Specifications

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Figure 60 _Other than Direct Vent Clearance - Ventilated Combustion Air Option
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tXi AIR SUPPLY INLET
D VENT TERMINAL \ Y_":x E_ AREAWHERETERMINAL IS NOT PERMITED
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ClearanceDescriptions CanadianInstallation(1) U.S. Installation (2)
Clearanceabovegrade, verand&porch, decL balcony,or
anticipatedsnow level 12in. (305 ram), 18 in.(457 ram)aboveroofsurface 12 in. (305ram)
12in. (305mm) for appliances > 10,000Btuh (3kW)and 4 ft.(1.2 m) below orto the side of the opening,lft.(.3 m)
Clearanceto a window ordoor that maybe opened < 100,000Btuh (30kW), 36in. (914ram)for appliances >
100,000Btuh (30kW) abovetheopening.
Clearanceto a permanentlyclosedwindow
Vertical clearanceto aventilatedsoffit locatedabovethe
terminalwithina horizontal distanceof 2' (61cm)from the
centerline of theterminal
Clearanceto an unventilatedsoffit
Clearanceto an outsidecorner
Clearanceto an inside corner
Clearanceto each side of the centerlineextendedabove
electrical meterorgas serviceregulatorassembly
Forclearances notspecified inANSI Z223.1/NFPA54 or
CANICSAB149.1,clearances shallbe in accordancewith
local installationcodes andthe requirementsofthe gas suppli-
er and themanufacture'sinstallationinstructions.
3 ft. (.9 m) withina height 15ft (4.5m) abovethe meter/regu-
lator assembly
For clearancesnot spedfied in ANSI Z223.1/NFPA54 or CAN/
CSAB149.1, dearancesshallbe in accordancewith local instal-
lationcodes and the requirementsof the gas supplier andthe
manufacture'sinstallationinstructions.
3 ft. (.9 m) within15 ft. (4.5m) abovethe meter/regulator
assembly
3 ft. (.9 m) For dearances not specifiedin ANSI Z223.1/NFPA
54 orCANICSAB149.1, clearancesshallbe in accordancewith
localinstallationcodesand the requirementsofthe gassupplier
and the manufacture'sinstallationinstructions.
I Clearanceto serviceregulatorventoutlet 3 ft. (.9 m)
Clearanceto non-mechanicalair supplyinlet tobuildingor the 12in. (305ram)for appliances > 10,000Btuh (3kW) and 4 ft. (1.2 m)belowor tothe side of opening: 1ft. (.3 m) above
< 100,000Btuh (30kW), 36 in. (914 ram)for appliances >
J combustionair inletto any other appliance 100,000Btuh (30kW) opening.
K Clearanceto a mechanicalair supplyinlet 6 ft. (1.83m) 3 ft.(.9 m) aboveif within 10ft. (3 m) horizontally
12in. (305ram)Permittedonlyif veranda•porch•deck,or Forclearancesnot spedfied in ANSIZ223.1/NFPA54 or CAN/
• ' CSAB149.1, dearances shallbe in accordancewith local instal-
L Clearanceundera veranda,porch, deck,or balcony balconyis fully openon a minimumof twosides beneaththe
lationcodes and the requirementsof the gas supplier andthe
floor, manufacture'sinstallationinstructions.
Clearanceto each side of the centedineextendedaboveor
M belowventterminalof thefurnace toa dryer orwater heater 12in. (305 ram) 12 in. (305ram)
vent, or other appliance'sdirectvent intake orexhaust.
Clearanceto the ventterminalof a dryervent,water heater 3 ft. (.9 m) 3 ft. (.9 m)
N vent, or other appliancesdirectvent intakeor exhaust.
O Clearancefrom a plumbingvent stack 3 ft. (.9 m) 3 ft. (.9 m)
7 ft. (2.1m) Avent shall notterminate directlyabove aside-
p Clearanceabovea pavedsidewalkor paveddrivewaylocated walk or paveddrivewaythat is locatedbetweentwosingle 7ft. (2.1 m)
on publicproperty, family dwellingsand servesboth dwellings.
> greaterthan, > greater than or equalto, < lessthan, < less than or equalto
(1) In accordancewith thecurrent CANICSAB149.1,NaturalGas and PropaneInstallationCode
(2) In accordancewith the currentANSIZ223.1/NFPA54, NationalFuel GasCode
Notes:
1 Thevent for this applianceshallnotterminate
a. Overpublic walkways;or
b. Nearsoffit ventsor crawl spacevents orother areas wherecondensateor vapor couldcreatea nuisance orhazardor property damage;or
c. Where condensatevaporcouldcause damageor couldbe detrimentalto theoperation ofregulators,relief valves, orother equipment.
2. When locatingventterminations,considerationmust be givento prevailingwinds,location,and other conditionswhichmaycause recirculationof thecombustionproducts ofadjacentvents.
Recirculationcan cause poorcombustion,inletcondensateproblems,and acceleratedcorrosionof the heat exchangers.
3. Avoid ventingundera deckor largeoverhang.Recirculationcouldoccurand cause performanceorsystem problems.
440 01 4201 01 Specificati ..... bject to change without notice. 45