Desa Vm42eP installation manual Typical B-Vent Configuration, Roof Pitch

Venting INSTALLATION

Continued

		Listed
		Vent Cap			Listed	Listed
					Vent Cap
						Vent Cap
	Maintain		Maintain
			Listed
	Listed
			Clearance
	Clearance				Maintain		Maintain
			Support Each
					Listed		Listed
			Lateral At		Clearance		Clearance
			Least Every	45
		60	Six (6) Feet		12' Min.
	8'					45°	10'
		6'
12' Min.	Position		Position	45	Position		12' Min.
			Firestop		Firestop
	Firestop
		Maintain		Maintain			Maintain
		Listed		Listed			Listed
		Clearance		Clearance			Clearance

EXAMPLE 1 EXAMPLE 2 EXAMPLE 3

Figure 10 - Typical B-Vent Configuration

The flue connection must be made using listed B-type connectors and the existing system must be code inspected for damage and proper installation. It is not recommended that this appliance be com- mon vented with an existing gas burning appliance. However, if it becomes necessary to common vent this appliance, the venting system must be sized and configured in accordance with the common venting guides Appendix G of the current National Fuel Gas Code ANSI Z223.1/NFPA 54 and in

Lowest Listed

Discharge Vent Cap

Opening

	8 Ft. Min.
Listed
Gas
Vent	12

H(Min) Height From Roof

x

Roof Pitch x/12 Listed Clearance

Canada with CAN/CGA B149.

Note: Before connecting this appliance to an existing vent system or a common venting sys- tem consult with your local architect, planner or building official.

WARNING: This appliance must be properly connected to a system and must not be connected to a chimney flue servicing a separate solid fuel burning appliance.

	H (Min.)
Roof Pitch	Ft.	m
Flat to 6/12	1.0	0.30
6/12 to 7/12	1.25	0.38
Over 7/12 to 8/12	1.5	0.46
Over 8/12 to 9/12	2.0	0.61
Over 9/12 to 10/12	2.5	0.76
Over 10/12 to 11/12	3.25	0.99
Over 11/12 to 12/12	4.0	1.22
Over 12/12 to 14/12	5.0	1.52
Over 14/12 to 16/12	6.0	1.83
Over 16/12 to 18/12	7.0	2.13
Over 18/12 to 20/12	7.5	2.27
Over 20/12 to 21/12	8.0	2.44

Figure 11 - B-Vent Terminations

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