do you mean an "oven" for cooking laminated bows? or a wood drying "hot box" for drying staves?? if your asking about an "oven" I have a 150 degree on and 180 degree OFF thermostat in my oven.. I have Four 100 watt bulbs in it and it only gets up to 165 degrees,I need to insulate it and try out some 75 watt bulbs. I have an insulated plywood "hot box" I built in 1994, I ran a 75 watt? or 100 watt? bulb in it with a small fan to keep heated air moving, I think I tried to keep temps arround 110 degrees???