UF Series "Flex-Tube" Hot Water Boilers
Dimensional Data
Components
Physical Data
Boiler
Model #
UFH-11-50
UFH-12-60
UFH-13-80
UFH-14-100
UFH-15-125
UFH-15-150
UFH-20-150
UFH-21-175
UFH-
22-200
UFH-
23-250
UFH-24-300
UFH-
25-350
Nominal HP
50
60
80
100
125
150
150
175
200
250
300
350
Input (MBH)
2100
2520
3360
4200
5250
6300
6300
7350
8400
10500
12600
14700
Output (MBH)
1720
2070
2760
3440
4310
5170
5170
6030
6890
8610
10330
12050
Ship Weight (lbs)
4200
4600
5400
6200
7300
8300
8700
9700
10700
12200
13700
15200
Oper Weight (lbs)
4750
5210
6190
7160
8470
9680
10190
11390
12580
14420
16270
18100
Water Content (Gal)
66
74
95
116
141
166
180
204
227
268
310
350
A. Casing Length (in)
58
64
79
94
112
130
102
114
126
147
168
190
B. Overall Length* (in)
92
107
127
142
164
182
156
168
180
201
222
244
C. Casing Height (in)
76
76
76
76
76
16
90
90
90
90
90
90
D. Casing Width (in)
53
53
53
53
53
53
64
64
64
64
64
64
E. Flue Diameter (in)
10
12
12
14
16
16
16
18
18
20
20
24
F. Flue Location (in)
12
13
13
14
15
15
15
16
16
17
17
19
G. Return/Supply Size (in)
4F**
4F
4F
6F
6F
6F
8F
8F
8F
8F
8F
8F
H. Drain Size (NPT) (in.)
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
2
2
2
2
2
2
J. Header Location
8
8
8
8
8
8
8
8
8
8
8
8
Boiler Model #
UFH-30-350
UFH-31-400
UFH-32-450
UFH-33-500
UFH-34-600
UFH-40-500
UFH-41-500
UFH-42-700
UFH-43-800
UFH-51-900
UFH-52-1000
UFH-53-1200
Nominal HP
350
400
450
500
600
500
500
700
800
900
1000
1200
Input (MBH)
14700
16800
18900
21000
25,200
2100
25200
29400
33600
37800
42000
50400
Output (MBH)
12050
13780
15500
17220
20660
17220
20660
24110
27550
31000
34440
41330
Ship Weight (lbs)
16000
17500
19000
20500
23500
22200
24500
26800
29200
31600
34400
39000
Oper Weight (lbs)
19080
20950
22830
24710
28450
28010
31120
34220
37480
40390
44130
50170
Water Content (Gal)
371
416
462
507
596
700
798
894
997
1059
1172
1346
A. Casing Length (in)
160
178
196
214
250
187
211
235
259
243
263
303
B.
Overall Length* (in)
214
232
250
268
304
256
380
304
328
312
342
382
C.
Casing Height (in)
105
105
105
105
105
115
115
115
115
125
125
125
D.
Casing Width (in)
76
76
76
76
76
90
90
90
90
122
122
122
E.
Flue Diameter (in)
24
24
28
28
32
28
32
32
32
36
36
36
F.
Flue Location (in)
19
19
21
21
23
21
23
23
23
25
25
25
G. Return/Supply Size (in)
10F**
10F
10F
10F
10F
12F
12F
12F
12F
12F
12F
12F
H.
Drain Size (NPT) (in.)
2
2
2
2
2
2
2
2
2
2
2
2
J. Header Location (in)
12
12
12
12
12
14
14
14
14
14
14
14
*Overall length is
approximate and is dependent on length of actual burner
used. **Indicates Flanged Connection (150# RF).
#Suffix Model Number by desired max operating pressure and
burner designation (e.g., MCH-12-15-50-PF-P = 15 BPH/50
psi trim/Power Flame Burner/Propane).
