6
Minimum distances for terminal
positions shown in the table are
from slot openings.
Dimension
Terminal Position
Minimum
Distance
A
Directly below an opening, air brick, windows, etc.
300mm
B
Below gutters, soil pipes or drain pipes
75mm
C
Below eaves
200mm
D
Below balconies or car port roof
200mm
E
From a vertical drain pipe or soil pipe
75mm
F
From an internal or external corner
200mm
G
Above ground, roof or balcony level
300mm
H
From a surface facing the terminal
600mm
I
From a terminal facing the terminal
1200mm
J
From an opening in a car port (e.g. door, window) into dwelling
1200mm
K
Vertically from a terminal on the same wall
1500mm
L
Horizontally from a terminal on the same wall
300mm
-
Projection outwards from wall
55mm
Fig. 2 Allowable Terminal Positions
A fan-powered flue system tends to depressurise the room containing the appliance.
Normally no additional ventilation should be required. In exceptional circumstances,
however the spillage check (See further on in this guide) may indicate a need for further
ventilation in order to ensure that there is adequate air replacement. If necessary seek
expert advice.
In the Republic of Ireland (IE), permanent ventilation must comply with the rules
currently in force.
The flue terminal should be located so that the wind can blow freely across it at all times
and where any blockage due to leaves, snow, etc. is unlikely. The minimum allowable
distances from the terminal are shown in figure 2 and the table.
Note: The distances are from the edge of the vertical exit slots in the terminal
not from the edges of
the rectangular box (See figure 2).