Installation & Operation Manual
19
8 Performance data
Squire Indirect Water Heater
I=B=R Rating
Indirect
Water
Heater
Model
Number
Potable
Water
Volume
Gal.
Heat
Source
Water
Volume
Gal.
Standby
Heat Loss
F/hr
Continuous
Draw Rating
Gal/hr
First Hour
Rating Gal/
hr
Minimum Heat
Output Rate
from
Heat Source
Btu/hr
Minimum
Heat Source
Flow Rate
GPM
Tank Heat
Source
Friction
Loss Feet
W.C.
SIT030
27.0 1.1 1.5 160 183 99,000 14.0 3.9
SIT040
40.0 1.6 0.9 181 208 115,000 14.0 4.5
SIT050
51.6 1.7 0.8 209 255 133,000 14.0 5.3
SIT065
67.0 1.9 0.7 263 327 154,000 14.0 5.7
SIT080
81.5 2.1 0.6 266 347 160,000 14.0 5.7
SIT119
113.4 3.2 0.5 349 459 216,000 14.0 6.5
Table 8A IBR Chart
• These ratings were obtained with a heat source output and heat source flow rate as listed in the chart using the parameters of the
Domestic Cold Water Inlet at 58°F, Domestic Temperature Rise of 77°F, and a Boiler Temperature Output of 180°F. Other results
will be obtained under different conditions.
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