Century Jefferson manual Venting Requirements Natural Vent Only, Termination Clearances

Jefferson Direct Vent/Natural Vent Gas Heater

Termination Clearances

Termination clearances for buildings with combustible and noncombustible exteriors.

Inside Corner Outside Corner Alcove Applications*

			F =
	G =		Combustible
G	Combustible		6"	(152 mm)
	6" (152 mm)	V	Noncombustible
			2"	(51 mm)
	Noncombustible
V			F
	2" (51 mm)

Balcony -	Balcony -
with no side wall	with perpendicular side wall

M	M
V	V
	P
M =	Combustible &
	Noncombustible
Combustible &
	M = 24" (610 mm)
Noncombustible
	P = 20” (508 mm)
12" (305 mm)

D

C C

V

E

O

E = Min. 6” (152 mm) for non-vinyl sidewalls Min. 12” (305 mm) for vinyl sidewalls

O = 8’ (2.4 m) Min.

No.
of Caps	DMin.	CMax.

13’ (914 mm) 2 x DActual

2	6’ (1.8 m)	1 x DActual
3	9’ (2.7 m)	2/3 x DActual
4	12’ (3.7 m)	1/2 x DActual

DMin. = # of Termination caps x 3

CMax. = (2 / # termination caps) x DActual

584-15

*NOTE: Termination in an alcove space (spaces open only on one side and with an overhang) is permitted with the dimensions specified for vinyl or non-vinyl siding and soffits. 1. There must be a 3’ (914 mm) minimum between termination caps. 2. All mechanical air intakes within 10’ (1 m) of a termination cap must be a minimum of 3’ (914 mm) below the termination cap. 3. All gravity air intakes within 3’ (914 mm) of a termination cap must be a minimum of 1’ (305 mm) below the termination cap.

Fig. 10 Termination clearances.

Venting Requirements - Natural Vent Only

	36
	34
				A
	32
				B
to	30
feet)(inRunVertical offloorfrom(Measuredunit cap.)ventoftop	28
	26
	24
	22
	20
	18
	16
	14
	12
	10
	8
	4	6	8		10	12 1416 18 20 22 24 26 28 30 32 34 36

Venting Runs

= Acceptable venting configuration = Unacceptable venting configuration

A: Vertical installations up to 36' (12m) in height. Up to an 18' horizontal vent run can be installed within the vent system using a maximum of two 90-degree elbows or four 45-degree elbows.

B:Vertical installations up to 36' (12m) in height. Up to a 24' horizontal vent run can be installed within the vent system using a maximum of two 45-degree elbows.

(Ratio = 2/3, Hor./Vert.)

Horizontal Run (in feet)

FP567b

Fig. 11 Vent termination window - Natural Vent ONLY.

NOTE: When using the FSDHAG, the restrictor plate supplied with the stove is not used.

1212 30004177