Bradford-White Corp TGHE-160I-N(X), TGHE-1991-N(X) Vent / Air Intake Terminal Locations

Vent / Air Intake Terminal Locations

Direct Vent Terminal Location

Plan the vent system layout so that proper clearances are maintained from plumbing and wiring. Before the vent is installed, determine the vent pipe termination location as shown below in the Vent Terminal Location illustration.

Figure 8. Vent / Air Intake Terminal Positions – Minimum Dimensions.

Table 6. Vent Installation Requirements.

		Canadian 1	US	2			Canadian 1	US Installations2
		Installations	Installations				Installations
	Clearance above						36 inches (91 cm) within
			12 inches			Clearance to each side of	a height 15 feet (4.6 m)
A	grade, veranda,	12 inches (30 cm)			H
						center line extended above	above the	*b
	porch, deck or		(30 cm)
						meter/regulator assembly	meter/regulator
	balcony
							assembly
	Clearance to widow	36 inches (91 cm)	12 inches (30 cm)			Clearance to service
B		for appliances >	for appliances >		I		36 inches
	or door that may be					regulator vent outlet or oil		*b
		100,000 Btuh (30	50,000 Btuh (15				(91 cm)
	opened					tank vent
		kW)	kW)
						Clearance to non-
C	Clearance to				J	mechanical air supply inlet	36 inches (91 cm) for	12 inches (30 cm) for
	permanently closed	*b	*b			to building or the	appliances > 100,000	appliances > 50,000
	widow					combustion air inlet to any	Btuh (30 kW)	Btuh (15 kW).
						other appliance
	Vertical clearance
	to ventilated soffit
	located above the							3 feet (91 cm) above
D	terminal within a	*b	*b		K	Clearance to a mechanical	6 feet
								if within 10 feet
	horizontal distance					air supply inlet	(1.83 m)
								horizontally
	of 2 feet (61 cm)
	from the center line
	of the terminal
						Clearance above paved
E	Clearance to	*b	*b		L	sidewalk or paved	7 feet	*b
	unventilated soffit					driveway located on public	(2.13 m)†
						property
F	Clearance to				M	Clearance under a
		*b	*b			veranda, porch, deck, or	12 inches (30 cm) ‡	*b
	outside corner
						balcony
G	Clearance to inside	36 inches	36 inches
	corner	(91 cm)*a	(91 cm)*a

1In accordance with the current CAN/CGA-B149 Installation Codes.

2In accordance with the current ANSI Z223.1-(Latest Edition)/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 a veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. *a) A minimum clearance value determined by testing in accordance with section 2.20.

*b) “Clearance in accordance with local installation codes and the requirements of the gas supplier.”

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