Monessen Hearth BDV400 Vertical THROUGH-THE-ROOF Applications, Support Straps for Horizontal Runs

VENT INSTALLATION

VERTICAL (THROUGH-THE-ROOF) APPLICATIONS

This Gas Fireplace has been approved for,

•Vertical installations up to 40' (12m) in height. Up to a 10' (3m) horizontal vent run can be installed within the vent system using a maximum of two 90° elbows. See Figure 28.

NOTE: Horizontal sections of this vent system require a minimum of 3" clearances to combustibles at the top of the flue and 1" clearance at the sides and bottom until the flue penetrates the outside wall. A minimum 1" clearance all around the flue is acceptable at this point of penetration.

Vertical sections of this vent system require a minimum of									10'
1" clearance to combustibles on all sides of the pipe.						40' Maximum Height
								Maximum
					Support	8' Minimum Height
							Support Straps
				10'	Straps
								Every 3'
					Every
		Maximum
					5'Vertical
40' Maximum Height	Support Straps
8' Minimum Height
			Every 3'		Figure 28 - Support Straps for Horizontal Runs

•Up to two 45° elbows may be used within the horizontal run. For each 45° elbow used on the horizontal plane, the maximum horizontal length must be reduced by 18" (450mm).

Example: Maximum horizontal length No elbows = 10’ (3m)

1x45° elbows = 8.5’ (2.6m) 2x45° elbows = 7’ (2.1m)

•A minimum of an 8' (2.5m) vertical rise is required.

•Two sets of 45°elbows offsets may be used within the vertical sections. From 0 to a maximum of 8' (2.5 m) of vent pipe can be used between elbows. See Figure 29.

•The maximum angular variation allowed in the system is 270°. See Figure 29.

1

2

3

4

1

2

Example:	Elbow 1	=	90°
	Elbow 2	=	45°	3
	Elbow 3	=	45°	4
	Elbow 4	=	90°
Total Angular Variation		=	270°

Figure 29 - Maximum Elbow Usage

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