Hearth & Home Technologies 5100I-GD-B ユーザーズマニュアル

Page 6

September 1, 2008

R 

438-0380D

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 fireplace to operate properly.  Causes for this 

imbalance 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

Recommended 

Location

Marginal

Location

Location

Not

Recommended

 

Recommended

Location

 

Location NOT 

Recommended

Multi-level Roofs

Windward

Leeward

Outside Termination Cap

 •  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-

Asphyxiation Risk.
•  Negative pressure can cause spillage of

combustion fumes and soot

•  Appliance needs to draft properly for

safety.

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.