I posted links last year to my fave heater- this year I'll post a couple:
http://cgi.ebay.com/Heat-Runner-Fla...ultDomain_0&hash=item230b426501#ht_813wt_1059
http://cgi.ebay.com/Electric-Flat-P...ultDomain_0&hash=item3a603febc2#ht_580wt_1059
I use the second with great success, as it's localized, and I can stand it next to the roost. The only goal is to keep the neediest birds from freezing, and so I don't use heat in all my coops. I use heated dog bowls and base heaters for my waters- they're designed for it. Don't reinvent the wheel. Be safe.
http://cgi.ebay.com/Heat-Runner-Fla...ultDomain_0&hash=item230b426501#ht_813wt_1059
http://cgi.ebay.com/Electric-Flat-P...ultDomain_0&hash=item3a603febc2#ht_580wt_1059
I use the second with great success, as it's localized, and I can stand it next to the roost. The only goal is to keep the neediest birds from freezing, and so I don't use heat in all my coops. I use heated dog bowls and base heaters for my waters- they're designed for it. Don't reinvent the wheel. Be safe.