Yunca wood burners have one of the most comprehensive warranties for any domestic heater available in New Zealand today. All models have been tested and approved to comply with the clean air requirements of AS/NZS 4013:1999 sub 1.5g/kg particulates and 65% thermal efficiency or better, to meet national clean air standards, as well as tested and clearance approved to comply with AS/NZS 2918:2001.