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7.6.4 Offset chimney installation
After reaching the location requiring the elbow, proceed as follows:
1. To insure a good draft, it is recommended, to have a length of 18 inches (457 mm) from the top of the
unit to the first offset. 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.
3. Use another elbow to turn the chimney vertically. Secure the elbow.
4. Use a plumb bob to line up the centre 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 preceding figure).
6. A support must be used on the first 15' section (4.6 m).
7. Continue with the regular installation.
• IN EVERY CASE, THE CHIMNEY MUST START WITH AN 8''
DIAMETER ANCHOR PLATE SECURED TO THE FIREPLACE. (SOLD
SEPARATELY).
• IF THE MALE NOZZLE (A) OF THE ANCHOR PLATE EXCEEDS 2" (51
MM) IN LENGTH (SEE IMAGE BELOW), IT SHALL BE CUT ABOVE
THE LIFTING HOOKS WELDED TO THE INSIDE OF THE FLUE
OUTLET SO THAT THE ANCHOR PLATE RESTS PERFECTLY ON TOP
OF THE FIREPLACE.
HORIZON – Installation and Operation Manual
TABLE 2 : MINIMUM SYSTEM HEIGHT WHEN USING OFFSETS
Fireplace model
Chimney model
Vertical installation
Two (2) offsets
Four (4) offsets
HORIZON
All models (see TABLE 3)
15 ft. (4.6 m)
15 ft. (4.6 m)
17 ft. (5.2 m)
WARNING
55
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