I thought this might be helpful for people looking for reviews on the sweeter heater for the brooder as I couldn't find one when I was researching. I keep the sweeter heater about five inches off the ground. I also have a light on since they are in the garage. The chicks took right to it. They stay under it and get nice and toasty and then come out, eat, drink, flap their mighty wings, and peck at each other. After a while they go back under the heater to warm up again. At about 8 or 9 at night I turn off the light and they get all quiet and cozy under the heater and then pass out. In the morning I turn the light back on and they all dart out from under the heater and attack the food and water. I have 13 Australorp under the 11" ×11" and it seems perfect. I don't know how well it would do in truley cold conditions, but it works wonderfully in the ones I have now.