Would have been 5 stars, but several of the filters were crunched on one edge, obviously in packing. Should work okay, but will be somewhat difficult to get into the slot where they fit.
These filters fit my high efficiency furnace perfectly putting an end to my struggles with the cheap filters I was buying at the home improvement stores.
I change my furnace filter every three months. I have allergies and I want my air as clean as possible. My HVAC guy has warned me about using too high of a MERV value due to the potential of restricting airflow which has the potential to damage the system. I like that these have the feature of not restricting airflow. Very easy to use.