Vermont Casting 3960, SDVR, PDV20: 3920, 4075 Vertical Termination, Vent Termination Clearances

Pinnacle & Stardance Direct Vent - Rear Vent Gas Heaters

Vertical Termination

A vertical vent system must terminate no less than 8' (2.44m) and no more than 40’ (12m) above the appli- ance flue collar. A 2¹⁄₄" restrictor plate (supplied) must be used (where specified) in all vertically terminated vent systems. 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 three 90° elbows may be used. 90° elbow off back must be transition elbow.

•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	All Vertical
		38
			Terminations in
		37
		36	this area Re-
		35	quire use of the
		34
			2¹⁄₄” Restrictor
		33
		32	Plate*
	elbow)	31
		30
		29
	(Transition
feet)		28
		27
		26
Run (in	first elbow.			Vertical terminations
		25
			must be within this area
		24
		23
Vertical	(Measured after the
		22
		21
		20
		19
		18
		16												Unacceptable
		15
												Venting				Configuration
		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) ST132f

Fig. 8 Vertical vent termination window.

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

•All vegetation within 3' (914mm) 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

•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.

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