Where to begin, out of the box a number of the fins are bent. Cannot in any way, other than taping, get front cover on (pointed out elsewhere). Getting one corner on pops the other off, totally! But here's what you need to know: the quite anemic heater cannot be set without turning off the A/C. I was expecting a set and forget unit which is why I bought this among all others. Set a minimum temperature and a maximum temperature and have this unit work to keep this. No can do. So have to buy a small heater and leave this in A/C only mode--would not have bought if I had know this!