The construction of the successful Type E of the rectangular flow volume controller has been revised and expanded from 6 to 19 sizes. The most important innovation is the expansion of the range of sizes to 19 dimensions for volumetric flows from 40 to 3360 l/s or 144 to 12096 m3/h. The length of Type E has been specified to a uniform 400 mm for all sizes. The W x H dimensions range from 200 x 100 to 600 x 600 mm. All sizes are also available with additional acoustic cladding. The type is supplemented by the matching secondary silencer Type TX and matching PXX air heater. For more information refer to the Systems printed paper 5/9.1/D/4.