I received this filter at the end of January 2021. I installed it on the way back (correct) on February 1st. The next day my allergies were driving me insane, itchy eyes, a runny nose that was also stuffy, fits of sneezing. I stood up to him and made him clear today March 2nd. I spritzed it in the tub to make sure my eyes would tell me as soon as I pulled it out. There was nothing to wash! Keep in mind we had some very long cold spells at the time where the air conditioning/heating worked a heck of a lot to keep the house warm. Emissions would be dirty. I really wanted this permanent filter to work! I would have saved a lot of money, plus it would have been better not to fill the garbage heaps. If it worked, I would have to swap a second one so that the other one can dry. Guess I'll have to break down and look at the outside unit to see how much crap is on the outside filters to get me out in the cold to clean the outside filters VERY EARLY to protect the block. So my advice is if you are allergic stay away from this product. If you care about your device, stay away from this product. The only positive I can think of is that it is a permanent filter that is easy to clean. But of course if there is nothing to clean then it would be easy.
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