Troxler NTO 3–7
3. INST
LLATION
18" MIN
EXTERI
R WALL
GALVANIZED METAL
THIMBLE
16" DIA MIN OPENING FOR COMBUSTIBLE WALL MATERIAL
8" DIA MIN OPENING FOR NON-COMBUSTIBLE WALL MATERIAL
4" DIA. GALVANIZED METAL DUCT, ELBOW AND CAP
(NO COMPONENT SHALL HAVE A DAMPER)
18" MAX
POINT OF
EXHAUST
SEE NOTE
4" FLEXIBLE METAL DUCT W/ CLAMP
15' LONG MAX (SUPPLIED BY TROXLER)
NOTES:
1. Seal all joints between wall and thimble and between thimble
and duct with a high-temperature caulk.
2. The minimum thickness of all galvanized metal parts is 28
gauge, or that which is called for in local building codes,
whichever is thicker.
3. The overall length of all ducts should not exceed 4.6 m (15 ft)
from the top of the oven to the point of exhaust.
4. No component shall have a damper, screen, louver, or other
such device that may become clogged with soot over time.
5. Do not locate exhaust point near air intakes for building. Refer
to local building codes and/or a licensed HVAC contractor for
recommended/required distance.
6. Refer to local building codes and/or a licensed HVAC contractor
for more details.
Figure 3–2. Exterior Wall Penetration
Using a Metal Elbow and Cap
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