BoilerMagXL is a high-performance filter for light commercial, retail or large residential properties. BoilerMagXL provides protection against three key areas that are commonly associated with heating and cooling systems, magnetite (sludge), scale and air. The integral mesh guard intercepts limescale and other non-magnetic debris; the high-performance magnetic core removes magnetite (sludge); and the automatic Air Vent reduces the risk of air-generated corrosion.