Heater Element for Coleman Electric Furnace S1-3500-410P/A. Electric Furnace Part Coleman part number S1-3500-410P. Heater Element with Limits 9.6 Kw. 240V. Replaces part number 3500-410. Used in many Coleman EB10,EB15,and EB20 Series electric furnaces. To see if this part is right for you contact your General Supply sales for more information.