16x16x1 MERV 13 Pleated Air Filter 6PK - 15.75x15.75x.75 - Actual Size 18x18x1 Aprilaire 500 Humidifier

Aprilaire 500 Humidifier

The NCP-20BB filter should be changed every 3-6 months based on water quality and usage

Capacity: 200 gallons (757 liters)

it is reasonable to specify at least MERV 11 filters to maintain good indoor air quality in common types of spaces

16x25x4 MERV 11 filters are right on the cusp of being classified as “medium efficiency MERV pleated air filters” and “high-efficiency MERV pleated air filters

16x16x1 MERV 13 Pleated Air Filter 6PK - 15.75x15.75x.75 - Actual Size 18x18x1 Aprilaire 500 Humidifier16x16x1 MERV 13 Air Filter Box of 6 Actual Size of Filter: 15 3 4 x 15 3 4 x Air filters are ranked in a minimum efficiency rating value (MERV) system. The higher the MERV rating, the better the filter can filter out all airborne particulates. Since we are constantly trying to improve indoor air quality, it only makes sense that we would offer air conditioner filter MERV 13. 16x16x1 MERV 13 filters are right on the cusp of being classified as medium