I brood outdoors and I am sure I'm in the minority here. But, a secure structure with good draft protection and a heat lamp works fine and keeps the chick dust and smell out of my house. They produce TONS of dust from feather sheaths. The other nice thing about outdoor brooding is that you don't have to worry about when to move them out -- they already are! Instead, you keep an eye on where they sleep and take out the light when they stop sleeping under it. It couldn't be easier.
Oh, and lest you think I can do this because I live somewhere warm, these chicks were exposed to outdoor temps in the upper teens during their first couple of weeks. I heat a space in the structure with a 175W lamp, not the whole thing. The water was close enough to the light that it didn't freeze but it wasn't exactly toasty away from the light. They were FINE. Really. They're 6 weeks old now and feathered so they're done with the light.