Teds Wood Working - A routed groove adds interest to flat-panel doors, but finding a way to radius the corners was a mystery to me. This router subbase changes that. First, build a router subbase from 1 Get A Lifetime Of Project Ideas & Inspiration!
Running an fan through the middle to blow air up the pipes would help it radiate out. Bend the pipes around a 55 gallon barrel and make a rocket style insulation around it with sand and plaster. Place some sort of central blower to control speed of air