When dust and contaminants build up in your furnace or air conditioner, they can decrease efficiency by 10-25% and cause premature breakdown. Aprilaire air cleaners prevent blowers and coils from collecting dust and dirt, keeping your duct work cleaner and your equipment working for you. Aprilaire high efficiency air cleaners are up to 99% effective at removing particles you cannot see from the air your family breathes. They operate silently and require very little maintenance, protecting your family, home and equipment.