Worcester 12/14 Installation And Servicing Instructions page 10

Fig. 7. Flue terminating positions for oil-fired appliances
NOTE: The dimensions given are for general guidance only. Other surrounding buildings or objects may affect the clearance of
combustion products. An alternative flue terminal position should be sought when there is any possibility of a nuisance being
caused by inadequate dispersal of flue products.
Terminals should be positioned so as to avoid products of combustion entering into buildings.
Boundry
Boundry
Terminal Position
A Directly below an opening, air brick, window, etc. .......................................... Not allowed
B Horizontally to an opening, air brick, window, etc. ........................................ Not allowed
C Below a gutter or sanitary pipe if combustible material protected. .............. Not allowed
D Below a balcony, eaves, gutter or drainage without protection
to combustible material. ...................................................................................... Not allowed
E From vertical sanitary pipework.. ....................................................................... Not allowed
F From an internal or external corner or boundry along side terminal. .......... Not allowed
G Above ground or balcony level. .......................................................................... Not allowed
H From a surface or boundry facing the terminal. .............................................. Not allowed
J From a terminal facing the terminal. ................................................................. Not allowed
K Vertically from a terminal on the same wall. ................................................... Not allowed
L Horizontally from a terminal on the same wall. .............................................. Not allowed
M Above an intersection with the roof. .................................................................
N From a vertical structure on the side of the terminal......................................
O Above a vertical structure less than 750mm from the side of the terminal.
P From a ridge terminal to a vertical structure on the roof................................
Fig. 8. Terminal guard Minimum dimensions.
265
280
Terminal guard.
See 7.4.5.
280
P
F
J
H
E
M
M
C.D.
B
A
Window
Flue
Terminal
G
Minimum Distance (mm)
Open
Flue
600
750
600
1500
10
O
N
K
F
L
F
Low-Level Vertical
Discharge Balanced Flue
600 Not allowed
600
75
600
300
300
300
600
1200
1500
750
Not applicable 732
Not applicable 750
Not applicable 732
Not applicable Not applicable
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