Norwegian ventilation unit manufacturer Covent had been searching for suitable capacity control since 2012. It found what it was looking for in Bitzer’s Ecoline reciprocating compressor. Covent produces approximately 1,200 ventilation units per year. These units have been equipped with Ecoline reciprocating compressors and CRII capacity control, allowing the Norwegian company to install the equipment and capacity control in all of its ventilation units with integrated cooling.