Kaos, you might want to look into an electric infrared strip heater and heat only the work areas needing attention. I use the heaters in my barn to keep my critters warm but I am planning to install one over my main work area. They have a control knob to dial in the heat so they have adjustability. I too am making my R/C shop in a metal building. Rather than spend the energy and money to insulate the whole building (at least this winter) you could use one hanging heater to keep you in the heat.


Dan