Appendices, Reference guide for water heating – GSW Signature Series Electric User Manual
Page 82
70
Appendices
Reference Guide for Water Heating
= 23 gallons per hour
= 80
o
temp
= 45 gallons per hour
= 80
o
temp
ELECTRIC
Energy Costs:
KW x fuel costs = energy costs
100 x 0.05 = $5.00
To obtain gallons per hour
(GPH) recovery
WATTS
2.42 x (temp rise
o
F)
I have a 30-gallon electric
heater, non-simultaneous
operation, 4,500 watt elements.
What is the recovery GPH if my
cold water is 40
o
F and my
thermostat is set to 120
o
F?
4,500
2.42 x 80
Temperature Rise (
o
F)
WATTS
2.42 x GPH
I have a 30-gallon electric
heater, non-simultaneous
operation, 4,500 watt elements.
What is the maximum
temperature rise if the heater
can recover 23 gallons per hour?
4,500
2.42 x 23 rise
GAS
Energy Costs:
Cubic feet x fuel costs = energy costs
100 x 0.75 = $7.50
To obtain gallons per hour
(GPH) recovery
HOURLY INPUT (BTUs)
11.0 x (temp rise
o
F)
I have a 30-gallon gas heater,
rated at 40,000 BTUs. What is the
recovery GPH if my cold water is
40
o
F and my thermostat is set to
120
o
F?
40,000
11.0 x 80
Temperature Rise (
o
F)
HOURLY INPUT (BTUs)
11.0 x GPH
I have a 30-gallon gas heater,
rated at 40,000 BTUs. What is the
maximum temperature rise if the
heater can recover 45 gallons per
hour?
40,000
11.0 x 45 rise
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