Been thinking about this. Brinsea makes a 50 chick hover heater for about 100. Ya know those white Enviro/EVO panel heaters that cost about the same?
http://www.eheat.com/ What if we used one of those to heat a brooder? Maybe use it on a side wall behind a wire screen that the chicks could get warm, but not touch the panel? Who says the heat has to come from the top? Maybe use that silver thin insulation for a roof, that has some adjustable vents built into it so the interior temp can be adjusted by sliding them open and shut.
Hum,
Karen