Guide
DEFRA exempt stoves: what the list means and how to check it
Updated
Exempt does not mean smokeless, it means tested. A stove on DEFRA's list has shown it can burn its listed fuels without emitting substantial smoke, and that listing is what makes wood legal in a smoke control area.
What exemption means
An exempt appliance is one listed by DEFRA for England as able to burn a fuel that is not authorised, usually wood, without producing substantial smoke. In a smoke control area, that listing is the only route to burning wood legally (gov.uk). The official list is at smokecontrol.defra.gov.uk, and each nation of the UK keeps its own version, an appliance exempt in England is not automatically exempt in Scotland or Wales.
The conditions people miss
- Fuel types are part of the exemption. Each listing names the fuels the appliance may burn, a wood-only exemption does not cover mineral fuels, and vice versa.
- Operate to the manufacturer's instructions. The exemption assumes the appliance is used as tested: right fuel, right moisture, air controls not modified.
- Burn dry wood. In England, wood sold in volumes under 2 cubic metres must be Ready to Burn certified at 20% moisture or less; wet wood smokes even in an exempt stove and undermines the exemption's purpose.
- Exempt and Ecodesign are different labels. Ecodesign is an emissions standard all new stoves sold must meet; exemption is the separate DEFRA listing that matters for smoke control areas. Many stoves are both, check the list, not the brochure.
Checking a model, and buying one
- Search the exact make and model, including variant, on smokecontrol.defra.gov.uk; listings are model-specific.
- For a stove you already own, the manual or the data plate usually states the exemption; when in doubt, the list wins.
- Buying new for a smoke control area: filter for exempt models first, then have it fitted by a competent installer (HETAS registration is the common route) so building regulations sign-off is handled.
Not sure whether any of this applies to your address? Run the checker first, outside a smoke control area an unlisted stove is perfectly legal for wood.