FURNITURE SET INCLUDED. The rectangular top loaders from Nabertherm combine the benefits of a top loader with the sturdy design of a chamber kiln and are perfectly suited for professional use. The freely radiating heating elements always ensure perfect firing results. These models are ideal for working temperatures between 900 °C and 1230 °C. The infinitely adjustable fresh air opening in the bottom and the exhaust air opening on the side ensure good ventilation inside the kiln and allow the kiln to cool faster. Castors ensure easy movement of the kiln.