The Baxi Magnetic System Filter for Heat Pumps is a filtration device designed to protect and maintain the efficiency of heat pump systems. It works by capturing and removing magnetic and non-magnetic debris, such as sludge, dirt, and iron oxide, from the heating system's water. This helps prevent the build-up of contaminants that can cause blockages, reduce system efficiency, and lead to costly repairs. By keeping the heat pump system clean, the filter ensures smoother operation, improves energy efficiency, and extends the lifespan of the system.