply duct sealant to all metal seams to ll in gaps that can leak air. Allow sealant to dry until rm
to the touch before applying berglass insulation.
• Do not squeeze or reduce the inside diameter of the ducts as this will reduce airow.
• Use short and straight ductwork where possible.
• Check that all fan blades move freely.
• Keep air paths free of loose foreign objects and debris.
Do not: Locate the Exhaust where it will be blocked for any reason.
DO NOT ALLOW FLEXIBLE DUCTING TO GET SQUEEZED OR ALLOW THE INSIDE
DIAMETER TO DECREASE DUE TO VERY SHARP TURNS.