Installed upon arrival. Seems to help with the grandkids allergies. Been using for almost 30 days and I do not have to remember to buy a filter at the store or when to change it out.
I'm a big fan of promoting products made here. The only issue with the filter was on me. It's a little smaller than the 4 x 20 x 24 I usually purchase. I'll have to move up to the 25" filter the next time.