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GALAXY
BOILER DIMENSIONS
FRONT VIEW
All GG and GX(H)
RIGHT SIDE
GG / GX(H)-PT
RIGHT SIDE
GX(H)-PZT-PPZT
RIGHT SIDE
GX(H)-PZ
GG SERIES HOT WATER BOILERS - DIMENSIONS IN INCHES
A
B
C
D
E
F
G
H
J
K
GG-75H GG-100H GG-125H GG-150H GG-175H GG-200H GG-225H GG-250H GG-275H GG-300
23
261⁄2
193⁄4
193⁄4
193⁄4
23
261⁄2
293⁄4
293⁄4
331⁄4
131⁄4
131⁄4
131⁄4
161⁄2
161⁄2
20
20
231⁄4
231⁄4
263⁄4
5
6
6
6
6
7
7
8
8
8
463⁄8
531⁄4
531⁄4
531⁄4
531⁄4
571⁄2
571⁄2
595⁄8
595⁄8
595⁄8
3
6 ⁄4
13
13
13
13
16
16
17
17
17
8
8
8
93⁄4
93⁄4
111⁄4
111⁄4
13
13
143⁄4
11⁄4
11⁄4
11⁄4
11⁄4
11⁄4
11⁄4
11⁄4
11⁄2
11⁄2
11⁄2
11⁄2
11⁄2
11⁄2
11⁄2
11⁄2
11⁄2
11⁄2
11⁄2
11⁄2
11⁄2
23⁄4
23⁄4
23⁄4
23⁄4
23⁄4
23⁄4
23⁄4
23⁄4
23⁄4
23⁄4
91⁄4
91⁄4
91⁄4
91⁄4
91⁄4
91⁄4
91⁄4
91⁄4
91⁄4
91⁄4
A
B
C
D
E
F
G
H
J
K
L
M
GXHA-100 GXH-105 GXHA-120 GXH-125
–
23
–
23
161⁄2
161⁄2
161⁄2
161⁄2
5
5
5
6
–
–
463⁄8
531⁄4
3
–
6 ⁄4
–
13
10
93⁄4
10
93⁄4
1
–
1 ⁄4
–
11⁄4
–
21⁄2
–
21⁄2
–
–
31⁄2
31⁄2
–
93⁄4
–
93⁄4
1
1
–
⁄2
–
⁄2
285⁄8
–
285⁄8
–
GG-325
331⁄4
263⁄4
8
661⁄8
17
143⁄4
11⁄2
11⁄2
23⁄4
91⁄4
GG-350
361⁄2
30
9
661⁄8
221⁄2
161⁄4
11⁄2
11⁄2
23⁄4
91⁄4
GG-350H GG-375H GG-399H
361⁄2
361⁄2
361⁄2
30
30
30
9
10
10
661⁄8
595⁄8
625⁄8
221⁄2
15
18
161⁄4
161⁄4
161⁄4
11⁄2
11⁄2
11⁄2
11⁄2
11⁄2
11⁄2
23⁄4
23⁄4
23⁄4
91⁄4
91⁄4
91⁄4
GX, GXH AND GXHA SERIES STEAM AND HOT WATER BOILERS - DIMENSIONS IN INCHES
GXH-150 GXHA-160 GXH-170
261⁄2
–
261⁄2
20
20
20
7
6
7
1
55 ⁄2
–
551⁄2
14
–
14
111⁄4
113⁄4
111⁄4
1
1 ⁄4
–
11⁄4
21⁄2
–
21⁄2
31⁄2
–
31⁄2
93⁄4
–
93⁄4
1
1
⁄2
–
⁄2
–
285⁄8
–
GXH-190 GXHA-200 GXH-210
261⁄2
–
293⁄4
20
231⁄4
231⁄4
7
7
7
551⁄2
–
551⁄2
14
–
14
111⁄4
131⁄2
111⁄4
1
1 ⁄2
–
11⁄2
21⁄2
–
21⁄2
31⁄2
–
31⁄2
93⁄4
–
93⁄4
1
3
⁄2
–
⁄4
–
285⁄8
–
GX-225
293⁄4
231⁄4
8
565⁄8
14
13
11⁄2
21⁄2
31⁄2
93⁄4
3
⁄4
–
GXH-230
293⁄4
231⁄4
7
551⁄2
14
13
11⁄2
21⁄2
31⁄2
93⁄4
3
⁄4
–
GX-250
293⁄4
231⁄4
8
565⁄8
14
13
11⁄2
21⁄2
31⁄2
93⁄4
3
⁄4
–
GXH-250 GXH-275 GXH-300H
321⁄2
321⁄2
321⁄2
26
26
26
7
7
9
1
1
55 ⁄2
55 ⁄2
591⁄8
14
14
15
143⁄4
143⁄4
143⁄4
1
1
1 ⁄2
1 ⁄2
11⁄2
21⁄2
21⁄2
21⁄2
31⁄2
31⁄2
31⁄2
93⁄4
93⁄4
93⁄4
3
3
3
⁄4
⁄4
⁄4
–
–
–
GXHA Series
ORIFICE SIZES AT HIGH ALTITUDES
INCLUDES 4% INPUT REDUCTION FOR EACH 1000 FEET
ORIFICE SIZES indicated for Sea Level are factory installed in
boiler unless otherwise specified by the local authority.
See VII, page 12 for burner input adjustment.
GAS VALVE CONNECTION Size is 1/2" f.p.t. for all sizes up to and
including GG-225 and GX-225. Larger boilers, gas valves may be 3/4" or
1/2" depending upon configuration (natural, L.P., standing pilot, IID).
COMBUSTIBLE FLOOR KIT increases all height dimensions by 1".
RAISED SLAB - When mounting boiler on a raised slab, the slab
must extend at least 2" beyond the boiler cabinet on all sides.
CHIMNEY HEIGHT: 15 ft. minimum from draft hood skirt to top of
chimney. CHIMNEY INSIDE DIAMETER must be same as Dimension “C” or larger. Larger diameter and/or height may be required if
two or more boilers or a boiler and another appliance are vented to
a single chimney.
BOILER MODEL
GG/GX
GAS TYPE
Natural
Except GG-399H Propane
Natural
GG-399H
Propane
GXH-105
Natural
through 275
Propane
Natural
GXH-300
Propane
GXH-300H
Natural
GG-350H
Gas*
Natural
GXHA
Propane
Orifice
Size for
Sea Level
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
42
54
40
53
44
54
43
54
43
54
41
54
45
54
44
54
43
55
42
54
45
55
44
55
43
55
42
54
45
55
44
55
43
55
42
54
46
55
45
55
44
55
43
54
47
55
45
55
44
55
43
54
47
55
46
55
45
56
44
55
48
56
47
56
46
56
44
55
48
56
47
56
47
56
45
55
49
56
48
56
43
45
55
44
46
55
44
47
55
44
47
55
45
47
56
45
48
56
46
48
56
47
49
56
47
49
56
48
50
57
*For L.P. Propane gas, consult factory.
ELEVATION–FEET