The filters are a perfect replacement for my system and are a top quality product at a relatively inexpensive price point. Getting on a 6 month replacement schedule is also tremendous.
I 'like' this Filter. My old-filter had the Charcoal 'pre-filter'. So, I'll see if I miss that...My Lennox Furnace requires this LARGE Filter, & I was pleased to see that there was an alternate (Less $$) alternative for me.
I had a Merv 16 I replaced with a Merv 13. The airflow on my heat pump seems to have increased and more humidity is being removed on air conditioning mode The dealer cost for filter was more than double Filter Buy..