GSW Signature Series Electric User Manual

70

Appendices

Reference Guide for Water Heating

= 23 gallons per hour

= 80

o

temp

= 45 gallons per hour

= 80

o

temp

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

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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