Advantage 15: The Thermal Logic Door System
There's more than meets the eye! Like the main frame of the kiln, all the bricks in the Bailey door are held under compression with ingenious methods of spring loaded compression. No mortar is used. You can adjust bricks to get a perfect heat seal, and you can replace bricks at any time. Future service is made simple.
Most larger models of the Thermal Logic Electric will have elements in the door. Some kilns don't require a door element for heat uniformity or heating.
The spy ports are larger than the small round style, so you have an easier job viewing the cones. The inner wall of the port is beveled so you can have a wider view. The top and bottom of the ports are made of alumina shelf so there won't be abrasion from the spy plug removal and replacement over the years. The exterior of the door has the hollow wall cavity so heat is directed into the residual hood for efficient removal.
NOTE: Bailey doesn't use fiber doors as we find in school situations that fiber is not well suited. It is easily damaged, and can be over compressed. The door area is a high activity zone where it is easy to brush up against. Putting a hard coating on the fiber is superficial at best, and there are future issues of shearing off. Insulating firebrick is ideal. It is an equal insulator, it is resilient to rubbing against, bumping, and impacts. We have coated the IFB doors (without elements) with an emissivity reflective surface to enhance the energy efficiency.