Keep your air humidifier system running its best by replacing the filter every 6 months. When it's time to replace the air filter in your Lennox Healthy climate humidifier, trust the Lennox filter pad replacement to keep your air clean, clear, and breathable. This Healthy climate #35 replacement water panel fits humidifier models HCWB3-17, HCWB3-17k, HCWB3-17A, and HCWB3-17AK. Breathe easier in your home by replacing an old or dirty air filter with this Lennox air dehumidifier filter replacement.