The clearSkies 4 mark tells you that your stove is kinder to the environment. It is an independently assessed endorsement that your stove exceeds all of the latest UK regulations. You've probably heard of the government's EcoDesign directive that ensures all stoves manufactured from 2022 onwards comply with strict environmental measures.
Any stove that has a clearSkies accreditation has been demonstrated to meet scrupulous safety standards for carbon monoxide (CO) and nitrogen oxide (NOx) emissions as well as environmental pollution rules that limit the emission of particulate matter (PM) and organic gaseous compounds (OGC). And that's just the lowest of the clearSkies ratings!
All stoves with the clearSkies 4 rating are approved by Defra, the goverment's Department for Environment, Food & Rural Affairs. Furthermore, they have been tested under laboratory conditions to be even more environmentally friendly than EcoDesign stoves, emitting 15% lower CO, PM, OGC and NOx. So you can feel confident that your new stove has been designed and built for a sustainable, greener future.