Other than Direct Vent Termination Clearance
H
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\X!" AIR SUPPLY INLET _ AREAWHERE TERMINAL IS NOT PERMITED
I_l VENT TERMINAL /')'_
Item ClearanceDescriptions CanadianInstallation(1) U.S.Installation (2)
A Clearanceabovegrade,veranda,porch, deck,balcony,or 12" (30cm)# 12" (30 cm)
anticipatedsnowlevel
B Clearanceto awindowordoorthat maybe opened 12" (30cm) forappliances > 10,000Btuh (3kW) and < 4'(1.2 m)belowor tothe sideofthe opening.1'(30 cm)above
100,000Btuh (30kW), 36" (91cm)for appliances > 100,000 the opening.
Btuh(30 kW)
C Clearanceto apermanentlyclosed window * *
D Verticalclearanceto aventilatedsoffit locatedabovethe * *
terminalwithina horizontaldistanceof 2' (61cm)from the
centerlineofthe terminal
E Clearanceto an unventilatedsoffit * *
F Clearanceto an outsidecorner * *
G Clearanceto an insidecorner *
H Clearanceto eachsideofthe centerlineextendedabove 3' (91cm) within 15' (4.5 m)abovethe meter/regulator 3' (91 cm) within15' (4.5 m) abovethemeter/regulator
electricalmeteror gasservice regulatorassembly assembly assembly
I Clearanceto sewiceregulatorvent outlet 3' (91cm) *
J Clearanceto non=mechanicalair supplyinlet to buildingor 12" (30cm) for appliances > 10,000Btuh (3kW) and < 4' (1.2 m)belowor tothe side of opening: 1' (30 cm)above
thecombustionair inlettoany other appliance 100,000Btuh (30kW), 36" (91 cm) for appliances > opening.
100,000Btuh (30kW)
K Clearanceto amechanicalair 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 eachsideofthe centerlineextendedaboveor * *
belowventterminal of thefurnace to a dryer or water heater
vent,orother appliance'sdirectvent intake orexhaust.
N Clearanceto thevent terminalofa dryervent,water heater * *
vent,orother appliancesdirectvent intakeorexhaust.
O Clearancefrom a plumbingventstack * *
P 7' (2.13m) ** 7' (2.13 m)
Clearanceabovea pavedsidewalkor paveddrivewaylocated
on punic property.
> greaterthan, _>greaterthan orequalto, < lessthan, _ lessthanor equalto
(1.) Inaccordancewith the currentCSAB149.1, NaturalGasandPropaneInstallationCode
(2.) Inaccordancewith the currentANSIZ223.1/NFPA54,National FuelGas Code
# 18" (46cm)aboveroof surface
+ Permittedonlyif veranda,porch,deck,or balconyis fully openon a minimumof two sides beneaththefloor.
ForclearancesnotspecifiedinANSIZ223.1/NFPA54 orCSAB149.1,dearancesshallbe inaccordancewith localinstallationcodesandthe requirementsof thegas supplierand themanufacture'sinstallation
instructions.
A ventshall notterminatedirectlyabovea sidewalkor paveddrivewaythatis locatedbetweentwo singlefamily dwellingsand servesboth dwellings.
Notes:
1. The ventforthis applianceshallnotterminate
a. Overpublicwalkways;or
b. Nearsoffitvents orcrawl spaceventsor other areaswherecondensateorvapor couldcreate a nuisanceor hazardor propertydamage;or
c. Wherecondensatevaporcould causedamage orcouldbe detrimentaltothe operationof regulators,relief valves, orother equipment.
2. When locatingventterminations,considerationmust be givento prevailingwinds,location,and other conditionswhichmay causerecircolationof the combustionproductsofadjacentvents.
Recirculationcan causepoorcombustion,inlet condensateproblems,and acoeleratedcorrosionof the heatexchangers.
3. Avoidventingundera deck orlargeoverhang. Recirculationcouldoccur andcauseperformanceor systemproblems.
440 O1 1051 03 Specifications are subject to change without notice. 17
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