I also love my ecoglo, and ChickCrazed is right about it not heating the brooder, just the chicks. Like a broody mom would. My house is at 70, and they do fine with it. And X2 on the size. I wouldn't put it with more than 10 chicks tops. On a related front, I just found that Premiere1 (www.premiere1supplies.com) where I got my electrojet, now sells something very similar, and at half the price!! I'm getting my large one from them. I'm guessing at that size, I'll be able to use it with 20-25 chicks.The things I love about it are the energy savings and the fact that I don't have to worry about a fire accidentally getting started. It basically allows them to press against it for heat, but doesn't put heat "off" if like a regular heat lamp. They figured it out pretty quickly. The drawback is that since it doesn't "put off" heat, it doesn't heat the rest of the box. The first night the room was too cold and they wouldn't leave the eco-glow to eat or drink. I had to crank my heat to get the room warmer and they have been fine since the room hit 70 degrees. Their room is in the back of the house, and it tends to be a colder room so I have the rest of the house at 80 degrees to keep that one room warm enough. I will be glad once I can pump the heat back down to a reasonable level. I figure I can lower it a few degrees a week so it will only be a problem the first couple weeks. Overall I would recommend it, but it would not be big enough for 20 chicks like they claim. At night they all slept under there and i think 8 or 10 would max the space out.