DUCTWORK INSTALLATION GUIDELINES
❑For safety reasons, ducting should vent directly outdoors (not into an attic, underneath the house, into the garage or into any enclosed space).
❑Keep duct runs as short and straight as possible.
❑Duct fittings (elbows and transitions) reduce air flow efficiency.
❑Back to back elbows and ”S” turns give very poor delivery and are not recommended.
❑A short straight length of duct at the inlet of the remote blower gives the best delivery.
❑Transition to duct from the integral blo- wer or remote duct transition as close to the downdraft as is possible. In order of preference, use
1st. 10” round duct 2nd. 8” round duct 3rd.
❑The use of flexible metal round duct should only be used when no other duct fitting exists. Limit use to short lengths and do not crush when making corners.
DUCTWORK INSTALLATION GUIDELINES
❑Where local codes permit, plastic pipe
❑Use only duct work constructed of materials that are acceptable by the applicable codes. All duct should be
26 gauge or heavier to minimize flex due to air flow.
❑The remote blowers requires a 10” or 8” diameter round duct (depending on model) to match the inlet ring. A transition is necessyary from other duct sizes.
❑Use sheet metal screws as required to support the duct weight, and seal all joints with duct tape.
❑Be certain that the duct work does not interfere with floor joists or wall studs.
❑Do not exhaust more than one vent into a single duct run.
❑Thermal breaks, such as a short section of nonmetallic duct, should be used in areas of extreme cold.
❑Always use an appropriate roof or
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