5.5 INSTALLING INSULATED FLEXIBLE DUCTS
Use the following procedure for connecting the insulated flexible ducts to the Tandem® transition* (
EXHAUST AIR TO OUTSIDE
and
FRESH AIR FROM OUTSIDE
).
NOTE: If the joist are perpendicular to the ducts, or if the connection to the exterior hood is in a limited area, your installation will need
two exterior hoods instead of one. In this case, do not use the Tandem® transition. Identify each insulated duct. For fresh air from
outside duct, use the blue sticker dots (one dot at each end). For exhaust air to outside duct, use the red sticker dots (one dot at each
end). (No dots for HRV 2500 and HR 2.5 units.) Then, go to point 5.5.2 and refer to the optional single hood enclosed instructions.
*Patent pending.
5.5.1 C
ONNECTION TO TANDEM® TRANSITION
1. For each duc
t, pull back the insulation to expose the interior flexible duct.
2. Connect the interior flexible duct to the smaller part of the Tandem® transition (5’’ oval) using a tie wrap.
NOTE: If you are using a 6’’ diameter insulated duct, use the bigger part of the Tandem® transition (6’’ oval).
3. Pull the insulation over the joint. Pull the vapor barrier over the insulation.
4. Apply duct tape gently to the joint in order to make an air
tight seal. See figures below.
Identify each insulated duct. For fresh air from outside duct, use the blue sticker dots (one dot at each end). For exhaust air to outside
duct, use the red sticker dots (one dot at each end). Be careful to identify the exhaust air to outside duct (red dot) at the upper
section of the transition. (No dots for HRV 2500 and HR 2.5 units.)
5.5.2 C
ONNECTION TO THE 5’’ TO 6’’ OVAL PORTS OF THE UNIT
Use the following procedure for connecting the insulated flexible ducts to the 5’’ to 6’’ oval ports of the unit (
EXHAUST AIR TO OUTSIDE
and
FRESH AIR FROM OUTSIDE
).
1. Pull back the insulation to expose the flexible duct.
2. Connect the interior flexible duct to the smaller part of the port (5’’ oval) using a 24’’ tie wrap.
NOTE: If you are using a 6’’ diameter insulated duct, use the bigger part of the port (6’’ oval).
3. Pull the insulation over the joint and tuck it between the inner and outer rings of the port.
Pull the vapor barrier over the insulation and over the outer ring of the port.
5. INSTALL THE UNIT (CONT’D)
CAUTION
Make sure the vapor barrier on the insulated ducts does not tear during installation.
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