Filter-Monster Branded Replacement Compatible with IQAir HeathPro Series Pre-Max Pre-Filter

It fit perfectly and easy to install. Good quality. Good value for money.

Perfect drop in replacement.

Cheap and fits. I don't have an AQ meter so I can't verify that they are as good as OEM but they SEEM the same.

Have had the IQ Air cleaner for over 20 years, and these filters work great. They last a long time and are perfect for our very expensive unit.

Fits perfectly Cheaper than name brand replacement Appears to be constructed well

This was an individual filter purchase (pre filter) out of a pack of three that we normally order. This individual filter is just as good as the one in the 3-way pack we normally purchase. Since the pre filter is the first one to catch any particulate, it's the one that needs replacement most often. As always the packaging is top notch in a sturdy box, which is important because the filter needs to be pristine in its plastic wrapper to be effective once installed. A good quality filter.

It didn't seat completely flat in the housing like the OEM does. I couldn't hear an air leak, and it looked like it probably still had a good seal. Nevertheless, I cut some styrofoam to get a better fit. I just got one each for HealthPro Plus and GC Multigas, and it's the same issue for both respective parts (two separate parts, first/bottom filter). It annoyed me just enough that I might pay the extra for OEM next time. Weight and look is good; seems like similar to OEM quality at least at a glance. Filtration is great per a Dylos laser air quality monitor with all non-OEM filters. Is it exactly as good as OEM? I don't know without doing extensive testing, but it's great filtration.

Fits perfect. I suppose it is working as well as the original OEM. I would buy again.