- Is MERV 13 too restrictive for my furnace?
- Most modern systems handle MERV 13, but older or undersized blowers may lose airflow. If you notice longer run times or weak vents, step down to MERV 11.
- How often should I change this filter?
- Every one to three months, depending on pets, dust and how often the system runs. A 24-pack covers two years at monthly changes.
- Does 12x24x1 mean the exact size?
- Filters are usually about 1/4 to 1/2 inch under the nominal size so they slide into the slot. Measure your old filter before ordering.
- Is this filter washable?
- No. It is a disposable pleated filter; rinse-and-reuse filters are a different product.
- When is the price lowest?
- Bulk filter prices tend to dip in spring and fall HVAC-change seasons and during store promotions. The listed price is $174.97 at The Home Depot as of November 7, 2026.
- Where is the Simply 12 in x 24 in x 1 in MERV 13 FPR Furnace Air Filter 24-Pack cheapest?
- At The Home Depot, for $174.97, as of our latest check.