I was very disappointed since it came broken. service was receptive but wanted to send just the machine shell without a new filter - my filter came in a loose state when received. I had to insist to get a whole new unit that included the new filter. Since my first one had never even been used at all, sending me the shell without a new filter made no sense at all !! all in all it was a bad experience. Fortunately the new unit received yesterday has started and is running so far. we shall see how it goes since I am now somewhat apprehensive about your products.