I have read all the negative stuff posted about this smoker not working in colder weather because it will not keep up to temperature. So I attempted to make a rube goldburg solution. After much consideration and research on the melting temperature of the space blankets you buy for 10 for 6.95 on ebay, I used heat duct aluminum tape and taped the space blanket material over the window. and all sides excepting where the vent is. I did each side and the top as separate pieces. I started the smoker at 12:15 today and it is around 15F on my back porch. I have a cold smoker attachment and I filled it with wood chips. It got to 250 in fifteen minutes. I turned the cold smoker on and put in a 5 lb. chicken and a rack of ribs The smoking is going beautifully and the unit is maintaining temperature very well. Chicken up to 141 internal temp at 2:45 and ribs looking beautiful redish smoked look. Using beer in the water tray and using apple and cherry to smoke. Plan on smoking another two to three hours. Only my third time using this unit but so far it is a wonderful experience. Remote is great on a day like today. I can check it from a warm room. However, since I am new to this unit I go out often and check things and I am freezing my butt off!! But the chicken and ribs look wonderful !! Last ribs I made in warmer weather were awesome. My wife loved them and she is not crazy about smoked food. Maybe Masterbuilt has improved their insulation and I would not have had to heat blanket insulate it.