Self cleaning electrostatic precipitators electrostatic precipitators have been used since the mid-1930s, as air cleaning devices to remove sub micron particles from ambient and processed air.

Particle collection efficiency is measured on a single pass of contaminant charge. As with applications such as commercial kitchen exhausts, the usually accepted design parameter is 95% efficiency.

Since this application deals with a process-generated contaminant, the test method used is MIL-STD-282, more commonly known as the DOP test method.

Odour reduction as with all electronic precipitators they are particle collectors, not odour molecule collectors. True, electronic precipitators produce ozone, which is an oxidant, but is produced in such minute amounts there is no significant value in odour reduction.

Electrostatic precipitators for commercial kitchen exhausts are available from Clean Air Services.