15x20x2 MERV 8 Pleated Air Filter 6PK - 14.5x19.5x1.75 - Actual Size 12x18x1 The NCP-20BB filter should be

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

and Watts MAXETW-FF975

24x30x2 MERV 8 filters are a considerably better choice for healthier air

Actual Filter Size: 9

One year limited Warranty

15x20x2 MERV 8 Pleated Air Filter 6PK - 14.5x19.5x1.75 - Actual Size 12x18x1 The NCP-20BB filter should be15x20x2 MERV 8 Air Filter Box of 6 Actual Filter Size: 14. 5x19. 5x1. 75 Our goal is to provide the best air filters for every home. While pure air is always our goal, we know that some HVAC units are unable to use higher MERV rating filters. So, we also offer MERV 8 filters. Our 15x20x2 MERV 8 filters are the perfect filters for homes that have older HVAC units. Even though MERV 8 filters are not as efficient as higher MERV rating filters, they are