American Water Heater HCG3 130T 300 instruction manual Termination Clearances Sidewall Power Vent

Termination Clearances Sidewall Power Vent

POWER VENT

(using room 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 48

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				H	of center line extended		height 15 feet (4.5 m)
	veranda, porch, deck or	12 inches (30 cm)	12 inches (30 cm)		above meter/regulator	(4.5 m) above the meter/	above the meter/regulator
	balcony				assembly	regulator assembly	assembly*
		6 inches (15 cm) for appliances up to
	Clearance to window	10,000 Btu/hr (3 kW), 12 inches (30	4 feet (1.2 m) below		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)
						6 inches (15 cm) for appliances up
					Clearance to a non	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						3 feet (91 cm) above if
	above the terminal				Clearance to a
D				K			within
	within a horizontal	12 inches (30 cm)*	12 inches (30 cm)*		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 above paved
E	Clearance to	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.

34