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The insulation allowed for this kind of installation must have an R-value in
between 3.5 and 6.5. The thickness of insulation needed will differ from an
insulation material to another.
WARNING
YOUR INSULATION INSTALLED ON THE DUCTWORK SHOULD NEVER BE
IN CONTACT WITH ANY COMBUSTIBLE MATERIAL. THE CLEARANCE
LISTED IN THE FIGURE ''REDUCED CLEARANCES OF INSULATED
DUCTWORK'' IS FROM THE TOP OF THE INSULATION.
N.B.: THE AIR RETURN DUCTS SHOULD BE AT LEAST EQUAL TO THE
COLD AIR PLENUM DIMENSIONS.
Figure 3.1.7 c - Hot air plenum minimal height.
The hot air plenum coming out of the furnace is to have a minimum height of 24"
(610 mm) if the top of the first vertical section is not flush with the first horizontal
section (see Figure 3.1.7 c). Otherwise, the minimum height is 10" (254 mm).
These dimensions for all hot air furnaces are in accordance with the standards
CSA B140.4, UL 391 and UL 727.
3.1.8 PIPE CONNECTOR AND DAMPER
The Mini-Caddy Add-on furnace must be connected to a duct system and a
chimney that are in good condition; the use of separate chimneys is
recommended.
If the furnace is connected to an oil furnace and both appliances must share the
same chimney, the chimney and smoke connector must be 7" in diameter and
approved for use with wood-burning appliances. The use of 6" connector and
chimney is permitted if the wood furnace evacuates into a separate chimney. It's
strictly forbidden to connect a solid fuel burning appliance to a chimney
deserving a propane or natural gas appliance. Regulation CAN-CSA-
B365.1.
DO NOT INSTALL A MANUAL DAMPER.
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