Production is performed at a location in the factory in Weener. The necessary raw parts and semi-finished parts, auxiliary parts and consumables are supplied by suppliers and enter into production. The production of semi-finished parts is performed in prefabrication with standard production methods. Metal parts are punched and chamfered or milled into shape. Plastic parts are produced on injection moulding machines. Pre-cut parts are optimised accordingly in order to avoid waste. Waste which is generated nevertheless is collected and recycled as far as possible by appropriate companies, or disposed of as domestic waste and burned. Lubricants are predominantly collected, treated and re-used in production. Dust and vapours are extracted and collected on site. The parts from prefabrication are installed in final assembly together with purchased part to construct the volume flow controllers, inspected, packaged and dispatched within the scope of quality assurance as per ISO 9001. Each volume flow controller is adjusted in the factory for high and continuous control accuracy. Operation is subject to an energy management system. Technical data: The requirements as per the harmonised standards for CE markings on electromagentic compatibility (EMC) as per EU Directive 2014/30/EU, the performance rating as per DIN EN 12589:2002-01, Ventilation for buildings - Air terminal units - Aerodynamic testing and rating of constant and variable rate terminal units and the associated requirements as per ISO 5135, ISO 3741, ISO 5167-1 and EN 1751 are met. Declared unit: The declaration relates to the manufacture of a single VKE volume flow controller (dimensions 200 x 100 x 275 mm), including actuator and electric control unit, as per PCR:volume flow controllers and volume flow limiters for ventilation systems. The eco-balance results of variants or varying dimensions of the declared product can be provided by Wildeboer Bauteile GmbH on request.