Hm 400 ( White) by Austin Air

We now have four of these units in our home, as our allergies are terrible. They run 24/7/365, usually on level 1, except for during allergy season where we will run them on higher levels. These are great at helping our allergies and cleans the air inside our house. I actually appreciate that they give a clear time limit for their filter life of max 5 years. The only thing is that they are becoming more and more expensive. The first one that I bought about 15 years ago was around $300, and now they are over $700, and filters are around $250 and rising as well. They do what they claim though, and I appreciate how well they work, so we will continue to make the investment every 5 years to replace the filters, our allergies are worth it. We have one in each bedroom, and then one in the living room. On level 1, they are difficult to hear, but on level 3 they are obtrusively loud. It can be nice white noise at times though, but know that at the highest setting it is considerably loud.

Good quality, useful for furniture smell removal, a bit noisy when turned to high speed

Working in a the remodeling trades for over 41 years we bought the first unit to remove water proofing smells from shower walls. the large unit worked for years and did a good job removing the chemical smells over night. the unit runs for years and we still run it 25 years later... how ever the past few years with wild fires in our area we needed to buy a few more units. The price is more the doubled and the last two unites came all bent in shipping and had to be sent back. it is not a quite machine when running on medium and full speed in your bedroom.

We bought a new couch and chair for our living room. The off-gassing from VOC's was intolerable for me. I could not breathe or be anywhere near the new furniture. This machine cleared all the smells out right away and now I can sit in the living room. I won't be able to sit on the chairs for some time since they are still off gassing but at least now I don't have to stay in the bedroom with the door closed! This is a great product. Not too large like some air purifiers and very easy to set up a use. I could not be more pleased with this product.

Simple, solid construction. I have bought multiple units and they all arrived with imperfect paint, falling dial stickers, etc. Quality control is not one of their strengths, which is disappointing given the price. However, the design and filter performance is very utilitarian.