The Honeywell F100 20 x 20 media style air cleaner is a whole house air cleaner that uses a disposable filter media to remove airborne particles from the air. This Honeywell air cleaner series includes the models F100B1024, F100F1020 and F100F2036. Its filter media must be replaced every 6 months if you have heating and cooling or every 12 months if you only have heating.