UTICA BOILERS MAHF-75 Installation, Operation And Maintenance Manual page 34

FI GURE 5 - 3 4 - Flue Term ina l Loca t ion
All vent pipe and combustion air pipe and fittings shall comply with the following:
Use only m anufact urer approved vent ing m at erials or vent ing m at erials prim er and glue approved t o: ULC S636 in
Canada, or UL 1738 in t he U.S.
Mat erials used in t he U.S. shall com ply wit h Aut horit y having j urisdict ion and in absence of such wit h: ANSI / ASTM
D1785, ANSI / ASTM F441, ANSI / ASTM F493.
D
E
B
L
A
Clearance above grade, veranda, porch, deck, or balcony
B
Clearance t o window or door t hat m ay be opened
C
Clearance t o perm anent ly closed window
Vertical Clearance to ventilated soffit located above the terminal within a
D
horizontal distance of 2 feet ( 610 m m ) from the center line of the term inal
Clearance to unventilated soffit
E
F
Clearance t o out side corner
G
Clearance t o inside corner
Clearance t o each side of cent er line ext ended above m et er/
H
regulat or assem bly
I
Clearance t o service regulat or vent out let
Clearance t o non- m echanical air supply inlet t o building or t he
J
com bust ion air inlet t o any ot her appliance
K
Clearance t o m echanical air supply inlet
Clearance above paved sidewalk or paved driveway locat ed on
L
public propert y
† A vent shall not t erm inat e direct ly above a sidewalk or paved driveway t hat is
locat ed bet ween t wo single fam ily dwellings and serves bot h dwellings.
Local Codes or Regulations may require different clearances. Flue terminal must be exposed to external air and
N ot e :
posit ion m ust allow t he free passage of air across it at all t im es. I n cert ain weat her condit ions t he t erm inal m ay em it a
plum e of st eam . Avoid posit ioning t erm inal where t his m ay cause a nuisance.
5 - COM BU STI ON AI R AN D V EN T PI PI N G
C
V
Fixed
Closed
V
F
B
V
VENT TERMINAL
Ve n t Te r m in a t ion M in im u m Cle a r a n ce s
INSIDE CORNER
DETAIL
G
A
B
B
Operable
Fixed
B
V
J
AIR SUPPLY INLET
US I nst a lla t ions
12" ( 305 m m )
12" ( 305 m m )
* 12" ( 305 m m )
18" ( 457 m m )
18" ( 457 m m )
9" ( 229 m m )
36" ( 456 m m )
3 ft . ( 0.9 m ) wit hin a height
of 15 ft . ( 4.5 m ) above t he
m et er/ regulat or assem bly
3 ft . ( 0.9 m )
12" ( 305 m m )
* 3 ft . ( 0.9 m )
* 7 ft . ( 2.1 m )
*For clearances not specified in ANSI Z223.1/NFPA 54 or
CSA B149.1, clearance will be in accordance wit h local
inst allat ion codes and t he requirem ent s of t he gas supplier
and t hese inst allat ion inst ruct ions.
3 0
H
I
V
M
V
AREA WHERE TERMINAL IS
NOT PERMITTED
Ca na dia n I nst a lla t ions
12" ( 305 m m )
3 ft . ( 0.9 m )
* 12" ( 305 m m )
18" ( 457 m m )
18" ( 457 m m )
9" ( 229 m m )
36" ( 456 m m )
3 ft . ( 0.9 m )
3 ft . ( 0.9 m )
3 ft . ( 0.9 m )
6 ft . ( 1.8 m )
7 ft . ( 2.1 m ) †
240013503 REV A, [ 03/ 15/ 2022]
K