5
Table 3: TH Service Clearances
Input [BTU/hr]
Service Clearance, Inches (cm)
Front
Top
Right Side
Left Side
Rear
80,000
24” (61cm)
18” (46cm)
0” (0cm)
24” (61cm)
12” (31 cm)
100,000
24” (61cm)
18” (46cm)
0” (0cm)
24” (61cm)
12” (31 cm)
150,000
24” (61cm)
18” (46cm)
0” (0cm)
24” (61 cm)
12” (31cm)
199,000
24” (61cm)
18” (46cm)
0” (0cm)
24” (61 cm)
12” (31 cm)
250,000
24” (61cm)
18” (46cm)
0” (0cm)
24” (61 cm)
12” (31 cm)
299,000
24” (61cm)
18” (46cm)
0” (0cm)
24” (61 cm)
12” (31cm)
399,000
24” (61cm)
18” (46cm)
0” (0cm)
24” (61 cm)
12” (31 cm)
500,000
24” (61cm)
18” (46cm)
0” (0cm)
24” (61 cm)
12” (31 cm)
Figure 2: TH Model Dimensions
Table 4: Appliance Dimensions and Specifications
Input
[BTU/hr]
Dim.
"A"
[in.]
Dim.
"B"
[in.]
Dim.
“C”
[in.]
Dim.
“D”
[in.]
Dim.
“E”
[in.]
Dim.
“F”
[in.]
Dim.
“G”
[in.]
Dim.
“H”
[in.]
Equivalent Length of Vent &
Air Intake Pipes at
Recommended Diameter, [in.]
Water
Conn.
at
Boiler
[in.]
NPT
Gas
Conn.
at
Boiler
[in.]
NPT
Category IV
CAT.II
Comb.
Vents
Over
25'
and
up to
100'
Over
15'
and
up to
25'
Up
to
15'
80,000
53
22 1/4
46 1/4
46 3/8
47 1/2
8 3/4
9 7/8
7 3/8
3
3
2
-
1
1/2
100,000
53
22 1/4
46 1/4
46 3/8
47 1/2
8 3/4
9 7/8
7 3/8
3
3
2
-
1
1/2
150,000
53
22 1/4
46 1/4
46 3/8
47 1/2
8 3/4
9 7/8
7 3/8
3
3
2
-
1
1/2
199,000
53
31 1/4
37 3/4
46 3/8
47 1/2
12 1/8
9 7/8
7 3/8
3
3
2
4
1
1/2
250,000
53
31 1/4
37 3/4
46 3/8
47 1/2
12 1/8
9 7/8
7 3/8
3
3
2
4
1 1/4
1/2
299,000
65 1/2
31 1/4
37 1/2
58 3/8
53 7/8
12 1/8
11 3/8
8 7/8
4
3
3
5
1 1/4
3/4
399,000
65 1/2
31 1/4
37 1/2
58 3/8
53 7/8
12 1/8
11 3/8
8 7/8
4
3
3
5
1 1/2
1
500,000
65 1/2
31 1/4
37 1/2
58 3/8
53 7/8
12 1/8
11 3/8
8 7/8
4
3
3
6
1 1/2
1
