10
Specifications continued-
Table 4: Water Heater Performance
MODEL
Maximum First
Hour Rating
(Gal/Hr) @
140 °F 115 °F
Continuous
Draw Rating
(Gal/Min) @
140 °F 115 °F
Approximate
Boiler Output
Needed For
Ratings
(BTU/hr)
30-Gal. / Res.
279 429 4.2 6.7
220,000
40-Gal. / Res.
288 438 4.2 6.7
220,000
40-Gal. “R” / Res.
288 438 4.2 6.7
220,000
50-Gal. / Res.
297 447 4.2 6.7
220,000
50-Gal. “R” / Res.
297 447 4.2 6.7
220,000
65-Gal. / Res.
306 456 4.2 6.7
220,000
65-Gal. / Com.
534 820 8.0 12.8 420,000
80-Gal. / Res.
321 470 4.2 6.7
220,000
80-Gal. / Com.
546 834 8.0 12.8 420,000
120-Gal. / Res.
357 507 4.2 6.7
220,000
120-Gal. / Com.
583 871 8.0 12.8 420,000
NOTES: Based on 200 °F boiler water temperature and 50 °F potable
water inlet temperature.
Table 5: Water Heater Performance
MODEL
Hot Water
Availability
(Minutes)
Coil Heat
Transfer Area
(Sq Ft)
Pressure Drop at
Rated Heat Source
Flow Rate
(Feet of Head)
30-Gal. / Res.
5.5
14.2
1.5
40-Gal. / Res.
7.5
14.2
1.5
40-Gal. “R” / Res.
7.5
14.2
1.5
50-Gal. / Res.
9.0
14.2
1.5
50-Gal. “R” / Res.
9.0
14.2
1.5
65-Gal. / Res.
11.0
14.2
1.5
65-Gal. / Com.
10.5
27.2
5.0
80-Gal. / Res.
13.5
14.2
1.5
80-Gal. / Com.
13.2
27.2
5.0
120-Gal. / Res.
20.8
14.2
1.5
120-Gal. / Com.
20.6
27.2
5.0