What Are Defra Approved Stoves? Also called Defra Exempt Stoves and Smoke Control Approved Stoves, these stoves are designed to burn Defra approved smokeless fuels like Anthracite ovals. However, they will not be suitable for use with wood. To be exempt from Defra the stove's air controls as well as its flue draught must pass tests in a laboratory. These tests may differ fr
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