These filters for our central heating/air conditioning system are quite expensive so I am delighted to find them here at Revain at a reasonable price. I change the air filter every 2 months during the hot and cold months because that's when my central system works best. I like filters that capture most of the air pollutants because we all have allergies and no matter how much I vacuum and mop it doesn't help without a good air filter that captures all the tiny particles. We also have 3 house cats so it's good to know that the air quality is as good as possible during the months when we can't open the windows for fresh air. I noticed that these filters capture very little dust and we can breathe easier with them. I would recommend.
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