Monessen Hearth WDV500 Vertical through-the-roof applications, Do not back fill around snorkel

WDV Series Gas Fireplace

venting installation

Foundation

Recess

Watertight Seal Around Pipe

Snorkel

Wall Screws

Sheet Metal

Screws

•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" (450 mm).

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

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

•	A minimum of an 12' (3.6 m) 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.

Figure 17 -

Snorkel Installation, Recessed Foundation

WARNING	•	Do not back fill around snorkel.
	•	A clearance of at least 4" must be
		maintained between the snorkel and
		the soil.

vertical (through-the-roof) applications

This gas fireplace has been approved for,

•Vertical installations up to 40' (12 m) in height. Up to a 10' (3 m) horizontal vent run can be installed within the vent system using a maximum of two 90° elbows. Figure 18

NOTE: Horizontal and vertical sections of this vent system require a minimum 1" clearance to combustibles at the top, sides and bottom.

40' Maximum Height

12' Minimum Height

10'

Maximum

12" Min.

Support Straps

Every 3'

FP1183

Figure 18 -

Support Straps for Horizontal Runs

Figure 19

• The maximum angular variation allowed in the

system is 270°. Figure 19

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

1

2

3

4

12" Min.

Figure 19 -	FP1179
Maximum Elbow Usage

16 78D0011