All three of these filters have a replacement schedule of six months. The filter may have to replaced early if there an excess amount of debris buildup. Inspecting the filters regularly will let you know when the discount filters need to be replaced.

Two of the discount filters in this size are designed to work in Trane HVAC systems, and the other one is a Trane frame kit filter.

The frame kit filter and one of the Trane replacement filters are both factory original products that are produced by Trane. They also both feature a Minimum Efficiency Reporting Value (MERV) rating of 8. This allows the filters to catch air particles that are as small as 3 micrometers. The other filter has a MERV rating of 11, and is generic replacement discount filter for the same Trane HVAC system.

While the discount filter is not designed by Trane, it is manufactured by a top organization in the industry. The filter is designed to the exact dimensions as the factory original, and is even more efficient. The MERV 11 rating allows for the discount filter to catch smaller air particles that are as small as 1 micrometer. This makes it perfect for someone with severe allergies because 99% of virus carrying particles are larger than 1 micrometer.