[NYNick]

I have a Heat Pump water heater. It is almost the same size as a regular water heater but has a heat pump on top. I built a new garage with an apartment above it. My utility gave me a $750 rebate to buy it but it's still more expensive than just a regular electric water heater. Be careful of the Rheem brand. They have a reputation of being noisy.

I have ben trying to track its energy use. We have a 50 gallon State Heat Pump Water Heater that has an electric element back up built in. There are only two of us, but it seems like it's costing about $4 per week. It also has an app, a vacation mode, energy use, kWh etc.

It is located within my mechanical room within my heated and air conditioned garage. I keep the garage at 60 degrees in the winter. The water heater vents cool, dry air, which I decided to vent from the mechanical room into my garage to help with any humidity. The lower the humidity the better for my collector cars.

I love this water heater. I'm not sure about the overall ROI, but I don't care. It's the most efficient way to heat water.