A Defra Exempt stove has passed a lab test where its emissions are measured at its rated output and at a reduced rate. This is to help reduce air pollution in towns and cities that are Smoke Control Areas. A Defra Exempt stove can generally be used to burn wood in a Smoke Control Area - it actually depends what fuel the lab test was carried out with but this is nearly always firewood.
It is worth noting that the Ecodesign legislation which is due to come into force in 2022 sets what are arguably even stricter emissions limits than those set for Defra Exemption, but the framework doesn't include the low output test. We may well see the introduction of an additional low output test for stoves that can be used in Smoke Control Areas after 2022.
The smallest 4.9 kW model is perfect for small homes. Change the standard look by adding the pedestal for a contemporary twist, this lifts the stove for an eye level view of the flames and makes it easier on your back for loading.
The Arada Farringdon Large stove has the highest maximum heat output of 12kW which will keep you warm through the coldest of winters. The Farringdon Large is a very controllable stove so you can easily burn it more slowly when you don't need the full 12kW.
The Arada i600 Slimline has such a wide view of the flame, but with a low 5 kW output. There is the option of a direct air supply if required and Arada offer a wide choice of stove body and door colours.