Looking at the research on heat output efficiency of smokeless coal and dried woods on both multifuel/wood burning stoves and for open fireplaces. <br /><br /><a href="https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/933099/burning-wood-consult-bsria-report1.pdf" target="_blank" rel="nofollow">https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/933099/burning-wood-consult-bsria-report1.pdf</a><br />...<br /><a href="https://www.youtube.com/watch?v=2csVXnsmxl8" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=2csVXnsmxl8</a>