A new standard in super efficient and clean-burning stoves is being made available now, well ahead of the 2022 target.

The Stove Industry Alliance (SIA) is driving this standard forward and it means customers of new stoves can benefit from higher efficiency stoves now. It also means you can do your bit for the environment by either replacing an open fire or old woodburner with one of these new models.

From the SIA website

Ecodesign is the European-wide programme to lower emissions. It is due to come into force in the UK in 2022. The main manufacturers in the SIA have decided to release stoves that will meet the lower emission limits now, and from 2020 to only manufacture wood-burning stoves that meet the new Ecodesign criteria, two years ahead of schedule. 
As with HD ready TVs the Ecodesign Ready label will inform consumers that the stove will meet the new stringent emission limits.

http://www.stoveindustryalliance.com/ecodesign-ready-stoves-and-air-quality/