Emission measurements 2015
DUH commissioned a measurement of eight chain saws and four brush cutters in 2014 carried out by TÜV Nord. The results showed that eight out of twelve engines exceed the limit values for CO, HC and NOx.
Emission measurements 2016
In total, 18 of the 24 device types significantly exceeded the limit values for HC+NOx (total of hydrocarbon and nitrogen oxide emissions). Only seven of the 33 objects tested complied with the current limit value level II of Directive 97/68/EC in its version 2012/46/EU. On seven of the tested machines it was not possible to find or read the type approval number. In six of the devices bought on the German market, the carburetor could be unrestrictedly adjusted by the user.
Emission measurements 2017
The 21 devices measured in 2017 were taken from the German, Swedish, Denish and French market. Nine of them do not comply with the EU limit values for HC+NOx (sum of Hydrocarbons and Carbon monoxide) – three of these machines exceed the limit value for CO additionally. With a limit value exceedance of 760% the highest exceedance ever have been documented in 2017.
The type approval number of five of these devices is of particular note. For three machines the information about the limit value, which needs to be right behind the approval number, is missing. Two of the devices did not have a approval number at all.