Nearly as good as GlassFloss filters
I didn't want to pay nearly $30 for an air filter.  I found these on line for $26 for a 2-pack.<br />I was slightly worried that I will get what I paid for.<br /><br />Here are the measured differences.  I took these measurements myself with the actual filters.  Both brands claim to be 30" x 28" x 2" Merv 11 filters.<br /><br />GlassFloss:  29 1/4" x 27 3/4" x 1 3/4"<br />Accumulair:  29 3/8" x 27 1/4" x 1 3/4"<br /><br />They are slightly different sizes but the filter slot in my Tranquility 30 heat pump has enough margin to accept either one.<br /><br />The Accumulair is built with less cardboard, making it slightly more flimsy (weighing in at 600 grams vs 900 grams for the stock GlassFloss filter).  But since there is less cardboard and thinner cardboard supports, there is also better air flow.<br />The filter media in the Accumulair filters is slightly thinner too.  The internal wire mesh in either filter is the same AWG of wire.  The heat-pump air exhanger is directly in back of the filter slot so a more flimsy filter is still able to have sufficient support.<br /><br />At only $13 per filter, The Accumulair is a good product at a great price.<br />Before, with the GlassFloss filter, I was hoping to vacuum it out and make it last 6-months to a year.  After a few months, I tried vacuuming it out but with all the folds and crannies, it was very cumbersome and time consuming.  Who knows if the vacuum was able to remove the small stuff like P 2.5 too.<br /><br />With the less expensive Accumulair filters, I can justify swapping them out every 3 months like I should.
Rating: 4 stars