Instructions / Assembly
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Shingle Roofs:
12. If you have a shingle roof, insert the reciprocating saw sideways between the shingles and roof
decking. Starting at the 3 o’clock position of the vent hole, begin cutting in a sweeping motion
under the shingles, cutting through any roong nails or staples. Continue cutting counter-clockwise
around the vent hole until reaching the 9 o’clock position. Using a roong knife, cut a 4 inch
horizontal slit in the shingles at the 9 o’clock and 3 o’clock positions of the hole, allowing the fan’s
ashing to slide underneath the shingles.
13. Slide the fan unit underneath the shingles until the fan reaches the top of the hole. (See Figure 2.3G)
14. Lifting the fan unit up at an angle, apply weatherproof sealant to the bottom side of the fan unit.
This will help keep the fan in place and create a tight seal. (See Figure 2.3H)
15. Secure the fan ashing to the roof using a minimum of 8 roong nails. Finish applying weatherproof
sealant around the fan and nails and secure the shingles by re-nailing them into the roof. (See Figure
2.3I)
Now that you have completed the installation of the RM WHF-4.0 fan unit, it is now time to install your
chosen accessories.
Continue below for RM WHF-4.0-DB damper box, duct, and grille accessory installation
instructions.
Continue to page 9 for RM WHF-4.0-DG1 damper grille accessory installation instructions.
Continue to page 10 for RM WHF-4.0-DG2 damper grille accessory installation instructions.
Figure 2.3G Figure 2.3IFigure 2.3H
2.2 INSTALLING THE RM WHF-4.0-DB
Use the following instructions to nish the installation of your
accessory kit.
These instructions are for installing the RM WHF-4.0 with
damper box, duct, and grille
1. Using the duct clasp, connect the duct to your fan unit.