Air pollution control

Ordinance on Air Pollution Control for wood heating systems

The Swiss Ordinance on Air Pollution Control (OAPC) prescribes emission limits for various types of systems, including wood heating systems. In the course of the revision of the OAPC, the permissible emission limits from wood combustion have been tightened.


In the years to come, wood heating systems will only be able to comply with the dust emission limit with suitable cleaning systems.


The emission limits of the Ordinance on Air Pollution Control for dust


Emission limits of OAPC for solids (dust) in mg/m³up to 70 kW70 kW - 500 kW500 kW - 1 MW1 MW - 10 MW

over 10 MW

from 1 January 2008

-

150 mg/m³

20 mg/m³

20 mg/m³

10 mg/m³

from 1 January 2012-50 mg/m³20 mg/m³20 mg/m³10 mg/m³
from 11 April 201850 mg/m³50 mg/m³20 mg/m³20 mg/m³10 mg/m³

Examples of suitable cleaning systems include our electric filters.

A selection of modular e-filters can be found here.

Readings of emission measurements with and without the electric filter

Simultaneous emission measurements with and without the electric filter reveal an efficiency factor between 91 and 98%. All measurements are in mg/m³ and quoted under normal conditions with an oxygen level of 13% and can therefore be directly compared with the emission limits of the Ordinance on Air Pollution Control (OAPC).


“Measurement 4” includes cleaning of the filter tubes of around two minutes.


Without filter
With filter
Measurement 1
Measurement 2
Measurement 3

Measurement 4