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Table 4: Water Heater Performance (continued)
NOTICE
If the boiler takes longer to heat up from a cold start than
the water availability as noted above, hot water shortage
may occur.
Hot water availability is based off drawing 80% of the
heated tank volume at 4 gallons per minute flow rate.
The maximum heat transfer through the coil (heat input) of
the water heater at 240°F boiler water supply temperature
and 210°F potable water temperature is 94,100 Btu/hr for
residential models and 180,300 Btu/hr for commercial
models. Potable water temperature is limited to below
210 °F and nominal water-containing capacity is below
120 gallons for all single-wall indirect models.
Accordingly, per Part HLW-101.2, Section IV of the
ASME Boiler and Pressure Vessel Code, all Bradford
White Single-wall Indirect products are exempted from
MODEL
Hot Water
Availability
(Minutes)
Coil Heat
Transfer Area
(Sq Ft)
Pressure
Drop at 12
GPM
(Feet of
Head)
SW-2-30-L 5.5
14.2
1.3
SW-2-40-L 7.5
14.2
1.3
SW-2-50-L 9.0
14.2
1.3
SW-2-65-L 11.0
14.2
1.3
SW-65C-5 10.5
27.2
2.6
SW-2-80-L 13.5
14.2
1.3
SW-80C-5 13.2
27.2
2.6
SW-2-120-L 20.8
14.2
1.3
SW-120C-5 20.6
27.2
2.6
INTERNET VERSION FOR REFERENCE ONLY