It gives us great peace of mind - especially during Covid-19 - to have these well-made MERV filters filtering the air in our home. And since we change it out every other month, we just order a regular auto-shipment of 6 a year and never have to worry about forgetting or running short. Wonderful!
I think the filter will be effective. The only issue I saw was the quality of the manufacturing. Some of the panel pleats were not uniformly configured, and I couldn't reposition them without damaging the unit. Some of the pleats were right next to each other, so I assume the sides that were against each other would not be as effective at filtering as they should be. It's just my non-expert opinion of what I would expect in a performance issue with these "problems". Regardless, I still think the filter will do its job because most of the filter looked like I expected...uniformly configured. I think it will be a good filter for the price.
I was very disappointed in the quality of the filters. The wrapper was torn, the corners were bent, the lattice pieces didnt fit .... just didnt justify the price. Sorry.