ICP C9MPD - VENT;COMBUSTION AIR PIPING; STANDARD VENT TERMINATION; Vent;Combustion Air Piping Charts

Direct Vent Termination Clearance
(X] AIR SUPPLY INLET
E_ AREA WHERE TERMINAL IS NOT PERMITED
D VENTTERMINAL \\\\\
Item ClearanceDescription CanadianInstallation (1) U.S.Installation (2)
A Clearanceabove grade,veranda,porch, deck,balcony,or 12" (30cm)# 12" (30 cm)
anticipatedsnowlevel
B Clearanceto awindowor doorthat maybe opened 12" (30 cm)for appliances > 10,000Btuh (3kW)and _< 9" (23 cm)for appliances > 10,000Btuh(3 kW)and -< 50,000
100,000Btuh(30 kW),36" (91 cm)for appliances > 100,000 Btuh(14.7 kW),12" (30cm)for appliances > 50,000Btuh (14.7
Btuh(30 kW) kW)
C Clearanceto a permanentlyclosedwindow * *
D Verticalclearanceto aventilated soffitlocatedabovethe * *
terminalwithina horizontaldistanceof 2' (61cm)from the
centerlineofthe terminal
E Clearanceto an unventilatedsoffit *
F Clearanceto an outsidecorner *
G Clearanceto an insidecomer *
H Clearanceto each side of the centerlineextendedabove 3' (91 cm) within 15' (4.5 m)abovethe meter/regulator *
electricalmeteror gasserviceregulatorassembly assembly
I Clearanceto serviceregulatorvent outlet 3' (91 cm)
J Clearanceto non-mechanicalair supplyinlet to building or 12" (30 cm)for appliances > 10,000Btuh (3kW) and < 9" (23 cm)for appliances > 10,000Btuh(3 kW)and _<
thecombustionair inletto any other appliance 100,000Btuh (30kW), 36" (91 cm)for appliances > 50,000Btuh(15 kW),12" (30cm) for appliances > 50,000
100,000Btuh (30kW) Btuh(14.7 kW)
K Clearanceto a mechanicalair supplyinlet 6' (1.83 m) 3' (91 cm) aboveif within 10' (3m) horizontally
L Clearanceunder averanda,porch, deck,or balcony 12" (30 cm)+
M Clearanceto eachside of the centerlineextendedaboveor 12" (30cm) 12" (30cm)
belowventterminal ofthefurnaceto adryer or water heater
vent,orother appliance'sdirectvent intakeorexhaust.
N Clearanceto thevent terminalof a dryervent, water heater 3' (91 cm) 3' (91 cm)
vent,orother appliancesdirectvent intake orexhaust.
O Clearancefrom a plumbingventstack 3' (91 cm) 3' (91 cm)
P Clearanceabove a pavedsidewalkor paveddrivewayIo- 7' (2.13 m)** *
catedon publicproperty.
> greaterthan, _>greaterthan orequalto, < lessthan, _ lessthanor equalto
(1.) Inaccordancewith the currentCSAB149.1, NaturalGas and PropaneInstallationCode
(2.) Inacccrdancewith the currentANSI Z223.1/NFPA54, NationalFuel Gas Code
# 18" (46cm)aboveroof surface
+ Permittedonly if veranda,porch,deck,or balconyis fully openon a minimumof twosides beneaththe floor.
Forclearancesnotspecifiedin ANSIZ223.1/NFPA54 or CSAB149.1,clearances shallbe in accordancewith localinstallationcodesand
the requirementsofthe gas supplierandthe manufacture'sinstallationinstructions.
** A ventshall notterminatedirectly abovea sidewalk orpaveddrivewaythat islocated betweentwo singlefamily dwellingsand servesboth dwellings.
Notes:
1. The ventforthis applianceshall notterminate
a. Over publicwalkways;or
b. Nearsoffitvents orcrawlspaceventsor otherareas wherecondensateorvapor could createa nuisance orhazardor propertydamage;or
c. Wherecondensatevapor cculd cause damageor couldbe detdmentalto theoperationof regulators,reliefvalves, or otherequipment.
2. When locatingventterminations,considerationmust be givento prevailingwinds, location,and other conditionswhich maycause recirculationofthe combustionproductsof adjacentvents.
Recirculationcan causepoor combustion,inletcondensateproblems,and acceleratedcorrosionof the heat exchangers.
3. Avoidventingundera deck orlarge overhang.Recirculationcould occurand cause performanceorsystem problems.
16 44001 102404
Specifications are subject to change without notice