Model 200DX
::
Ultimateair.com
::
Athens, Ohio 45701 :: 740.594.2277
Making a Noisy Duct System Quiet
1.
Run at the lowest flow setting necessary for fresh air requirements.
2.
When installing the unit, allow for a three-foot section of insulated
flexible duct to go from the starting collar on the unit to the rest of
the ductwork (on all four collars).
3.
Locate the unit farther away from the source of the noise pollution
area (if the unit is close to a living room vent where the noise is too
loud) This will allow the noise to dissipate in the longer duct length.
Tools to install non-metallic flexible duct:
Knife or Scissors/Wire Cutter
: Use knife or scissors to cut duct
wall. Use wire cutters to cut the spiral wire helix.
Foil Tape
: Use only tapes that have been listed and labeled to
Standard UL 181B and labeled “181B-FX”. Use two wraps of 1½”
minimum width.
Draw Band/Plastic Clamp/Clamp Tool
: Use for low-pressure
systems up to four-inch wg (diameters of three to 10’) and up to
two-inch wg (diameters of 12” and over). To achieve proper
tensioning of clamp, set clamp to max tension setting.
•
Support hardware (e.g., couplings, and fittings) independently of
flexible duct using elbows or other devices.
•
Repair damaged vapor barrier jacket. If internal core is
penetrated, replace or splice flexible duct.
•
Install duct fully extended along straightest path possible.
•
Flexible duct shall be supported at manufacturer’s recommended
intervals, but at no greater distance than five feet, and the
maximum permissible sag is ½” per foot of spacing between
supports.
•
In no case will the hanger or saddle material supporting the
flexible duct be less than 1½” wide.
