Item | Clearance Description |
AClearance above grade, veranda, porch, deck, balcony, or anticipated snow level
BClearance to a window or door that may he opened
Canadian Installation (1)
12" (30cm)#
6" (15 cm) for appliances _< 10,000 BTUH (3kW), 12" (30 cm) for appliances > 10,000 Btuh (3 kW) and _<100,O00 Btub (30 kW), 36" (91 cm) for appliances > 100,000 Btab (30 kW)
U.S. Installation (2)
12" (30cm)
6" (15 cm) for appliances_<10,000BTUH(3kW),9" (23 cm) for appliances>10,000Btuh(3 kW)and _<50,000Btuh(15 kW),12" (30cm) for appliances>50,000Btub(15 kW)
CClearance to a permanently closed window
DVertical clearance to a ventilated soffit located above the
terminal within a horizontal distance of 2'(61cm) from the centedine of the terminal
EClearance to an unventilated soffit
FClearance to an outside corner
O | Clearance | to | an inside | corner |
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H | Clearance | to each side | of the | centedine | extended above | 3'(91 cm) within 15' (4.5 m) above the meter/regulator | ||
| electrical | meter | or gas | service | regulator | assembly | assembly | |
I | Clearance | to | service regulator | vent outlet | 3'(91 cm) | |||
J | Clearance | to | air supply | inlet to building or | 6" (15cm)forappliances_<lO,OOOBTUH(3kW),9" (23cm) | |||
| the combustion | air inlet | to any | other appliance | for appliances> 10,000Btah (3kW) and _<100,000Btah(30 | |||
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| kW) and _<50,000Btuh(15kW), 12" (30 cm) for appliances |
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| > 50,000Btah(15kW) |
3'(91 cm) within 15' (4.5 m) above the meter/regulator assembly
6" (15cm)forappliances_<lO,OOOBTUH(3kW),9" | (23cm) |
for appliances > 10,000 Btah (3 kW) and _<50,000 Btuh (15 kW), 12" (30 cm) for appliances > 50,000 Btuh (15 kW)
K | Clearance | to a mechanical | air supply inlet | 6'(1.83m) | 3'(91 cm) above if within 10' (3m horizontally) | ||
L | Clearance | under a veranda, | porch, deck, | or balcony | 12" | (30 cm) | + |
M | Clearance | to each side of the centerline | extended above or | 12" | (30 cm) | 12" (30 cm) | |
| below vent terminal of the furnace to a dryer or water heater |
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| vent, or other appliance's direct vent intake or exhaust. |
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N | Clearance | from a plumbing | vent stack |
| 3'(91 cm) | 3'(91 cm) | |
(1.) | In accordance wifh the currem CSA B149.1, Natural Gas and Propane Installation Code | ||||||
(2.) | In accordance | with the current ANSI Z223.1/NFPA 54, National | Fuel Gas Code |
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#18" (46 cm) above roof surface
+ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
For clearances not specified in AN SI Z223.1/N FPA 54 or C SA B149.1, clearances shall be in accordance with local installation codes and the requirements of the gas supplier and the manufactare's installatio i instructions.
Notes:
1. The vent for this appliance shall not terminate a. Over public walkways; or
b. Near soffit vents or crawl space veins or other areas where condensate or vapor could create a nusiance or hazard or property damage; or c. Where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment.
2. When locating vent terminations, consideration must be given to prevailing winds, location, and other conditions which may cause recirculation of the combustiob products of adjacent vents. Recircula0on can cause poor combustion, inlet condensate problems, and accelerated corrosion of the heat exchangers.
440O1102004 | E_ |