Osburn OB04002 - Manual (Page 85)

Stratford Fireplace Installation and Operation Manual
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APPENDIX 4: INSTALLING THE FRESH AIR INTAKE KIT
During operation, the fireplace requires fresh air for combustion and draws air out of the house. It
may starve other fuel burning appliances such as gas or oil furnaces. As well, exhaust fans may
compete for air, causing negative pressure in the house, resulting in smoke entering the house
from the fireplace. This situation is aggravated in modern airtight houses. To overcome this
problem, we strongly recommend that you bring fresh air to the fireplace. Check with local
authorities having jurisdiction in your area, it may be mandatory.
If more fresh air is needed (airtight house or conduit exceeding 10 ft or 3 m), two intakes may be
installed, providing twice the quantity of incoming fresh air; you may also increase both conduits
to 4 inches, with the use of a 3 to 4 inch adaptor, again increasing substantially the quantity of
incoming fresh air.
THE INSULATED FLEXIBLE PIPE LENGTH SHOULD BE SUFFICIENT AND HAVE A CONFIGURATION
TO AVOID CONDENSATION.
THE OUTSIDE WALL TERMINATION MUST NOT BE INSTALLED AT MORE THAN 50% OF THE TOTAL
HIGHT OF THE CHIMNEY AND AT THE MOST 10 FT. (3 M) ABOVE THE BASE OF THE FIREPLACE.
THE FRESH AIR MUST COME FROM OUTSIDE THE HOUSE. THE AIR INTAKE MUST NOT DRAW AIR
FROM THE ATTIC, FROM THE BASEMENT, OR FROM A GARAGE.
THE OUTSIDE WALL TERMINATION SHOULD BE INSTALLED WHERE IT IS NOT LIKELY TO BE
BLOCKED BY SNOW OR EXPOSED TO EXTREME WIND AND AWAY FROM AUTOMOBILE EXHAUST
FUMES, GAS METER AND OTHER VENTS.
The fresh air intake kit included with the fireplace contains the following components:
a. One (1) 3" adaptor;
b. One (1) air inlet block-off plate;
c. Six (6) screws;
d. One (1) 3” to 4” adaptor;
The following component is not included:
a. The outside air inlet cap;
b. The 2 adjustable straps.
c. A 3” or 4” insulated flexible pipe (This HVAC type pipe must comply to ULC S110 and/or UL
181, Class 0 or Class 1 Standards and must withstand temperatures up to 250 °F.