Couple of points. 1)As others have mentioned, you may wish to hook this up with a timer so that it doesnt "run dry".Yes the unit turns off on its own but it will solidify the sediment if it runs the full cycle , then cleaningbecomes a chore. 2)Next is the $$ issue; this unit took 3hr 45min to distill the 1.1 gallons at 2.9Kwh.Multiply that number by your local rate for electricity. 3) Do you want to drink distilled water as your mainsource of water? Not advised, so probably you'll want to add some mineral mix 4) In winter, there is some "bonus" to having the unit run in your house as the fan definately throws off heat. Thats good. However, no one has commented on the obvious nature of the fan evaporating some of the nasty chemicals, in the form of gasses, into the air of your home. Im not a chemist but this would seem to imply that its better to run this machine in your garage or similar space.