Bests & Worsts Reviews from Amazon

I own the prior version of this air filter. The HealthPro series from IQAir has no equal. Prior to owning my last IQ Air I owned a number of competitors, which after some time all broke. They were not the cheap models, spending over $200 on most units. Typically they would last anywhere from 2-5 years then fall apart. You will not find a better air purifier, this removes the tiniest of particles, with each unit tested (you get the output). Also, for any sort of odor, the PLUS model has a 5lb active charcoal filter... and removes odors like no other. Filters last a very long time. Based on typical useage... if you run about 10 hrs a day, figure 18 mo on the pre-filter, the v-5 (active charcoal filter only on plus model) will last about 2 years, the HEPA lasts about 4ish. It is dependent on the amount of dust and small particles though, but even then I would think that you would just have to replace the pre-filter more frequently. Same goes with odors, if you have odors from lots of places you may need to replace the active charcoal filter more frequently. If I could alter one thing on the unit, it would be great if they had some way to recharge the active charcoal filter (i.e. if you heat active charcoal to 200 degrees for 30 minutes you destroy organic material in there). But you can't have it all and no one does that. My HealthPro Plus (the old model), was purchased in 2002 and has run 24x7 since then, yes 13 years with no issues. So now onto the comparison. - The new model is much quieter, I'd say that on any given speed, the new unit is as quiet as one level down. So if your old unit on 4 is fine, you can run the new unit on 5 and it will be the same noise level. - Wheels, it seems silly but the old model wheel system was horrible. They attached but didn't like to stay on. The new unit is much much better with no fall off.