DOWNLOADS Breadcrumb Home Downloads Service Instructions Replacing the Furnace Insulation (Fiber Muffle) on Furnace Models L1/11-12, L(T) 3/11-12 - L(T) 40/11-12, LT 60/11-12 Choose a language Deutsch English Français Italiano Español 中文 Replacing Heating Elements - Furnace Model L(T) 5-15 1300 °C and 1400 °C Choose a language Deutsch English