How can GFX halve the cost of a hot shower, yet triple the shower-capacity of an electric water heater?
Typically, a 105F shower fed by 45-75F water at 2.25 gpm depletes a water heater’s stored energy at rates of 20 to 10 kW until the heater’s upper-element is energized and these rates are reduced to 15.5 to 5.5 kW, respectively. By feeding back 10 to 4 kW (50% to 40%), the Model G3-60 can further reduce these depletion rates to extend showering-times by factors of about 2.8 to 3.7. In fact, third party testing at Old Dominion University found GFX boosted First Hour Ratings of a high efficiency 50-gallon electric water heater from 60 to 180 gallons.
