wool or castable?
I have very little experience with either but I DO know that castable takes a good while to cure and most of us will not wait long enough! Castable also has the dissadvantage of a short shelf life. You will most likely purchase extra and it will probably go bad before you get a chance to use it 5. Any advantage or problem in insulating the outer casing? (summer in GA is hot enough!) This can be problematic if you are using a steel shell. The only thing keeping it from melting or burning up is the outside being cooled. I use sheet metal heat shields in these cases. A thin steel plate or enclosure set about 1″ (2.54cm) from the case with ventilation (duct it into the exhaust or recoop some heat). I use galvanized flat roofing material and use two air gaps between motors and controls. The first air gap and shield converts most of the radiant heat to non radiant. The second finishes the job and is usualy cool to the touch.
