Great find! A distiller will suck some power though, but definitely cheaper than store bought. Mine is also a full sized home model (and was also free) and it burns about 1 kWh per liter of distilled water it produces. Mine has a large storage tank so I try to do as much of my distilling as I can in the winter months where that power use is enjoyed as 'free' heat, and during the off hours when hydro is cheaper.