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Specifications continued-
Table 2: Water Heater Capacities
MODEL
40-Gal.
52-Gal.
75-Gal.
120-Gal.
Table 3: AHRI Certified Water Heater Ratings
MODEL
40-Gal.
52-Gal.
75-Gal.
120-Gal.
NOTE: These certified ratings were obtained with a heat source
output and flow rate as specified in Table 3 and a 180°F boiler water
supply temperature. Other results will be obtained under different
conditions.
Table 4: Water Heater Performance
MODEL
40-Gal.
52-Gal.
75-Gal.
120-Gal.
NOTE: Based on 200°F boiler water temperature and 50°F potable
water inlet temperature.
Tank Cap.
Coil Cap.
(Gal)
40
52
75
119
Continuous
First
Draw
Hour
Rating
Rating
(Gal/Hr)
(Gal/Hr)
158
133
200
165
225
165
360
280
Maximum First
Hour Rating
(Gal/Hr) @
140 °F
115 °F
209
279
276
369
293
385
517
683
Dry Weight
(Gal)
(Lbs)
1.2
90
1.6
100
1.6
125
4.6
270
Standby
Heat
Loss
Heat Source
Rating
(°F/Hr)
0.9
0.7
0.5
0.6
Continuous
Draw Rating
(Gal/Min) @
140 °F 115 °F
3.0
4.2
4.0
5.5
4.0
5.5
7.2
10.0
10
Wet Weight
(Lbs)
415
525
745
1257
Minimum
Minimum
Output of
Heat
Source
(BTU/Hr)
Flow Rate
(Gal/Min)
87,500
8.0
113,000
8.0
113,000
8.0
195,000
11.0
Approximate
Boiler Output
Needed For
Ratings
(BTU/hr)
136,000
180,000
180,000
325,000
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