Consider what the burnout, preheat or FlashFire Dewax furnace has to go through, many times 24 hours per day. High temperatures, high velocities, smoke and fumes, temperatures cycling constantly, doors opening and closing continuously and operators moving molds in and out of the furnace, all day long. All this activity takes its toll in the form of shrinking and cracking refractories and insulation, worn components (particularly in the door area), burner and control adjustment, and specifically for FlashFire Dewax, wax build-up in the drain tubes and extinguishing chamber.