Trueheat TH36 - Double Offset Installation Criteria

ROOF JOIST SHIELDS FOR TH42
FIREPLACES AND ALL TRUEHEAT®
DOUBLE OFFSET INSTALLATIONS
Whenever two-30° offsets (4-30° elbows) are
employed, the following installation criteria must
be followed.
1. The minimum installation height (fireplace
and chimney) must be 21 ft. The maximum
overall height must not exceed 79 ft.
(fireplace and chimney).
2. The maximum offset distance for each off
set is 8 ft. Therefore the total offset distance
for 2 offsets is 16 ft. Two elbows may be con
nected to one another in order to create a
4 inch offset. See FIG. 13.
3. A minimum of 4 ft. of vertical chimney must
be installed between each offset. See FIG.
13.
4. For TH36 and TH28, whenever two-30° OFF
SETS ARE EMPLOYED, TRUEHEAT® MODEL
RJ8 ROOF JOIST SHIELDS MUST BE IN
STALLED. The model RJ roof joist shields
must be installed at the roof joist level as
shown in FIG. 14. ForTH42 models, the mod
el RJ roof joist shields must be used for all
installations. Roof joist shields must be in
stalled in accordance with FIG. 14.
If these installation guidelines are not followed,
you will void your TRUEHEAT® warranty and may
create a fire hazard.
MINIMUM OFFSET
OF 4 INCHES
MIN. 4 FT.
BETWEEN
OFFSETS
FIG 13
DOUBLE OFFSET INSTALLATION CRITERIA
MINIMUM
4 FT. BETWEEN
OFFSETS
.MAXIMUM TOTAL.
OFFSET OF 16 FT.
FIG. 14
Nail roof Joist shields to each side of the roof with two nails on each of the four sides.
ROOF JOIST
SHIELDS NAILED
TO CROSS
MEMBERS
NOTE: Roof Joist shields are required for all TH42 Installations.
NOTE: When Installing the chimney In a chase or steep pitch roof, the roof joist shields must still be used.
Center each shield In the roof Joist directly perpendicular to the chimney center.
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