75" W FOR OPTIMAL PERFORMANCE replace water panel annually HUMIDITY FOR HEALTH Aprilaire Humidifiers can help you maintain optimal humidity in your home of 35% – 45% which has been shown to ...

Overall score for the Aprilaire 213 Merv 13 is mainly how well the model removed dust and smoke from a test chamber and airflow resistance for whole-house units. Dust/pollen/smoke removal ...