Construction set II - fits all types. Flexible placeable at motor-homes or caravans. Because of a special mounting it is hardly audible. No changes at the outside walls are necessary. Improved filter technology - the neutralised gases will be guided via the bottom. Measures: filter Ø11 cm, height 9 cm. Height of the complete compact unit incl. ventilator : 16 cm. Please order filter cartridge ( art. no. 662347) at the same time.