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MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 08456 448802 Fax 08456 448803 Email
Web www.mhgheating.co.uk
010711
10.7 Balanced Flue Terminal Positions For Boilers Below and Above 70kW Net Input.
(All measurements are in mm and are minimum clearances.)
Terminal Location
Boilers with a rated Input < 70kW Net
Boilers with a rated Input > 70kW Net
A
*Below and opening window etc.
300
600
B
Below gutter soil pipes etc.
75
700
C
Below Eaves.
200
200
D
*Below balconies or car port
roof.
200 N/A
E
From vertical drain or soil pipe
etc.
150 150
F
From internal or external corners.
300
300
G
Above ground or balcony level.
300
300
(2000 where people have general
access)
H
From a surface facing the
terminal.
2000 2000
I
From a terminal facing the
terminal.
2000 2000
J
*From opening in a carport into a
dwelling.
1200 N/A
K
Vertically from a terminal on the
same wall.
1500 1500
L
Horizontally from a terminal on
the same wall.
300 600
M
Above an opening, window etc.
500
600
N
*Horizontally to an opening,
window etc.
300 600
P
Above a level roof (base of
terminal.)
500 500
Q
From an adjacent wall (edge of
terminal.)
500 500
R
From adjacent opening, window
etc.
1000 1000
S
From any other flue terminal.
600
600
* Positions not recommended.
Groups of appliances of 150kW gross input (136kW net input) and above must comply with the Clean Air Act with respect to
the chimney discharge height.
The terminal/s shall be guarded if it is less than 2000mm above the ground or in any position where it may cause injury to
persons resulting from touching a hot surface.
Absolute guidance must be sought from the respective regulation.
