Bradford-White Corp Direct Vent Gas Water Heater Internet Version for Reference Only

Internet Version for Reference Only

Installation (Venting) continued-

		Canadian	US Installations2
		Installations1
F=	Clearance to outside corner	*b	*b
G=	Clearance to inside corner	*b	*b
H=	Clearance to each side of center line	3 feet (91 cm)	*b
	extended above meter/regulator	within a height
	assembly	15 feet (4.6 m)
		above the
		meter/regulator
		assembly
I=	Clearance to service regulator vent	36 inches	*b
	outlet or oil tank vent	(91 cm)
J=	Clearance to non-mechanical air	12 inches (30	9 inches (23 cm) for appliances
	supply inlet to building or the	cm)	> 10,000 Btuh (3 kW) and ≤
	combustion air inlet to any other		50,000 Btuh (15 kW), 12 inches
	appliance		(30 cm) for appliances > 50,000
			Btuh (15 kW)
K=	Clearance to a mechanical air supply	6 feet	3 feet (91 cm) above if within 10
	inlet	(1.83 m)	feet horizontally
L=	Clearance above paved sidewalk or	7 feet	*b
	paved driveway located on public	(2.13 m)†
	property
M=	Clearance under a veranda, porch,	12 inches (30	*b
	deck, or balcony	cm) ‡

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

2 In 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”.

The vent system must terminate so that proper clearances are maintained as cited in local codes or the latest edition of the National Fuel Gas Code, ANSI Z223.1.73.4e and 7.8a, b as follows:

1. Do not terminate near soffit vents or crawl space or other area where

condensate or vapor could create a nuisance or hazard or cause property damage.

2. Do not terminate the exhaust vent terminal where condensate or vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment.

3. Do not terminate the exhaust vent terminal over public area or walkways where condensate or vapor can cause nuisance or hazard.

4. The vent shall terminate a minimum of 12 inches above expected snowfall level to prevent blockage of vent termination.

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 LOCATION OF WATER HEATER and CLEARANCES, and with National Fuel Gas Code and local codes.

13