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7039-131H
May 5, 2011
R
2100 Millennium Wood Stove (ACC)
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following
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 appli-
ance,
• 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com-
bustionfumes,sootandcarbonmonoxide.
• Applianceneedstodraftproperlyforsafety.
Asphyxiation Risk.