Click to expand Tap to zoom Viessmann Cleaning tool (main heat exchanger) for All domestic units - 7858492 by VIESSMANN SKU 7858492 Please call to check availability before ordering Live Chat / 01985 850982The Vitodens Cleaning Kit is designed specifically for removing residue from Inox Radial heat exchangers. It comes with two additional blades, ensuring that you have everything you need for a thorough cleaning. Accessories