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Table SP-3 – Model S Horizontal Unit Heater Steam Capacities
2 Lbs. Steam 60 F Entering Air Temp
Motor
Motor
Size
HP
RPM
1050
18-S
1/50
950
800
1050
20-S2
1/50
950
800
1550
38-S
1/20
1300
1100
1550
42-S
1/20
1300
1100
1550
60-S
1/20
1300
1100
1550
70-S
1/8
1300
1100
1550
90-S
1/8
1300
1100
1550
1300
100-S
1/8
1100
126-S
1/6
1100
168-8
1/6
1100
186-S
1/4
1100
230-S
1/4
1100
260-S
1/2
1100
320-S
1/2
1100
354-8
1/2
1100
400-S
3/4
1145
Notes:
1. Constant speed units are rated at capacities shown in regular type: Capacities in italic faced type apply only to
units with multi-speed motors.
2. Capacities based on 2 psi steam and 60 F entering air.
UH-PRC001-EN
Selection
Procedure
BTU
Condensate
Per Hour
EDR
Lbs Per Hr
Standard Units
17 ,400
72
16,600
69
13,900
58
20,000
84
19,000
79
15,500
64
38,700
162
35,900
150
32,700
136
41,600
174
38,000
158
34,700
145
60,500
252
56,000
234
51,200
214
68,200
285
64,900
271
59,700
248
87 ,600
366
81,200
340
74,200
310
96,000
400
91,500
380
84,000
350
125,700
525
172,000
716
185,200
775
229,700
957
256,300
1070
324,000
1350
355,500
1480
404,073
1684
Final
CFM 70 F
Temp
Air Basis
18
117
280
17
118
266
14
118
224
21
118
318
20
120
298
17
120
250
40
126
544
37
130
472
33
135
399
43
125
590
39
130
495
35
136
420
64
129
815
58
133
706
52
139
597
70
117
1100
67
123
953
61
128
806
90
127
1214
84
131
1053
76
137
891
99
118
1535
94
123
1330
86
128
1126
130
126
1760
178
127
2380
191
121
2808
237
124
3300
265
118
4100
335
127
4480
368
118
5660
418
122
6017
Outlet
Oper.
Velocity
Weight
162
154
40
130
186
173
40
145
319
279
40
238
347
294
40
251
343
300
55
256
454
397
60
339
382
334
75
285
476
417
85
356
411
100
452
145
528
145
431
190
529
195
442
245
550
250
583
260
15
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