Posted on March 29,2015 by user-1095434 in DHW
I've now had a year with the Geyser heat-pump water heater (HPWH). With the exception of the puddle on the floor in July 2011, it has performed consistently.
Its performance has not been thrilling, though. In the summer, it was making hot water at about 0.13 - 0.15 kWh/gallon, with incoming water in the mid-60°Fs and basement air temperature around 70°F. In the winter, with basement temperatures in the low to mid 50°Fs, and incoming water at 50°F or a bit below, this consumption ratio increased to 0.25 kWh/gallon.