Choosing a Defra Approved Multi Fuel Stove If you live in a Smoke Control Area you must use a DEFRA (DEpartment of Environment Agriculture, 34630194 - Www.34630194.Xyz, Rural Affairs and Farming) approved wood burning or www.34630194.Xyz multi fuel stove. They are commonly referred to as Defra Exempt Appliances and they permit you to burn approved smokeless ...