- Purifies air by circulating negative ions that attach to dust and allergens
- Contaminants are then collected by a replaceable dielectric sheet
- Virtually silent; runs 24 hours per day on minimal power
- Deodorizes cigarette smoke, animal odors, and cooking odors
- Conditions home or office rooms up to 500 square feet
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Product Details
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Product Description
Amazon.com Review
Breathing the cleanest air possible is essential to the health and well-being of asthma and allergy sufferers, infants, and the elderly. Hoover’s SilentAir 4000 purifies air without a fan or filter; instead, it circulates negative ions that attach themselves to particles of dust, dander, mold, bacteria, and other pollutants that are commonly found in home and office environments. Instead of letting those polluting particles fall to the floor, the SilentAir traps them on its positively charged Dielectric Collection Sheet. Even the minutest particles that escape most air filters are trapped by this system. As a result, air in rooms up to 500 square feet is conditioned, cleaned, and deodorized as irritants and allergens disappear. Virtually silent, the fanless purifier will not disturb sleep or create drafts. And, with no motor or moving parts, the purifier requires only 4 watts of power to operate, resulting in power costs of less than $4 annually. Six dielectric colleting sheets come with the purifier, which should be changed every three to four weeks. A three-year warranty covers the purifier against defects. --Ann Bieri
Product Description
SilentAir Purifier - Advanced Electrostatic Technology traps many tiny contaminants that HEPA Filters can miss - Helps Purify the Air
Customer Reviews
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Most Helpful Customer Reviews
115 of 118 people found the following review helpful:
3.0 out of 5 stars
Works Great but Be Careful,
By Poppy Mama (New York, New York USA) - See all my reviews
This review is from: Hoover SilentAir 4000 Ionizing Air Purifier (Kitchen)
I bought this air purifier when Jenn-Air had the license. I had the run-around when it broke down almost two years after I bought it. The servicing was by a company called ClareVale (sp?)and they had no intention of helping me. Luckily I bought from a great store in NYC and they replaced it so I bought another one to have two total. When I needed more collection sheets two years later (each lasts one month), I couldn't find them anywhere and the units weren't sold at the store anymore. Now I understand why I couldn't find collection sheets this past year, the license was being switched to a different company! Thank god I held onto the purifier. Unfortunately Amazon isn't selling extra sheets but I found them somewhere else online ... The quality of this purifier is excellent! I do however strongly caution anyone who uses it to keep it at a minimum of one foot from any wall or anything else because it will leave a black ring around the unit and could possibly ruin a nice paint job or good wallpaper since it does not come off easily. (I have an air conditioning unit that will never be the same). I highly recommend this machine for its quality and huge difference it made on my breathing, but I cannot give it 5 stars because of all the hassle I had with it. Since this is a new company (Hoover), maybe there will be an improvement in service and maybe bring some stability, but the collection sheets are too expensive now. ps Be careful to keep the dial on the correct strength for the room size, if it is too high you will get a distinct "ozone" smell.
96 of 100 people found the following review helpful:
5.0 out of 5 stars
Perfect!,
By
Amazon Verified Purchase(What's this?)
This review is from: Hoover SilentAir 4000 Ionizing Air Purifier (Kitchen)
For years now, I have become congested and have had difficulty breathing every time I go to bed. I have tried every kind of allergy medication, prescription nasal sprays etc. I even recently had nasal surgery to help the problem. But nothing really helped UNTIL I purchased the Hoover SA4000 Air Purifier. Now, when I wake each morning, I am completely UNgongested and breathe very clearly. Additionally, I now enjoy better nights' sleep and lack the sinus headache that I commonly had before I purchased the air purifier. It is everything that Hoover advertises and I like the idea of replacing the collection sheets (which the Hoover uses)rather than just wiping a collection plate clean as one would do with the more expensive Sharper Image air purifier. Since the collection sheets even collect bacteria, the idea of throwing it away is a lot more appealing than that of wiping a collection plate clean and possibly leaving some yukky contaminates behind. After years of congestion, difficulty breathing, and tons of money spent on allergy medicines, treatments, and even surgery, I can finally and literally breath easier. Go get one or two now!
20 of 20 people found the following review helpful:
5.0 out of 5 stars
Great machine,
By
This review is from: Hoover SilentAir 4000 Ionizing Air Purifier (Kitchen)
I currently have two large, expensive Austin HEPA filters, and one Hoover (it was Jenn-Air when I bought it) air purifier, with the dielectric collection sheets. I use the Jenn-Air (Hoover) in my bedroom because it is totally silent...AND because it freshens the bedroom like magic, with a clean, fresh, neutral odor like the air after a thunderstorm. I've had the unit for years with no problems, and the collection sheets are available online. Expensive, yes, but a snap to change. I do leave them in a bit longer, perhaps, than recommended. I've checked the collection sheet when the red light has come on, and left it in...checking it 2 weeks later, it definitely had more "junk" on it, indicating to me that it was still doing its job. Saves a bit of money, but I guess one wouldn't want to push it too far. Oh, I also have two "plate-type" purifiers at my office, and while they, too, do a nice job of freshening the air, it's a disgusting chore to clean the 5 little "blades" every few weeks.
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