Tank Heater Recovery Table

Recovery in Gallons Per Hour (GPH) per Sq. Ft. of Heating Surface
Temp Rise Heat With Hot Water* Heat with Steam (Steam Pressure in Lbs. per Sq. Inch)
InletOutlet180°F210°F0 psi2 psi5 psi10 psi15 psi20 psi30 psi40 psi50 psi75 psi100 psi
40
80
100
120
140
160
180
38
23
15
10
6
–
63
39
26
19
14
10
72
44
31
22
16
11
77
48
33
24
17
13
83
52
36
26
19
14
91
57
40
29
22
17
98
62
43
32
25
19
104
66
46
34
26
21
116
73
52
39
30
24
126
80
57
43
33
27
133
86
60
46
36
29
151
97
69
53
42
34
166
106
77
58
46
38
50
80
100
120
140
160
180
48
26
16
11
7
–
81
45
29
20
14
10
93
52
34
24
17
12
99
55
36
26
18
13
107
60
40
28
21
15
118
66
44
32
23
18
128
72
48
35
26
20
136
77
52
37
28
22
151
86
58
42
32
25
164
94
63
46
36
28
174
100
68
50
38
30
198
114
78
57
45
35
217
125
88
64
50
40
60
80
100
120
140
160
180
65
31
18
11
7
–
112
54
33
22
15
10
135
63
38
26
18
12
145
67
41
28
20
14
156
73
45
31
22
16
172
81
50
35
25
18
187
88
55
38
28
21
198
94
59
41
30
23
221
106
66
46
35
26
241
115
72
51
38
30
256
122
77
55
41
32
291
139
89
63
48
38
320
154
98
70
54
42
70
100
120
140
160
180
39
20
12
7
–
69
38
24
16
11
80
44
28
19
13
86
47
31
21
14
94
52
34
23
17
104
58
38
27
19
114
64
42
30
22
122
68
45
32
24
137
77
52
37
28
149
85
57
41
31
159
91
61
45
34
182
104
71
52
40
201
116
79
58
45
80
100
120
140
160
180
52
24
13
7
–
85
45
27
17
11
118
53
31
20
13
125
57
34
23
15
136
63
38
25
17
152
71
43
29
21
166
77
48
33
23
177
83
51
35
28
200
94
59
41
30
219
103
65
45
34
233
111
70
49
37
268
128
81
57
43
296
142
90
64
49
90
120
140
160
180
30
15
8
–
57
30
19
12
68
36
22
14
73
40
25
16
81
44
28
19
91
50
32
22
100
55
36
25
108
60
39
28
122
69
45
32
134
76
51
36
144
82
55
40
167
95
64
47
185
106
72
53
100
120
140
160
180
39
17
8
–
78
36
20
12
97
43
25
15
105
47
28
17
115
53
31
20
132
50
36
24
145
67
41
27
156
72
44
30
178
83
51
35
196
92
57
40
211
99
62
43
244
116
73
52
272
130
82
58
*Based on 20°F temperature drop
To Use This Table:
  1. Locate desired temperature rise in left hand column
  2. Locate column with appropriate heating medium.
  3. Divide the total GPH req’mt by the recovery of 1 ft2.
  4. Select a coil with adequate heating surface.
Notes
  1. Recovery rates include a .001 fouling factor
  2. Recovery rates based on 3/4″ x .042″ copper tubing
  3. Insure adequate condensate drainage for steam coils.