State Industries SUF-100-250, SUF-60-120 Termination Clearances Sidewall Direct Vent

Termination Clearances Sidewall Direct Vent

DIRECT VENT

(using outdoor air for combustion)

EXTERIOR CLEARANCES FOR SIDEWALL VENT TERMINATION

G

V

D

A

H

vE

L

B

v

B

C

B

V

FIXED

E

V

FIXED

V

OPERABL

CLOSED

M

X

CLOSED

V

OPERABL

E

X

V

B

V

F

B

J

K

A

B

V

VENT TERMINAL

X AIR SUPPLY INLET

AREA WHERE TERMINAL IS NOT PERMITTED

Figure 49

Vent terminal clearances for “Direct Vent” installations. Direct Vent configurations use outdoor air for combustion.

		Canadian Installations 1	US Installations 2			Canadian Installations 1	US Installations 2
	Clearance above grade,				Clearance to each side	3 feet (91 cm) within a height 15	3 feet (91 cm) within a height
A				H	of center line extended
	veranda, porch, deck or	12 inches (30 cm)	12 inches (30 cm)		above meter/regulator	feet (4.5 m) above the meter/	15 feet (4.5 m) above the
	balcony				assembly	regulator assembly	meter/regulator assembly*
			6 inches (15 cm)
		6 inches (15 cm) for appliances	for appliances up to
			10,000 Btu/hr (3 kW),
		up to 10,000 Btu/hr (3 kW), 12
			9 inches (23 cm) for
		inches (30 cm) for appliances
B	Clearance to window or		appliances between	I	Clearance to service
		between 10,000 Btu/hr (3 kW)				3 feet (91 cm)	3 feet (91 cm)*
	door that may be opened		10,000 Btu/hr (3 kW)		regulator vent outlet
		and 100,000 Btu/hr (30 kW), 36	and 50,000 Btu/hr (15
		inches (91 cm) for appliances
			kW), 12 inches (30 cm)
		above 100,000 Btu/hr (30 kW)
			for appliances above
			50,000 Btu/hr (15 kW)
						6 inches (15 cm) for appliances up	6 inches (15 cm) for
							appliances up to 10,000
					Clearance to a non	to 10,000 Btu/hr (3 kW), 12 inches
							Btu/hr (3 kW), 9 inches (23
	Clearance to				mechanical air supply	(30 cm) for appliances between
C				J			cm) for appliances between
	permanently closed	6 inches (15 cm)*	6 inches (15 cm)*		inlet into building or	10,000 Btu/hr (3 kW) and 100,000
							10,000 Btu/hr (3 kW) and
	window				combustion air inlet to	Btu/hr (30 kW), 36 inches (91 cm)	50,000 Btu/hr (15 kW), 12
					any other appliance	for appliances above 100,000 Btu/
							inches (30 cm) for appliances
						hr (30 kW)
							above 50,000 Btu/hr (15 kW)
	Vertical clearance to
	ventilated soffit located				Clearance to a
D	above the terminal within			K			3 feet (91 cm) above if within
		12 inches (30 cm)*	12 inches (30 cm)*		mechanical air supply	6 feet (1.83 m)
	a horizontal distance of						10 feet (3 m) horizontally
	2 feet (61 cm) from the				inlet
	center line of the terminal
					Clearance above
E	Clearance to unventilated	12 inches (30 cm)*	12 inches (30 cm)*	L	paved sidewalk or	7 feet (2.13 m)†	7 feet (2.13 m)†*
	soffit				paved driveway located
					on public property
F	cornerClearance to outside			M	Clearance under
		2 feet (60 cm)*	2 feet (60 cm)*		veranda, porch, deck,	12 inches (30 cm) ‡	12 inches (30 cm) ‡*
					or balcony
G	cornerClearance to inside	18 inches (45 cm)*	18 inches (45 cm)*

1 In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code. 2 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 floor.

* Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer’s installation instructions.

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