Demand destruction

Sorry for the ominous title to this post. Actually "demand destruction" is a good thing. In the energy conservation world, the concept means the elimination of need for electricity from power companies. We've taken another step in that direction with the installation of our new heat pump hot water heater, pictured below. Thanks to our solar energy, we've only used about 3.8 kw/hrs of electricity per day from the grid for the last 17 months. The new water heater should save us close to our average daily grid usage by taking heat from the surrounding air to decrease the need for electricity. The room stays warm during heating season especially since our wood stove stack lets off lots of heat only 1 foot from the water heater.