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I use this HEPA machine in my bedroom 24/7. It's helped dramatically with my many allergies (I just found out the allergies are causing my asthma that I've had for 9 months).
The only gripe I have with this machine is that it states that it's "Quietcare". On high, this thing is pretty loud!
However, I had a more inexpensive model (I think it was Honeywell 50010) and it was deafening, so this is an improvement.
Otherwise, this machine is giving me EXCELLENT results. I can sleep through the night without my eyes watering or dry mouth. It's improved my breathing (my family tells me 'I sound better') and helped with my snoring problems. At the price they're selling it for here, I'd pick one up. If noise bothers you just keep it on the low setting.
It really is a good product!

I bought three of these units to place in our home. I have one in our bedroom, one in my office and one in the family room. These units do a very good job of cleaning the air. The secondary carbon filter really shows up how much dirt is being taken out of the air (dust really shows up agains a black carbon filter). I clean the carbon filter one a month and replace them (the carbon pre filters) every three months.

The one negative I have for these units is that they are NOT all that quiet due to a less than well balanced fan unit. On low the wabble in the fan is not enough to make too much additional noise, but on high it is really noticable.

The noise can be quite irritable on the low setting and even after 5 months of running one in our bedroom, I still have not gotten to the point where I can ignore it. The sound level (on low) is about the same as a tower type of computer running. On high, the unit sounds like a small hair dryer. If you can sleep with a computer running in your room, this unit will not be a problem if you run it on low. If not, then you might want to consider something else.

Overall, the units do clean the air very well and you have to expect a certain amount of noise due to air movement.

I just bought my second Honeywell air cleaner. Actually I bought 2 more. I bought one 6 years ago and ran it constantly. The motor is finally wearing out. This air cleaner worked great in my daughter's bedroom... she is severely allergic to dust and she has related asthma. It works so well that every week when I go to dust her room, there wasn't much dust to remove. I am buying one for my bedroom as well. I'd like to have one in every room of the house! Awesome product for a great price!

I am a board certified allergist. I have this in my office and home. It is a great little air cleaner. It has a very good fan/air flow. The air filter is very easy to clean. I even clean the "disposable" prefilter by simply using the wand on my vacumn cleaner or a shop vac. The main hepa is rated permanent, I doubt that, I would suggest replacing it every 3 -4 years. I think the fan is noisy, but some people find the sound soothing at night. I run this 24/7. Over all it is hard to beat the quality of this and the reasonable price.

Although this is a louder unit than I had hoped, it does an excellent job, and has improved our air quality substantially. We've noticed vast improvements in our allergies. For the price, it's really a great buy. I am going to buy one for each room.

My model 17440 is now 9 yrs old and still going strong. All of these machines make noise, so get the biggest one you can and run it on a low setting. Personally, the noise level in my apt is rather high and the white noise this machine generates is a big help in letting me sleep during the day.

I never shut mine off, and often use it as a fan to blow air into or through my bathroom as bathroom fans are often too weak to keep towels from mildewing without some way of moving dry air around. To do this I lay the machine down, and until recently, so the fan blew down across the floor. The way the cage fan is made this adds the suction force of the fan to the weight of the fan and motor which wears out the lower bearing a lot faster. Turning the unit on its other side takes almost all of the load off the bearings as the fan suction counteracts the weight.

I recently took my unit apart to oil the bearings, and found the motor to be excellent. Not some cheap piece of Chinese junk, but a real industrial motor. I had to remove a lock collar though that must be destroyed to get it off. Ace Hardware had a replacement collar. Some Pedro's bicycle chain oil worked very well. The unit had developed an intermittent squeak and this fixed it.

The unit tests both the pre-filter and inner HEPA filter all the time and will tell you if they get dirty. The only thing I have ever done to the HEPA filter is use the vacuum crevice tool to suck any dust particles off the outside of the filter.

I have NEVER had to replace the HEPA filter on my unit. It came with 3 pre-filters and I use my HEPA vacuum cleaner to suck the dust back out of that while it's still on the round HEPA filter unit. Since I have some pretty bad allergies, I do this with the vacuum cleaner pointed into a steamy bathroom right after a shower so any tiny dust particles get bonded to water molecules. I know that's a pretty anal procedure, but I also have migraine headaches, and after 9 yrs you learn a thing or two.

The first one of these I bought after trying about 5 other small non-HEPA filters. They were a complete waste of money. I went from taking 10 Sudafed a day to none ever in about 3 days. It does take awhile for your system to "unload" all the toxic effects of allergens, but the upside of that is a few hours in a dirty environment won't dose you enough to get you symptomatic as long as you can sleep in a clean environment. If you use it cleverly it will even keep mold out of your house by circulating air all the time. This thing could easily last 20 years with good bearing maintenance.

This is by far the most valuable appliance in my house. I can't imagine the misery I'd be in without it. On low settings it costs almost nothing to run. I rate it ninety two stars. :D

Just buy it and get your life back!!!

Originally I purchased an IFD air purifier. They simply don't work.

To replace the IFD air purifier I purchase the Honeywell 17000. The unit works really well at removing dust and other airborn particles. The unit is not as "whisper quiet" as the model name would suggest - but I do not have trouble sleeping while it is on. It sounds like a small box fan on a low setting - which is not too bad at all really.

For the price - I would highly recommend this unit over others.

I love this air purifier. It's very effective and very reliable. I have allergies, and this has been a life saver. All of my air-borne related allergies have been noticably reduced. If fact, I recently bought a second one. There's no substitute for a true HEPA filter, and this one is a dandy. And, unlike many purifiers, this filter is PERMANENT. The carbon pre-filter needs replacing every few months, but they're inexpensive. This purifier is virtually maintenance free, and it has a 5-yr warranty.

But be warned: when placed on the "high" setting, this purifier is as loud as a freight train during a tornado storm. So the term "QuietCare" is highly misleading. The noise is tolerable on low and medium, but the high setting is anything but "quiet."

When I'm sleeping, I like a background fan noise, so it works out fine for me. But if you're trying to watch TV or listen to your stereo, you'll need to turn this off or move it to another room. I have a second one in my basement that runs 24/7, so the noise level is irrelevant for that purpose. This would garner 5 stars if it weren't for the loudness on the high setting.

Several people have commented that this product is too noisy. Either they got a "bad" one - or I got a really good one. With the unit barely 5 feet away from me, and my TV on with just medium volume - I hear absolutely no "mechanical" sound and just a very pleasant "breeze" sound. And that is exactly what this machine is suppose to do - move air.
I even put some essential oil on a cotton ball - hang it in front of the air outlet and the fragrance is "breezed" all over the room. Absolutely Great Product.

Don't be satisfied with dirty or dusty air in your home. It can be harmful and unhealthy but with an air cleaner it'll be fresh and filtered just for you. The Honeywell 17000 HEPA QuietCare Air Cleaner is made to operate quietly, so you won't be disturbed as it works. It'll take out all the nasties in the air and leave it healthy as can be. Protect your family from the dangers hidden in the air, this works, really.