A quick background – HEPA refers to a type of “high-efficiency air filter” which captures germs, allergens, dust, viruses and dander using layered filters. While these can be very expensive, the Honeywell Model 17000 and its bigger brother the Model 50250 are effective and affordable. Because I have a smaller room to purify, I purchased the smaller Model 17000.

The Model 17000 is suitable for rooms up to 200 square feet. With air purifiers, you don’t want to underestimate since they work by moving air through their filters. It uses a “permanent” (not truly permanent, you have to change it every 1-3 years) HEPA filter, which you will have to vacuum out once or twice a year. Another thing to note is that these units will make noise; they have fans which circulate the air. Avoid the temptation of getting an “ionic” air purifier because while silent, they will discharge ozone. In other words, silent and possibly deadly.

The box claims to remove smoke, dust, allergens, food odor, germs, bacteria and mold spores. After operating it continuously for roughly 2 weeks, I have noticed a significant reduction in the amount of dust that settles on my computers. While I have no scientific method of measuring germs in the air, I imagine that there must be fewer, considering how effective it has been on dust. The air also feels more pure when you breathe it in. Odors after cooking also don’t last as long.

As part of my initial research, I primarily consulted this comprehensive review: http://www.consumersearch.com/air-purifiers. They also have some other recommendations for central air systems, as well as larger air purifiers if you have a larger area to cover.

Scoring Breakdown:

• Effectiveness – 3/4
  The fresh feeling of the air and the reduced dust make this quite an effective product with a tangible feeling of cleanliness. Still, there are slightly better (and more expensive) options.
• Practicality – 3/4
  The fan makes some noise, which you will have to get used to. It’s certainly not for everyone. Luckily, it’s not an unpleasant sound, and I think the majority of people will have no problem with it.
• Value – 3/4
  While inexpensive for a HEPA purifier, it will still come in around $110 for 200 square feet, and even higher if you have a large area to cover. You may also need multiple if you have several rooms.
• Notable
  Just make sure to get the purifier, which covers the area that you have to purify.

Overall Score – 3/4 Lymphocytes

Rating Explanation

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