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Table 4– Max Suggested Firing rate for a Given Combustion Chamber Size
Firing
Rate
Square Chamber
(gal/hr)
0.75
1.00
1.25
1.35
1.50
1.65
1.75
2.00
2.50
3.00
3.50
4.00
4.50
5.00
6.00
24 x 1/2" x 24 1/2"
*-
Chamber size not recommended with given firing rate
Diameter
Chamber
*
*
*
*
*
*
*
*
*
15 1/2" x 15 1/2"
17 3/4" x 17 3/4"
19" x 19"
20" x 20"
23 1/4" x 23 1/4"
Rectangular
Round
Chamber
10"
8" x 9"
11"
10" x 10"
12"
11" x 11"
12"
11" x 11"
13"
11" x 12"
14"
12" x 13"
14"
12" x 13"
15"
13" x 14"
17"
14" x 16"
17 1/2"
13" x 18 1/2"
20"
15" x 23"
23 1/2"
16" x 22 1/2"
*
17" x 23 1/2"
*
18" x 25"
*
23" x 28 1/2"
35
Rect.
Nozzle
Chamber
Distance
Height
to Floor
9"
4"
10"
4 1/2"
11"
5"
11"
5"
12"
5"
13"
5"
13"
5"
13 1/2"
5 1/2"
14"
5 1/2"
14"
7"
15"
7 1/2"
16"
8"
17"
8 1/2"
18"
9"
20"
10"
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