Quadra-Fire CASTILE-CE-MBK 7068-112 Manuel D’Utilisation

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August 19, 2011

Page 23

7068-112

Vent Configurations
To reduce probability of reverse drafting during shut-down

conditions Hearth & Home Technologies strongly recom-

mends:

 •   Installing the pellet vent with a minimum vertical run

of 1.52m. Preferably terminating above the roof line.

 •   Installing the outside air kit at least 1.22m below the

vent termination.

To prevent soot damage to exterior walls of the house and

to prevent re-entry of soot or ash into the house:

 •   Maintain specified clearances to windows, doors and

air inlets, including air conditioners.

 •   Vents should not be placed below ventilated soffits.

Run the vent above the roof.

 •   Avoid venting into alcove locations.
 •   Vents should not terminate under overhangs, decks

or onto covered porches.

 •   Maintain minimum clearance of 152mm from the vent

termination to the exterior wall. If you see deposits

developing on the wall, you may need to extend this

distance to accommodate your installation conditions.

Negative pressure results from the imbalance of air avail-

able for the appliance to operate properly. It can be stron-

gest in lower levels of the house.
Causes 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 conditioning
•  Imbalances of the heating/cooling air handling system
•  Upper level air leaks such as:
 -  Recessed lighting
 -  Attic hatch
 -  Duct leaks

To minimize the effects of negative air pressure:
•  Install the outside air kit with the intake facing prevailing

winds during the heating season

•  Ensure adequate outdoor air for all combustion 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 a “sealed can” design
•  Attic hatches weather stripped or sealed
•  Attic mounted duct work and air handler joints and seams

taped or sealed

On nominal heat output the combustion blower operates at

2053 rpm developing 0.33 m^3/s. This is the minimum require-

ment for the supply of combustion air.

Draft is the pressure difference needed to vent appliances

successfully. When an appliance is drafting successfully, all

combustion  byproducts  are  exiting  the  home  through  the

chimney.
Install through the warm airspace enclosed by the building

envelope. This helps to produce more draft, especially dur-

ing lighting and die-down of the fire.
Considerations for successful draft include:
•  Preventing negative pressure
•  Location of appliance and chimney
To measure the draft or negative pressure on your appliance

use  a  magnahelic  or  a  digital  pressure  gauge  capable  of

reading 0 - .13mm of water column (W.C.).
The  appliance  should  be  running  on  high  for  at  least  15

minutes for the test.
With the stove running on high you should have a negative

pressure equal to or greater than the number given in the

chart below. If you have a lower reading than you find on the

chart, your appliance does not have adequate draft to burn

the fuel properly.