Vertical/Horizontal Termination Configuration - Monessen Hearth BLDV400 Installation And Operating Instructions Manual

VERTICAL/HORIZONTAL TERMINATION
CONFIGURATIONS
Since it is very important that the venting system maintain its balance between the combustion air intake
and the flue gas exhaust, certain limitations as to vent configurations apply and must be strictly adhered
to.
The Vent Graph, showing the relationship between vertical and horizontal side wall venting, will help to determine
the various dimensions allowable. Figure 10
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. If the vertical run is 7
on all sides of the horizontal run.
Vertical sections of this vent system require a minimum of 1" clearance to combustibles on all sides of the pipe.
When vent exits through foundations less than 20" below outcrop, the termination must be flush up with out-
cropped wall above.
It is best to locate the fireplace in such a way that minimizes the number of offsets and horizontal vent length.
The horizontal vent run refers to the total length of vent pipe from the flue collar of the fireplace (or the top of the
Transition Elbow) to the face of the finished outside wall.
• The maximum number of 90° elbows per side wall installation is three (3). Figure 16
• A minimum of 12" is required before a 90° elbow. If a 90° elbow is fitted directly after 12" vertical section
mounted to the top of the fireplace, the maximum horizontal vent run before the termination or a vertical rise
is 24" (914 mm). Figure 17
3 x 90°
Elbows
12" Min.
Figure 16 - Maximum Three (3) 90° Elbows
Per Installation
74D0009
24"
Max.
12" Min.
Figure 17 - Maximum Horizontal Run with No Rise
VENT INSTALLATION
1 / ft. or more, the clearance is 1"
2
24"
Max.
19