Laars INDIRECT-FIRED, Installation And Operating Manual, Page: 9 / 36

9
Specifications continued-
Table 2: Water Heater Capacities
MODEL
Tank
Capacity
(Gal)
Coil
Volume
(Gal)
Dry Weight
(Lbs)
Wet Weight
(Lbs)
30-Gal. / Res.
30 2.7 140 404
40-Gal. / Res.
40 2.7 172 500
40-Gal. “R” / Res.
38 2.7 172 486
50-Gal. / Res. 50 2.7 196 610
50-Gal. “R” / Res. 48 2.7 180 576
65-Gal. / Res. 60 2.7 196 704
65-Gal. / Com.
58 5.0 265 768
80-Gal. / Res.
75 2.7 224 861
80-Gal. / Com.
73 5.0 293 920
120-Gal. / Res.
116 2.7 355 1324
120-Gal. / Com.
114 5.0 415 1370
Table 3: Water Heater Ratings
MODEL
First Hour
Rating
(Gal/Hr)
Continuous
Draw Rating
(Gal/Hr)
Standby
Heat Loss
Rating
(°F/Hr)
Minimum Heat
Output Rate of
the Heat Source
(BTU/Hr)
Minimum
Heat Source
Flow Rate
(Gal/Min)
30-Gal. / Res.
255 235 1.2 157,000 13.7
40-Gal. / Res.
260 235 1.1 157,000 13.7
40-Gal. “R” / Res.
260 235 1.1 157,000 13.7
50-Gal. / Res.
265 235 0.9 157,000 13.7
50-Gal. “R” / Res.
265 235 0.9 157,000 13.7
65-Gal. / Res.
275 235 0.8 157,000 13.7
65-Gal. / Com.
405 370 0.8 245,000 14.0
80-Gal. / Res.
295 235 0.6 157,000 13.7
80-Gal. / Com.
415 370 0.6 245,000 14.0
120-Gal. / Res.
315 235 0.4 157,000 13.7
120-Gal. / Com.
445 370 0.4 245,000 14.0
NOTES: These ratings were obtained with a heat source output rate
and flow rate as specified in Table 3 and a 180°F boiler water supply
temperature. Other results will be obtained under different conditions.