Castle Filters, One-Year HVAC Furnace Filter, Black, 20" x 20” x 1”

I thought this was great idea and quality but my AC tech told me to ONLY use the super cheap $3 filters from Walmart. All the others make the AC work too hard including this one! :(

I like it - traps a lot of dust. I did replace it after 3 months rather than a year.

When my replacement filter arrived it was damaged. the replacement filter was here in less than a week, no problem. Just vacuum it of about every 3 months and it does a great job!!

Just ordered my second one.

I love this thing.

So, one filter one year. Good idea, bad execution. No matter where you live, the filter is going to get dirty in the course of a year. I found the faintest suggestion that you should blow it off once in a while.* It's a good filter. Three layers of various density foam stuff. Middle one is sticky for some reason. Maybe that's just me* When the filters begins building it's collection of dust and dirt my AC struggled, usually a monthly thing.* It has the usual style of casing. Criss cross to keep it from being sucked up** Big con here: case is cardboard, not even cardboard, like a shirt box - and the layers of sponge are so thick that my little air compressor could not get all the dirt out.* Tried the vacuum. Started messing up the little paper crisx cross areas* No problem. Take it apart and wash it. THEY GLUED ALL SIDE SHUT. So I had to tear one end to get the foam out and actually clean it.* Big pro here: there was so much gunk caught in those foam pieces I have to use the power setting on the shower to get it clean and it took 15 mins before the water ran clear so it's cleaning the air for sure.* Big disappointed: it's nearly impossible to get it all back together without destroying the flimsy shell and I was not successful until I left out the sticky middle layer.Summary, it's a quality filter concept just needs a little tweak on the shell if they want to advertise it as a one year use. ** Fyi I still clean it monthly because gross.Update: way overdue, can't believe I forgot to do this. I was contacted by the company immediately after my review posted they asked me questions about my concerns, about my house and HVAC system, and about my personal cleaning habits. They proceeded to educate me afterwards in a super friendly manner about the layers, what they do, and why you should never, ever touch the sticky layer if you want your filter to work right. Then, even though this was clearly my bad, they suggested, based on my description of performance, that I needed a different level of filter. So they sent me another for free! Even though I messed up the one, they sent me what they thought would be the correct one, advised me to keep the old ones as backup and followed up after the new ones arrived. Amazing customer service and mine has worked perfect since! Perhaps every one should call and get a personalized recommendation for the filter level first and avoid the confusion!Thanks Castle Filters!

Just as advertised. Fast shipping. Wonderprice

I've been using this filters for 5 years and I've been really satisfied with the product AND customer service response/treatment. Although the price is similar to the sum of 4 3-month filters, you save hours from buying/storing/installing/trashing 4x the filters.