I am going to install it tomorrow in one of my breeder pens. It is the ceiling mounted, 40 inch, 150 watt model. We plugged it in and it puts out a pretty good amount of heat. For now I will turn it on at night until the chicks are older, then I will use a Thermocube so it only comes on when the temp drops below 35 and off at 45. It is for my light Sussex birds. They are all 9 to 12 weeks old now. I have had them five weeks. Some of the smaller girls are still sparsely feathered. Here is what it looks like out of the box. There are clips on the ends and chain to hang it. More pics tomorrow. Edited to correct typo. The heater size is 40" wide, not 48'.