Bradford-White Corp BNTH, BNTV SECTION Venting and Combustion Air, Combustion Air From Room

Page 12 BRADFORD WHITE CORP.

SECTION 3.

Venting and Combustion Air

3.1 Combustion Air

Brute Elite boilers and water heaters must have provisions for combustion and ventilation air in accordance with the applicable requirements for Combustion Air Supply and Ventilation in the National Fuel Gas Code, ANSI Z223 1; or in Canada, the Natural Gas and Propane Installation Code, CSA B149.1. All applicable provisions of local building codes must also be adhered to.

A Brute Elite unit can take combustion air from the space in which it is installed, or the combustion air can be ducted directly to the unit. Ventilation air must be provided in either case.

3.1.1Combustion Air From Room

In the United States, the most common

requirements specify that the space shall communicate with the outdoors in accordance with method 1 or 2, which follow. Where ducts are used, they shall be of the same cross-sectional area as the free area of the openings to which they connect.

HORIZONTAL INTAKE AND EXHAUST PVC VENT TERMINAL KITS

SIZE	2" PVC		3" PVC		4" PVC	6" PVC
	Standard	Concentric	Standard	Concentric	Standard	Standard
		CA006000	CA005900 239-44069-01
80	included	optional	optional	optional	n/a	n/a
105	included	optional	optional	optional	n/a	n/a
150	n/a	n/a	included	optional	n/a	n/a
199/210	n/a	n/a	included	optional	n/a	n/a
285	n/a	n/a	optional	optional	included	n/a
399	n/a	n/a	n/a	n/a	included	n/a
500	n/a	n/a	n/a	n/a	included	n/a
600	n/a	n/a	n/a	n/a	included	optional
750	n/a	n/a	n/a	n/a	n/a	included
850	n/a	n/a	n/a	n/a	n/a	included

Concentric vent terminal = 10 ft. pipe length.

Method 1: Two permanent openings, one

commencing within 12" (300mm) of the top and one commencing within 12" (300mm) of the bottom, of the enclosure shall be provided. The openings shall communicate directly, or by ducts, with the outdoors or spaces that freely communicate with the outdoors. When directly communicating with the outdoors, or when communicating to the outdoors through vertical ducts, each opening shall have a minimum free area of 1 square inch per 4000 Btu/hr (550 square mm/kW) of total input rating of all equipment in the enclosure. When communicating to the outdoors through horizontal ducts, each opening shall have a minimum free area of not less than 1 square inch per 2000 Btu/hr (1100 square mm/kW) of total input rating of all equipment in the enclosure.

Method 2: One permanent opening, commencing within 12" (300mm) of the top of the enclosure, shall be permitted. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that directly communicate with the outdoors and shall have a minimum free area of 1 square inch per 3000 Btu/hr (734 square mm/kW) of the total input rating of all equipment located in the enclosure. This opening must not be less than the sum of the areas of all vent connectors in the confined space.

Other methods of introducing combustion and ventilation air are acceptable, providing they conform to the requirements in the applicable codes listed above.

In Canada, consult local building and safety codes or, in absence of such requirements, follow CAN/CGA B149.

3.1.2 Ducted Combustion Air

The combustion air can be taken through the wall, or through the roof. When taken from the wall, it must be taken from out-of-doors by means of the horizontal wall terminal, shown in Table(s) 3. See Table 2 to select the appropriate diameter air pipe. When taken from the roof, a field-supplied rain cap or an elbow arrangement must be used to prevent entry of rain water (see Figure10).

Use ABS, PVC, CPVC or galvanized pipe for the

Table 3a. PVC Vent Terminal Kits.

SIZE	PRO TECH (FasNSeal)					HEAT FAB (Saf-T-Vent)				Z FLEX (Z-Vent)
	Boiler		Flue	Intake Air	Boiler	Intermediate	Flue	Intake Air	Boiler	Flue	Intake Air
	Adapter	Termination		Termination	Adapter	Adapter	Termination	Termination	Adapter	Termination	Termination
399-600	F303759		FSBS4	FSAIH04	KB285600	9454BUREZ-1*	9492	9414TERM	2SVSLA04	2SVSTP04	2SVSTEX0490
		FSRC4(R.C)		303888			5400CI			2SVSRCX04
750-850	F303759		FSBS6	FSAIH04	Table 3b. Approved Stainless Steel Terminations and Adapters.
	(intake only)			303888
						INSTALLATION STANDARDS
MATERIAL				UNITED STATES					CANADA
ABS				ANSI/ASTM D1527
PVC, sch 40			ANSI/ASTM D1785 or D2665					Air pipe material must be chosen
CPVC, sch 40				ANSI/ASTM F441			based upon the intended application of the boiler.
Single wall galv. steel				26 gauge

Table 4. Required Combustion Air Pipe Material.