Century Jefferson manual Vertical Termination Direct Vent only, Vent Termination Clearances

Vertical Termination - Direct Vent ONLY

A vertical vent system must terminate no less than 8’ (2.44 m) and no more than 40’ (12 m) above the appli- ance flue collar. A 2¹⁄₄" restrictor plate (supplied) must be used, where specified, in all vertically terminated vent systems. (Refer to Figure 8) NOTE: The restrictor plate supplied with the vertical termination should be discarded. Install restrictor plate supplied with stove directly at stove outlet. A vertically terminated vent system must also conform to the following criteria:

•No more than two 90° elbows may be used.

•Two 45° elbows may be substituted for one 90˚ elbow. No more than six elbows may be used.

•Vent must rise a minimum of 2 feet before offset is used.

•Termination height must conform to roof clearance as specified in Figure 9.

	40
	39
	38	All Vertical Termi-
	37	nations in this area
	36
pipe.)		Require use of
	34
		the 2¹⁄₄” Restrictor
	35
vent	33	Plate*
the	32
	31
of
top	30
to the	29
	28
collar	27
feet)(in flue	25
	26
appliance		Vertical terminations
Run	24	must be within this area
Vertical the	23
	22
	21
from	20
	19
(Measure
	18
	16	Unacceptable
	15	Venting Configuration
	14
	13
	12
	11
	10
	9
	8
	7
	6
	5
	4
	3
	2

1No offset may be used

0 within this area

12 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Horizontal Run (in feet) ST132a

Fig. 8 Vertical vent termination window.

*The Restictor Plate is used on Direct Vent installations only.

Jefferson Direct Vent /Natural Vent Gas Heater

Vent Termination Clearances

When planning the installation, consider the location of the vent terminal and clearances. Some of the most common clearances to keep in mind are shown in Figure 9.

Important: All vent clearances must be maintained. Check your vent termination clearances against Figures 9 and 10.

The vent should be placed so that people cannot be burned by accidentally touching the vent surfaces when the stove is operating.

The vent termination should be located where it cannot be damaged by such things as automobile doors, lawn mowers or snowblowers and it should be located away from areas where it could become blocked by snow, etc.

Some considerations are:

•Obstructions or impediments to venting.

•Nearby combustible materials that could come into contact with combustion exhaust gases.

•Other nearby openings {within 9” (229 mm)} through which exhaust gas could reenter the building.

•All vegetation within 3’ (914 mm) that may interfere with the draft.

Other factors that influence where the installation will be sited include the location of outside walls, where additional heat may be desired in the home, where the family members gather most regularly, and perhaps most importantly, the distance limitations of the venting system.

IMPORTANT

Direct Vent Only

•The horizontal termination must not be recessed into the exterior wall or siding.

•Horizontal vent runs must be level toward the vent termination.

•Clearances around the vent termination must be maintained.

•For installations using Simpson DuraVent pipe, parallel installations with minimum wall clearance have restricted access for connecting the Hori- zontal Vent Cap straps to the vent pipe. See the maker’s instructions for recommended installa- tion procedures.

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