Thank you for your question on the down draft kitchen exhaust system. You remove the filters from the air vent by grasping the tab at the top of each filter. Wash the 2 aluminum grease filters in a mild detergent solution or a dishwasher. When reinstalling the filters please note that they are different sizes. Be sure to replace them as removed, (wider one on the left), with tabs UP. There should be no problem using the down draft system with a gas range. Please contact the Technical Service Department at 800-637-1453 if you need further assistance.