Quadra-Fire CUMBGAP-MBK Manuel D’Utilisation

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Page 6
November 5, 2010
Cumberland Gap Wood Stove
7006-188G
Marginal Location:
• Below peak
Location NOT recommended:
•  Not the highest point of the roof
• Wind loading possible
Multi-level Roofs
Windward 
Leeward
Recommended:
Outside Air Intake
on windward side
NOT recommended:
Outside Air Intake
on leeward side
Recommended Location:
• Above peak
Recommended:
• Insulated exterior chase 
in cooler climates
Recommended Location:
• Above peak
• Inside heated space
Location NOT recommended:
•  Too close to tree
• Below adjacent structure
• Lower roof line
•  Avoid outside wall
Marginal Location:
•  Wind loading possible
Figure 6.1
C.  Negative Pressure
Draft is the pressure difference needed to vent appliances 
successfully.  Considerations for successful draft include:
 
•  Preventing negative pressure
 
•  Location of appliance and chimney
Negative pressure results from the imbalance of air avail-
able for the stove to operate properly.  Causes for this imbal-
ance include:
 
•  Exhaust fans (kitchen, bath) etc.)
 • 
Range 
hoods
 
•  Combustion air requirements for furnaces, water 
heaters and other combustion appliances
 • 
Clothes 
dryers
 
•  Location of return-air vents to furnace or air condi-
tioning
 
•  Imbalances of HVAC air handling system
 
•  Upper level air leaks
  
• 
Recessed 
lighting
 
 
•  Attic hatch opening
  
• 
Duct 
leaks
To minimize the affects of negative air pressure the follow-
ing must be considered:
 
•  Install the outside air kit.  Install the intake on the 
side of the house towards prevailing winds during 
the heating season.
 
•  Ensure adequate outdoor air is supplied for combus-
tion appliances and exhaust equipment.
 
•  Ensure furnace and air conditioning return vents are 
not located in the immediate vicinity of the appliance,
 
•  Avoid installing the appliance near doors, walkways 
or small isolated spaces.
 
•  Recessed lighting should be of “sealed can” design; 
attic hatches weather stripped or sealed; and attic 
mounted ductwork and air handler joints and seams 
taped or sealed.
WARNING
•  Negative pressure can cause spillage of 
combustion fumes, soot and carbon mon-
oxide.
•  Appliance needs to draft properly for 
safety.
Asphyxiation Risk.