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18
6.5 INSTALLATION - FLUE REGULATIONS
A
G
E
B
C & D
K
F
F
L
N
O
P
H
J
Boundary
Boundary
F
Q
Q
Q
Q
Q
Q
Q
R
Clearances advised by BS 5410 Part 1: 2014
Regular Appliance (Open, Low Level Discharge and Balanced) Flue Termination Clearance
The basic requirement with regard to flue positioning is that no hazard or nuisance is caused by the flue gases.
Diagrams 20a and 20b show clearances advised by BS 5410 Part 1: 2014.
Regional requirements where flue clearances differ can be found in the
regional requirements section in OFTEC Book 3 2010
Pressure JetLocation
Appliance Burner Type
Condensing
A Directly below an opening, airbrick, opening window etc. 1000
B Horizontally to an opening, airbrick, opening window etc. 1000
C Below a gutter, eaves or balcony with protection 1000
D Below a gutter or a balcony without protection 1000
E From vertical sanitary pipe work 300
F From an internal or external corner or surface or boundary alongside the terminal 300
G Above ground or balcony level 300
H From a surface or a boundary facing the terminal 2500
J From a terminal facing the terminal 1200
K Vertically from a terminal on the same wall 1500
L Horizontally from a terminal on the same wall 750
M Above the highest point of an intersection with the roof 600
N From a vertical structure on the side of the terminal 750
O Above a vertical structure less than 750mm from the side of the terminal 600
P From a ridge terminal to a vertical structure on the roof 1500
Q Above or to the side of any opening on a flat or sloping roof 300
R Below any opening on a sloping roof 1000
Minimum distances to terminals in millimeters as measured from the top of the chimney
or the outer edge of where flue gases pass through low level discharge openings
SEE NEXT PAGE FOR IMPORTANT NOTES
Diagram 20a
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