Protect your family and your HVAC system with the Aprilaire 2416 Whole Home Air Purifier. The 2416 features a painted steel cabinet and comes with a 416 Allergy & Asthma Air Filter, which removes up to 99% of asthma triggers. This model has a nominal size of 16" x 25" - one of many sizes available for contractors to install into a wide variety of HVAC systems.