Lately I have tried many brands to find the best and most efficient air filter for our home. Let me tell you what it is. It fits perfectly, does NOT slow down airflow (it's even better than many Merv 8 filters we've used in the past) and keeps the air in our home as fresh as possible. to find them, and they'll be our filters as long as they're available, period. I highly recommend these CleanReal Merv 14 filters.The best we've used, without exception.
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