Offset Chimney Installation - HearthStone WFP-75 Owner's Manual

3.3 OFFSET CHIMNEY INSTALLATION

The minimum system height when using elbows is:
Fireplace model
Chimney model
Vertical installation
Two (2) elbows
Four (4) elbows
After reaching the location requiring the elbow, proceed as follows:
1. Install the first elbow; turn it in the required direction. Secure it to the chimney
according to the chimney manufacturer's instructions. In many cases, it is
recommended to secure connections with three (3) ½" (12 mm) metal screws.
2. Install the necessary chimney lengths to achieve the required offset. Lock the
chimney lengths together according to the chimney manufacturer's instructions.
In many cases, it is recommended to use three (3) ½" (12 mm) screws. If
the offset length is made of two (2) chimney lengths or more, many chimney
manufacturers may require that you use an offset or roof support halfway up the
offset. If penetrating a wall, install a wall radiation shield supplied by the chimney
manufacturer (see figures 46 & 47).
3. Use another elbow to turn the chimney vertically. Secure the elbow.
4. Use a plumb bob to line up the center of the hole. Cut a hole for the chimney in the
ceiling/floor. Frame this hole as described previously.
5. From below, install a firestop supplied by the chimney manufacturer (see figure 44).
6. A support must be used on the first 15' section (4.6 m).
7. Continue with the regular installation.
Hearthstone Quality Home Heating Products, Inc ®
WFP-75
All models
15 ft. (4.6 m)
15 ft. (4.6 m)
17 ft. (5.2 m)
Table 1
41 WFP-75 Model 8410