The fuel filter for Airrex AH-200, AH-300, AH-800 and older AH1330 and AH-1830 heaters effectively cleans the fuel, protecting the heater against contamination and ensuring its long-lasting and effective operation. The filter should be replaced at regular intervals, at least once a year, depending on the level of use of the heater, to ensure that no contaminants from the fuel tank enter the burner. Perfectly matched to the above-mentioned models, it guarantees high efficiency and safety of use.