"The telephones are ringing constantly," says Wolfgang Maus, Emitec chairman.
This year, Emitec will make about 500,000 particulate filters for retrofitting (for cars by the Volkswagen group, among others), and 200,000 units as original equipment.
Maus expects demand for both retrofitted filters and original equipment will increase even further, both in Germany and elsewhere.
Emitec manufactures diesel particulate filters for cars and heavy trucks at its plants in Lohmar in the regional state of North Rhine-Westphalia and in Eisenach in Thueringia in eastern Germany.
Emitec is currently increasing its capacity to 500,000 from 200,000 units at its Eisenach plant. The additional 300,000 units are filters intended for retrofitting.
Twin-Tec is Emitec's partner in the retrofitting business. Twin-Tec is based in Koenigswinter, near Bonn, and integrates diesel particulate filters in the exhaust emission system by exchanging the oxidizing catalyst.
Twin-Tec's marketing director, Jochen Krainski, says a retrofitted filter can reduce a car's particulate emissions by between 60 and 90 percent. With heavy trucks, particulate matter emission can be reduced by around 70 percent.
Krainski says it is wothwhile to fit a filter on 4.5 million of the 8 million diesel cars in Germany.
Drivers must expect costs of between 650 and 750 euros, which would include fitting at an authorized garage, says Krainski.
Krainski believes that additional costs for heavy trucks will be between 6,000 and 7,000 euros.