andrews CWH30/100 Installation Manual, Operation And Maintenance Manual page 22

SECTION 3
CWH30 & CWH60 Alternative Flue Systems
135
To
1
0
drain
Flat roof Flashing
E065
Angled roof
flashing
E066
20
INSTALLATION
CWH30 max 50M Conventional
CWH60 max 20M Conventional
CWH30 max 14 M Concentric
CWH60 max 12M Concentric
O ver 1.5M use flue
Condense trap.
Condense Tap
Can be cut to suit
roof structure
Minimum between
V ertical terminals
Minimum between balanced
flued horizontal terminals
For concentric flue runs
reduce overall length by:
1.2M when using 90º bend
0.7M when using 45º bend
and 1.5M when using
condense trap
Can be cut
to suit roof
structure
0
300mm
CWH30 max
50M Conventional
CWH60 max
20M Conventional
CWH30 max
14M Concentric
CWH60 max
12M Concentric
1