NOTE: The back insulation panel is NOT field replaceable. Contact Steffes for more information.
The back insulation panel is a fumed silica insulation panel that provides superior insulating with a minimum thickness. The outer jacket of this material is only to aid in shipping and handling of the panel. In normal operation, this material will develop cracks. This is a normal condition and will not affect the insulating abilities of the material. If the inner formed powder panel is damaged significantly, the heater MUST be taken out of operation. Significant damage would include, but is not limited to, narrow cracks 1/8" or less and deeper than 1/2" and wide cracks or missing areas greater than 1/8" wide and deeper than 1/4".