Considering this, do I need a Defra approved stove?
The answer to this question is simple – if you live in a large city or an urban environment, the chances are that you will require a DEFRA approved wood burning or multi-fuel stove if you want to avoid a hefty £1,000 fine.
Secondly, can you use a wood burner in a smokeless zone? You must use a DEFRA Approved Stove to burn wood in a smoke control area. If you don't have a DEFRA approved stove, you can burn other approved smokeless fuels, but not wood.
Also asked, what does Defra mean?
Department for Environment, Food and Rural Affairs
What is an exempt appliance?
An exempt appliance is an appliance such as an oven, boiler or stove which has been specifically exempted to burn unauthorized fuels under the Clean Air Act:1993.