Nature's Comfort NC-40 Owner's Manual - page 10
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DO NOT INSTALL A FLUE DAMPER IN THE EXHAUST VENTING SYSTEM OF THIS UNIT.
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING ANOTHER APPLIANCE.
NOTE: WHERE PASSAGE THROUGH A WALL OR PARTITION OF COMBUSTIBLE CONSTRUCTION IS
DESIRED THE INSTALLATION SHALL CONFORM TO CANADA /CSA-B365.
HORIZONTAL EXHAUST VENT INSTALLATION (See figures on next page)
1. Place your appliance in a location which meets the requirements of this manual and where it does not
interfere with the house framing, wiring, etc. Note: The stove cannot be used without foot screws installed for
maintaining a 1” gap from the floor to the bottom of the stove base. This is required to keep temperatures cool
enough underneath the unit.
2. Install the non-combustible hearth pad. Temporarily place the stove approximately 15” (381 mm) away
from the interior wall.
3. Locate the center of the exhaust pipe of your unit. This point should then be extended to the interior wall
of your house. Once you have located the center point on the interior wall, cut the appropriate sized hole
through the wall for thimble being used.
4. Install wall thimble. Refer to the instructions which come with the wall thimble purchased.
5. Install the appropriate length of exhaust vent pipe into the wall thimble. Consider step 11 when
determining the correct length of exhaust vent to purchase.
6. Install an optional combustion air intake pipe. Be sure that the outside air intake vent has a proper cap on
it to prevent rodents from entering; also be sure it is installed where it won’t become blocked with snow, etc.
7. Connect the exhaust vent pipe to the exhaust outlet of your appliance.
8. Secure all vent joint connections with 3 screws. Seal the exhaust vent joint connections with high
temperature silicone sealant.
9. Push the unit straight back to the interior wall but make sure to maintain the minimum clearances to
combustibles – 7.5” (152 mm) to the back of the unit. Seal the annular space of the wall thimble and around
the vent pipe with high temperature silicone sealant.
10. The exhaust vent pipe must extend at least 12” (300 mm) out past the exterior wall. Seal the annular
space of the wall thimble and around the vent pipe with high temperature silicone sealant.
11. Install a listed horizontal termination cap or if necessary install a 90° elbow and appropriate length of
vertical venting. A listed vertical vent cap is recommended however (if local codes allow) when the vent
terminates several feet above ground level and there are no trees, plants, etc. within several feet, a 90° and
45° elbow can be used as a termination. The 45° elbow must be turned down to prevent rain from entering.