àx fxÜ
Minimum clearance to combustibles on venting is 1” with
the following exceptions:
MQRB4436
MQRB5143
MQRB6961
Top of horizontal 2” 2” 2”
Top of 90 degree elbow in an enclosure under 72” 5” with Z57WTS 5” with Z57WTS N/A
Top of 90 degree elbow in an enclosure over 72” 4” 4” N/A
Top of 90 degree elbow in an enclosure under 78” N/A N/A 6-1/2” with Z57WTS
Top of 90 degree elbow in an enclosure over 78” N/A N/A 6-1/2”
Minimum Enclosure Height (See Enclosure Heights page)
60” 60”
64” Vertical
68” Horizontal
Minimum Termination Height from bottom of Unit 37-1/2” + ¼” rise/ ft 51-1/2” + ¼” rise/ ft 56-1/2” + ¼” rise / ft
Horizontal Vent Table
To use the Horizontal Vent Table (see Table 1), determine the total vertical height of the system and the number of bends
required. Locate the value on the first column and then move across to see the corresponding maximum allowable horizontal
run. All Measurements are from the bottom of the appliance.
Total Vertical
Max. Horizontal
Total
Vertical
Max. Horizontal
Feet Meters Feet Meters Feet Meters Feet Meters
37-1/2"
51-1/2”
56-1/2”
1
1.3
1.4
3 .91
MQRB4436
MQRB5143
MQRB6961
4*
1.2* 4* 1.2*
14
4.3
20
6.1
5
1.5 5 1.5 15 4.6 20 6.1
6
1.8 8 2.4 16 4.9 20 6.1
7
2.1 15 4.6 17 5.2 20 6.1
8
2.4 20 6.1 18 5.5 20 6.1
9
2.7 20 6.1 19 5.8 20 6.1
10
3.0 20 6.1 20 6.1 20 6.1
11
3.4 20 6.1 25 7.5 15 4.6
12
3.7 20 6.1 30 9.0 10 3.0
13
4.0 20 6.1
43 12.2 0 0
Table 1 - Horizontal Vent Table
Figure 1
A Safety Cage is required if the Horizontal Termination is accessible.
MQRB5143 / MQRB4436: See Flue Restrictor Adjustment Page for vertically vented Installations.
NOTE: The final location of the fireplace must be such that the horizontal vent dimensions fall within those stated on the graph.
The Maximum Vertical vent run is 43ft. Please refer to Clearance to Combustibles information in this manual.
8ft
MQRB6961: Note Clearances of Termination from vented
and unvented soffit (24”) and adjacent Side wall (6”). Also
see D and E on Venting page.
For Propane Horizontal installations the venting must be a minimum of two feet vertical off the flue
before going horizontal.
*4436MQRB
Only
83