Vermont Casting DVHVAC36 manual General Venting Information Termination Location

DVHVAC36

General Venting Information - Termination Location

D

E

V

L

B

CFM145a

C

V�����

������

F V Operable

B

	INSIDE
	CORNER DETAIL
	G
	V				N
A			H	N
B
V		B	V
	Operable	Fixed
		Closed
	V J		B	M
B			X
					V K X
	A		I

V VENT TERMINATION X AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED

		Canadian Installations1	US Installations2
A =	Clearance above grade, veranda, porch,	12” (30cm)	12” (30cm)
	deck, or balcony
B = Clearance to window or door that may be		6” (15cm) for appliances	6” (15cm) for appliances
	opened	< 10,000Btuh (3kW), 12” (30cm)	< 10,000 Btuh (3kW), 9”
		for appliances > 10,000 Btuh (3kW) and	(23cm) for appliances > 10,000
		< 100,000 Btuh (30kW), 36” (91cm)	Btuh (3kW) and < 50,000 Btuh
		for appliances > 100,000 Btuh (30kW)	(15kW), 12” (30cm) for
			appliances > 50,000 Btuh (15kW)
C = Clearance to permanently closed window		12” (305mm) recommended to	12” (305mm) recommended to
		prevent window condensation	prevent window condensation
D = Vertical clearance to ventilated soffit located
	above the terminal within a horizontal	18” (458mm)	18” (458mm)
	distance of 2 feet (610mm) from the center
	line of the terminal
E = Clearance to unventilated soffit		12” (305mm)	12” (305mm)
F =	Clearance to outside corner	see next page	see next page
G = Clearance to inside corner (see next page)		see next page	see next page
H = Clearance to each inside of center line		3’ (91cm) within a height of 15’	3’ (91cm) within a height of 15’
	extended above meter/regulator assembly	above the meter/regulator assembly	above the meter/regulator assy
I =	Clearance to service regulator vent outlet	3’ (91cm)	3’ (91cm)
J =	Clearance to nonmechanical air supply inlet	6” (15cm) for appliances < 10,000	6” (15cm) for appliances
	to building or the combustion air inlet to any	Btuh (3kW), 12” (30cm) for	< 10,000 Btuh (3kW), 9”
	other appliances	appliances > 10,000 Btuh (3kW) and <	(23cm) for appliances > 10,000
		100,000 Btuh (30kW), 36” (91cm)	Btuh (3kW) and < 50,000 Btuh
		for appliances > 100,000 Btuh (30kW)	(15kW), 12” (30cm) for
			appliances > 50,000 Btuh (15kW)
K =	Clearance to a mechanical air supply inlet	6’ (1.83m)	3’ (91cm) above if within 10’
			(3m) horizontally
L =	Clearance above paved sidewalk or paved	7’ (2.13m)†	7’ (2.13m)†
	driveway located on public property
M = Clearance under veranda, porch, deck or		12” (30cm)‡	12” (30cm)‡
	balcony

N = Clearance above a roof shall extend a minimum of 24” (610mm) above the highest point when it passes through the roof surface, and any other obstruction within a horizontal distance of 18” (450mm).

1 In accordance with the current CSA-B149 Installation Codes

2 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Codes

†A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings

‡ only permitted if veranda, porch, deck or balcony is fully open on a minimum 2 sides beneath the floor: NOTE: 1. Local codes or regulations may require different clearances.

2.The special venting system used on Direct Vent fireplaces are certified as part of the appliance, with clearances tested and app- roved by the listing agency.

3.CFM Corporation assumes no responsibility for the improper performance of the appliance when the venting system does not meet these requirements.

Fig. 9 Termination clearances.

10 10001195