State Industries SHE 50 76N Termination Clearances Sidewall Power Vent, Vent Pipe Termination

Termination Clearances Sidewall Power Vent

POWER VENT

(using room air for combustion)

EXTERIOR CLEARANCES FOR SIDEWALL VENT TERMINATION

G

D

vE

L B

v

V

A

		C			B					B	V
										FIXED
									E
	V		FIXED			V		OPERABL		CLOSED
			CLOSED
	V		OPERABL	E	B			V		X
F
							B			J
								A
		B

H

M

V	X
	K

V

VENT TERMINAL X AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED

FIGURE 15.

Vent terminal clearances for “Power Vent” installations. Power Vent configurations use room 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 feet	3 feet (91 cm) within a
A	veranda, porch, deck or	12 inches (30 cm)	12 inches (30 cm)	H	of center line extended	(4.5 m) above the meter/	height 15 feet (4.5 m)
					above meter/regulator		above the meter/regulator
	balcony				assembly	regulator assembly	assembly*
		6 inches (15 cm) for appliances up to	4 feet (1.2 m) below
	Clearance to window	10,000 Btu/hr (3 kW), 12 inches (30			Clearance to service
B		cm) for appliances between 10,000	or to side of opening;	I
	or door that may be				regulator vent outlet	3 feet (91 cm)	3 feet (91 cm)*
		Btu/hr (3 kW) and 100,000 Btu/hr (30	1 foot (30 cm) above
	opened	kW), 36 inches (91 cm) for appliances	opening
		above 100,000 Btu/hr (30 kW)
					Clearance to a non	6 inches (15 cm) for appliances up
						to 10,000 Btu/hr (3 kW), 12 inches	4 feet (1.2 m) below or to
	Clearance to				mechanical air supply	(30 cm) for appliances between
C				J			side of opening; 1 foot
	permanently closed	12 inches (30 cm)*	12 inches (30 cm)*		inlet into building or	10,000 Btu/hr (3 kW) and 100,000
							(30 cm) above opening.
	window				combustion air inlet to	Btu/hr (30kW), 36 inches (91cm)
					any other appliance	for appliances above 100,000 Btu/
						hr (30 kW)
	Vertical clearance to
	ventilated soffit located				Clearance to a		3 feet (91 cm) above if
	above the terminal
D		12 inches (30 cm)*	12 inches (30 cm)*	K			within
	within a horizontal				mechanical air supply	6 feet (1.83 m)
							10 feet (3 m) horizontally
	distance of 2 feet (61				inlet
	cm) from the center line
	of the terminal
	Clearance to				Clearance above paved
E		12 inches (30 cm)*	12 inches (30 cm)*	L	sidewalk or paved	7 feet (2.13 m)†	7 feet (2.13 m) †
	unventilated soffit				driveway located on
					public property
F	cornerClearance to outside			M	Clearance under
		2 feet (60 cm)*	2 feet (60 cm)*		veranda, porch, deck, or	12 inches (30 cm) ‡	12 inches (30 cm) ‡
					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.

VENT PIPE TERMINATION

The first step is to determine where the vent pipe will terminate. See Figures 15, 20 and 21. The vent may terminate through a sidewall as shown in Figure 20 or through the roof as shown in Figure 21.

The vent system must terminate so that proper clearances are maintained as cited in local codes or the current edition of the National Fuel Gas Code, (ANSI Z223.1, 12.9.1 through 12.9.4) or the Natural Gas and Propane Installation Code (CAN/CSA-B149.1).

Instructions on proper installation through a sidewall are provided in Figure 15.

Plan the vent system layout so that proper clearances are maintained from plumbing and wiring.

Vent pipes serving power vented appliances are classified by building codes as “vent connectors”. Required clearances from combustible materials must be provided in accordance with information in this manual under LOCATING THE NEW WATER HEATER and INSTALLING THE WATER HEATER, and with the National Fuel Gas Code and local codes.

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