UTICA BOILERS MAHF-75 Installation, Operation And Maintenance Manual page 24

( Maxim um Equivalent Vent Lengt h Shown)
Vent
Vent Size
Type
2"
( 60 m m )
Tw in
Pipe
3"
( 80 m m )
Vent Size
2"/ 4"
Coaxial
( 60 m m / 100 m m )
3"/ 5"
( 80 m m / 128 m m )
* For vertical runs only
* * I n Canada ULC S636 and in the USA UL1738 schedule 40 CPVC are the only approved Vent Material to be used as
an alternative to Polypropylene venting for the exhaust pipe.
* * * See Figures 5- 8 to 5- 10 for L1 & L2 details.
Vent
Vent Size
Type
2"
( 60 m m )
Tw in
Pipe
3"
( 80 m m )
Vent Size
2"/ 4"
Coaxial
( 60 m m / 100 m m )
3"/ 5"
( 80 m m / 128 m m )
* For vertical runs only
* * I n Canada ULC S636 and in the USA UL1738 schedule 40 CPVC are the only approved Vent Material to be used as
an alternative to Polypropylene venting for the exhaust pipe.
* * * See Figures 5- 8 to 5- 10 for L1 & L2 details.
5 - COM BU STI ON AI R AN D V EN T PI PI N G
VEN T M ATERI AL OPTI ON S
7 5 / 1 0 0 / 1 1 5 / 1 2 5 / 1 5 0
I nt ake
Vent
( L1 * * * )
Mat erial
Max
85 ft
Polypropylene
( 25.9 m )
Polypropylene
Flexible
Exhaust* w/
Rigid 3" PP
49 ft
I ntake
( 15 m )
CPVC* *
( PVC optional
on intake
ONLY)
N at alini
Mat erial
Max
32.8 ft
( 10 m )
Polypropylene
1 6 5 / 2 0 5
I nt ake
Vent
( L1 * * * )
Mat erial
Max
85 ft
Polypropylene
( 25.9 m )
Polypropylene
Flexible
Exhaust* w/
Rigid 3" PP
100 ft
I ntake
( 30.5 m )
CPVC* *
( PVC optional
on intake
ONLY)
N at alini
Mat erial
Max
Polypropylene
32.8 ft
( 10 m )
Exhaust
( L2 * * * )
Min Max
6 ft 85 ft
( 1.8 m ) ( 25.9 m )
6 ft 147 ft
( 1.8 m ) ( 45 m )
DuraVent
Min Max
6 ft 27.88 ft
( 1.8 m ) ( 8.5 m )
Exhaust
( L2 * * * )
Min Max
6 ft 85 ft
( 1.8 m ) ( 25.9 m ) ( 1.8 m )
6 ft 100 ft
( 1.8 m ) ( 30.5 m ) ( 1.8 m )
DuraVent
Min Max
6 ft 32.8 ft
( 1.8 m ) ( 10 m ) ( 1.8 m )
2 0
Com bined Vent
( L1 + L2 )
Min Max Min
6 ft 170 ft 12 ft
( 1.8 m ) ( 51.8 m ) ( 3.6 m )
6 ft 196 ft 12 ft
( 1.8 m ) ( 60 m ) ( 3.6 m )
Cent rot herm
Min Max Min
6 ft 24.60 ft 6 ft
( 1.8 m ) ( 8.5 m ) ( 1.8 m )
Com bined Vent
( L1 + L2 )
Min Max Min
6 ft 170 ft 12 ft
( 51.8 m ) ( 3.6 m )
6 ft 200 ft 12 ft
( 60.9 m ) ( 3.6 m )
Cent rot herm
Min Max Min
6 ft 32.8 ft 6 ft
( 10 m ) ( 1.8 m )
240013503 REV A, [ 03/ 15/ 2022]