Product review (1 stars): very disappointed with this filter
Very, very disappointed with this filter. Yes, it is the proper length for a MAF-1 YET ii is SOOOOON thin. The filter after a couple of DAYS collapses causing the check filter message to be displayed. I tried plastic tie locks to help keep it together yet it would still fall down inside the humidifier.
Also, the top part of the filter closes to the fan drys out...so I flipped it. TOTAL WASTE OF MY MONEY!!!! I have my humidifier set a 45% and fan speed at lowest speed.
DO NOT BUY THIS PRODUCT FROM THIS VENDER!!!  I bought 2 filters to finish this winter season and I don't think the second one will make it to Beg of Spring here(March 20th) I bought the MAF-2 for my smaller humidifiers from another company...one of their filters is TWICE the width of this product!!! The product was shipped to me in a separate plastic bag taped closed. I WILL NOT BUY ANOTHER PRODUCT FROM THIS VENDER!!! EVER!!