I have an Eden Pure heater in my work room. It's an added on room with lots of windows & not insulated very well. I've only lived here for 2 years, so it was sort of experimental for me. My sewing machine & knitting machine are computer models, so I have to keep heat above 50, tried to maintain above 60. Found my electric bill very high. This year after Christmas I'm moving my machines in main part of house. Hope you have better luck than me.