Specifications

30259-0-0212Page 10
Figure 1
VENT CLEARANCES
US Installation 1
A =
Clearanceaboveanygrade,
veranda,porchorbalcony
12in(30cm)
B =
Clearancetowindowordoor
thatmaybeopened
6in(15cm)forappliances≤
10,000Btu/h(3kW),9in(23
cm)forappliances>10,000
Btu/h(3kW)and≤50,000
Btu/h(15kW),12in(30cm)
forappliances>50,000Btu/h
(15kW)
C =
Clearancetopermanently
closedwindows
*
D =
Vertical clearance to venti-
latedsoftlocatedabovethe
terminalwithinahorizontal
distanceof2ft(61mm)from
the center line of the terminal
*
E =
Clearancetounventilated
soft
*
F = Clearanceofoutsidecorner *
G = Clearanceofinsidecorner *
H =
Clearancetoeachsideof
centerlineextendedabove
meter/regulatorassembly
*
I =
Clearance to service regulator
vent outlet
*
J =
Clearance to non-mechanical
airsupplyinlettobuildingor
thecombustionairinlettoany
otherappliance
6in(15cm)forappliances≤
10,000Btu/h(3kW),9in(23
cm)forappliances>10,000
Btu/h(3kW)and≤50,000
Btu/h(15kW),12in(30cm)
forappliances>50,000Btu/h
(15kW)
K =
Clearance to a mechanical air
supplyinlet
3ft(91cm)aboveifwithin10
ft(3m)horizontally
L =
Clearanceabovepaved
sidewalkorpaveddriveway
locatedonpublicproperty†
*
M =
Clearanceunderveranda,
porchdeck,orbalcony¥
*
1
InaccordancewiththecurrentANSIZ223.1/NFPA54,National
FuelGasCode
†
Aventshallnotterminatedirectlyaboveasidewalkorpaved
drivewaythatislocatedbetweentwosinglefamilydwellings
andservesbothdwellings.
¥
Permittedonlyifveranda,porch,deckorbalconyisfullyopen
onaminimumoftwosidesbeneaththeoor.
*
ForclearancesnotspeciedinANSIZ223.1/NFPA54orCSA
B149.1,refertolocalcodes.