During a scheduled service, the HVAC service technician mentioned that I might want to replace my electronic air purifier with this filter. It has the same size as the electronic elements and is therefore used directly in place of the electronic elements. I was told to leave it for about a year. Shortly after installing the filter, I noticed that the air was fresher. Now I use it exclusively, especially when I see how much dust and fine particles this filter collects. The price seems to have gone up. I seem to remember paying $50 for this filter. But I bite the bullet and pay the premium because I think it's worth it.
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