Flexible Vent System - ECR International COMBI 115 Installation, Operation And Maintenance Manual

5 .1 4 ( 3 " / 8 0 m m Only) Flex ible Vent Syst em
Flexible vent syst em s shall only be run vert ical.
N o t e
Horizontal runs before adapting to flexible must
be rigid pipe.
Flex ible Pipe M inim um & M a x im um Vent Lengt hs
3 " [ 8 0 m m ]
Dia m et er Pipe
Exhaust
N a t a lini
I nt ake
Exhaust
Dura Vent ®
I nt ake
Exhaust
Centrotherm
I nt ake
Exhaust
Z- Dens
I nt ake
Single W a ll Elbow s - Equiva lent Lengt h
4 5 ° bend
9 0 ° bend
• Follow vent ing m anufact urer's inst ruct ions on assem bly
and clearances t o m aint ain.
• Maxim um vent lengt hs based on equivalent st raight
runs only. Include rigid pipe and fittings in overall
equivalent lengt h calculat ions.
• Flexible vent ing inst allat ions use single wall
polypropylene to pass flue gasses to base of chimney,
then flexible venting to get them to termination at the
t op.
• Com bust ion air is not supplied t hrough m asonry
chim ney. Com bust ion air m ust be from out side using 3"
[ 80 m m ] single wall polypropylene.
• Posit ion boiler t o use m inim um of rigid single wall
polypropylene vent ing t o t he chim ney.
• Avoid sharp bends in flexible venting.
5 - COM BU STI ON AI R AN D V EN T PI PI N G
7 5 / 1 0 0 / 1 1 5 / 1 2 5 / 1 5 0
M in M a x M in
6 ft 75 ft 6 ft
[ 1.8 m ] [ 22.8 m ] [ 1.8 m ]
6 ft 6 ft
50 ft [ 15.2
m ]
[ 1.8 m ] [ 1.8 m ]
6 ft 6 ft
82 ft [ 24.9
m ]
[ 1.8 m ] [ 1.8 m ]
6 ft 6 ft
50 ft [ 15.2
m ]
[ 1.8 m ] [ 1.8 m ]
6 ft 6 ft
52 ft [ 15.8
m ]
[ 1.8 m ] [ 1.8 m ]
6 ft 6 ft
50 ft [ 15.2
m ]
[ 1.8 m ] [ 1.8 m ]
6 ft
NA
[ 1.8 m ]
3" [ 80 m m ]
0.82 ft [ 0.25 m ]
1.64 ft [ 0.50 m ]
FI GURE 5 - 3 3 - ( 3 " / 8 0 m m Only) Flex ible Vent ing
Syst em CAN BE U SED ON ALL SI Z ES
1 6 5 / 2 0 5
M a x
50 ft
[ 15.2 m ]
50 ft
[ 15.2 m ]
50 ft
[ 15.2 m ]
50 ft
[ 15.2 m ]
50 ft
[ 15.2 m ]
50 ft
[ 15.2 m ]
50 ft
[ 15.2 m ]
Com bust ion
Air
2 9
Vent Term inal
Flexible Vent
Rigid Vent
240013687 REV A [ 09/ 01/ 2022]
Use Vent ing
Manufact urer
supplied base
support , not a
Tee