Vermont Casting 2823, 820, 2828, 2825 Restictor Plate is used on Direct Vent installations only

Vermont Castings Jefferson Direct Vent/Natural Vent Gas Heater

Vertical Termination - Direct Vent ONLY

Vent Termination Clearances

A vertical vent system must terminate no less than 8' (2.44m) and no more than 40Õ (12m) 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 the stove directly at stove outlet. A vertically terminated vent system must also conform to the following criteria:

¥No more than two 90û elbows may be used.

¥Two 45û elbows may be substituted for one 90û 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	ALL VERTICAL
		38	TERMINATIONS
		37
			REQUIRE USE
		36
	pipe.)	35	OF THE 2¹⁄₄Ó
		34	RESTRICTOR
	vent	33
			PLATE*
		32
	the
		31
	of
	top	30
	to the	29
		28
(in feet)	flue collar	27
		26
		25		Vertical terminations
Vertical Run	the appliance
		24	must be within this area
		23
		22
		21
	from	20
		19
	(Measure
		18													Unacceptable
		16
													Venting Configuration
		15
		14
		13
		12
		11
		10
		9
		8
		7
		6
		5
		4
		3
		2
		1
		0
			1	2	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.

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 10.

Important: All vent clearances must be maintained. Check your vent termination clearances against Figures 10 and 11.

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" (230mm)} through which exhaust gas could reenter the building.

¥All vegetation within 3' (.9m) that may interfere with the draft.

Other factors that influence where the installation will be sited include the location of outside walls, where addi- tional 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 Horizon- tal Vent Cap straps to the vent pipe. See the makerÕs instructions for recommended installation procedures.

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