Initial Installation
QUALIFIED INSTALLERS ONLY
Figure 34:
Figure 33: Use of Wall Straps.
Cathedral Ceiling Installation:
1.Follow installation steps 1 & 2 under Initial
Installation - Vertical Installation.
2.Using the plumb bob, mark the centerline of the venting system on the ceiling and drill a small hole through the ceiling and roof at this point. From the roof, locate the drill hole and mark the outline of the “Cathedral Ceiling Support Box”.
3.Remove shingles or other roof coverings as necessary to cut the rectangular hole for the “Support Box”. Cut the hole ⅛” larger than the “Support Box” outline.
4.Lower the “Support Box” through the hole in the roof until the bottom of the “Support Box” protrudes at least 2 inches (5 cm) below the ceiling. Align the “Support Box” both vertically and horizontally with a level as shown in Figure 35. Temporarily tack the “Support Box” in the place through the inside walls and into the roof sheathing.
Figure 35: Cathedral Ceiling Support Box Leveling.
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