Workshop burners have a few points to note, because they are usually going into temporary structures, sheds etc. they are not regulated in quite the same what as an appliance being fitted to a building. Manufacturers still have an obligation for the appliance to be 'fit for purpose' and the installer has a 'duty of care' however the building regulations (Document J) do not apply.

Greenhart	Greenheart workshop stoves come in 7 different sizes, so you can make your choice of stove and flue system depending on the size of your workshop. The Greenheart stoves start at a compact 4 kW stove, which comfortably heats up to 65 cubic metres, ranging up to the 18kW workshop stove which heats up to 250 cubic metres. www.workshopstoves.co.uk
Clarke	Clarke (or rather Machine Mart) retail some very inexpensive stoves including the pictured 7kW Boxwood. Manufacturing is Chinese but quality is respectable. www.machinemart.co.uk
Dowling	The Dowling Firebug is a 12kW workshop stove that would look good in a rustic domestic setting. Dowling's stoves occupy the borderland between domestic and industrial. www.dowlingstoves.com
Oakfire	Solidly built and robust, Oakfire workshop stoves are made right here in the UK. Oakfire workshop stoves are designed specifically to burn sawdust, shavings, off cuts and other timber. www.workshopstoves.co.uk