Firebird Condensing Boiler
4
15
4.3 - VENT REQUIREMENTS
Minimum distances to terminals in inches as measured from top of the chimney
or the rim of a low level discharge opening.
APPLIANCE BURNER TYPE DIRECT VENT
A. Directly below an opening, air vent, opening window etc 48”
B. Horizontally to an opening, air vent, opening window etc 48”
C. Below a gutter or eaves 36”
D. Above door, window, or gravity inlet 12”
E. From vertical sanitary pipework 12”
F. From an internal or external corner or surface or boundary alongside the terminal 36”
G. Above ground or expected snow level 12”
H. From a surface or boundary facing the terminal 60”
J. From a terminal facing the terminal 60”
K. Vertically from a terminal on the same wall 60”
L. Horizontally from a terminal on the same wall 40”
M. Above the highest point of an intersection with the roof 36”
N. Above a vertical structure less than 120” from the side of the terminal 24”
O. From a ridge terminal to a vertical structure on the roof 60”
Recommended clearances for Open Flues,
and Balanced Flues fitted to Oil Fired Boilers.
These notes form an integral part of the information shown above.
1. Terminals should be positioned so as to avoid products of combustion accumulating in stagnant pockets
around the building or entering into buildings.
2. Vertical structure in N and O include tank or lift rooms, parapets, dormers etc.
3. Terminating positions A to L are only permitted for appliances that have been approved for side wall flue
discharge.
4. Terminating positions must be at least 6 ft distant from an oil storage tank unless a wall with at least
30 mins fire resistance and extending 18” higher and wider than the tank is provided between the tank
and the terminating position.
5. Where a flue is terminated less than 36” away from a projection above it and the projection consists
of plastic or has a combustible or painted surface, then a heat shield of at least 36” wide should be
fitted to protect these surfaces.
6. The terminal must be 7 ft above the ground, deck, flat roof or other place to
which any person has access, the terminal must be protected by a guard.
7. Notwithstanding the dimensions given in the drawing and table, a terminal should not be sited closer
than 24” to combustible material.
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