How Muffle Furnace Overhaul
Aug 11, 2017 Muffle Furnace Installation. The furnace is shipped pre-wired and ready to hook up to your electrical supply. DO NOT INSTALL FURNACE CLOSER THAN 12″ FROM ANY SURFACE. For proper door operation, install the oven at level. Install the oven on its structure or a sturdy table. If necessary, fix the table to the floor and secure the oven on the table.
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