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Page 6 Heat & Glo • NorthStar EPA Fireplace • 480-1081C September 1, 2008 September 1, 2008
September 1, 2008
2 Getting Started
A. Design and Installation Considerations
Draftis the pressure difference needed to vent replaces
successfully.Considerationsforsuccessfuldraftinclude:
• Preventing negative pressure
• Locationofreplaceandchimney
B. Negative Pressure
Negative pressure results from the imbalance of air avail-
ablefor the replace to operate properly. Causes for this
imbalanceinclude:
• 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
conditioning.
• Imbalances of the HVAC air handling system.
Asphyxiation Risk
Negative pressure can cause spillage of
combustion fumes and soot. Fire needs to draft
properly for safe operation.
WARNING
Check building codes prior to installation.
• InstallationMUST comply with local, regional,
state and national codes and regulations.
• Consult insurance carrier, local building inspector,
reofcialsorauthoritieshavingjurisdictionabout
restrictions, installation inspection and permits.
CAUTION
Whenplanningareplaceinstallation,itisnecessarytode-
termine the following information beforeinstalling:
• Where the fireplace is to be installed. See Sections
3 and 4.
• Theventsystemcongurationtobeused.SeeSections
5 and 6.
• Electrical wiring. See Section 3.
• Framingandnishingdetails.SeeSections3,6and8.
• Whether optional accessories are desired. See
Section 12.
TheNorthStar Fireplace requires a minimum ue draft of
-0.10 inches of water column on High, and -0.04 inches of
watercolumnonLow,asmeasuredwithadraftmeter.Most
dealershavedraftmetersavailabletomeasureyouruedraft
if you suspect a problem.
Ifthereisdifculttostart,andsmokespillsoutofthedoor,
oryou nd it hard to establish and maintain a moderately
highburnrate, thentheue draftistoolow andcorrective
measures must be taken.
NOTE: Cold air inltration can cause frosting on glass.
• Upperlevel air leaks: recessed lighting, attic hatch
opening, duct leaks.
To minimize the effects of negative air pressure, the follow-
ingmustbeconsidered:
• Install the outside air kit.
• Ensure adequate outdoor air is supplied for combustion
appliances and exhaust equipment.
• Ensure furnace and air conditioning return vents are not
locatedintheimmediatevicinityofthereplace.
• Avoidinstallingthereplaceneardoors,walkwaysorsmall
isolated spaces.
• Recessed lighting should be a “sealed can” design; attic
hatches weather stripped or sealed; attic mounted duct
work and air handler joints and seams taped or sealed.
Locationofthereplaceandchimneywillaffectperformance.
AsshowninFigure7.1,onpage7,thechimneyshould:
• Be installed through the warm airspace enclosed by the
building envelope. This helps to produce more draft,
especiallyduringlightinganddie-downofthere.
• Penetrate the highest part of the roof. This minimizes the
effects of wind turbulence.
• Be located away from trees, adjacent structures, uneven
roof lines and other obstructions.
Offsetscanrestrictdraft sotheiruse shouldbeminimized.
Considerthe replace location relative to oor and ceiling
and attic joists.