Side by Side Comparison of: Kaz vs Honeywell

This is the second one I have bought so there is the best review for this air purifier from me. On high it is noisy and I like that when I sleep, a definite white noise I personally find soothing. On low it is reasonably quiet for the work it is doing. The lights are a bright blue in a dark bedroom so I just used some black electrical tape to cover them up. I like to change the pre-filters often so I found a website that sells generic versions that are just as good and lots less expensive than the name brand. Since I love the noise on high at night and used black tape to cover the lights, there are no drawbacks for me using this. It works well, the air smells cleaner, I have used my first one almost constantly for almost a year, I think. All good.

I keep this unit sitting in my living room area in a corner on top of a piece of rustic furniture. The white noise is very calming and the unit does an amazing job at removing dust from the air. I ordered several charcoal filter back-ups and switch them out every few weeks to keep the Hepa Filter from getting dirty. Winter time this runs 24 hours a day non-stop. I would highly recommend this purchase.

We have had this running day and night for 3 years and it is in great condition. There are no strange rattling noises or clogs like you see in some other air purifiers. It provides a nice ambient noise and it not too loud (on the lowest setting).We have noticed a significant decrease in our allergies and in the dust in our home.Replacing the prefilters every 3 months is a breeze - you just unscrew the bottom, unwrap the old one and wrap the new one onto the HEPA filter. (We do it outside to reduce dust in our home).Great product!

My wife and I have allergies and needed something with more air cleaning capacity than one of those little units you can stick on your desk. ThisMachine is powerful and moves a great deal of air. If I crank it up to full power it is really quite loud. It does make a big difference in the amount of dust that we see accumulating on surfaces like table. More important it really does help with the allergies. We bought a second filter of this type about a month ago,

This was a replacement for an older model of Honeywell and I like this one a lot! Really does the job good of cleaning the air of pollutants and bird dander (I have a Cockatoo that are known for their very fine dander). It is very easy to clean and I'm able to use the vacuum cleaner to vacuum the filters. I'm very satisfied with this unit.

Very satisfied with this air purifier for my living room and dining room areas. Living in a vintage home I lease I have no control over how dirty the heating duct system is. I change the HVAC system filter once a month but the air just did not seem clean and the visible dust accumulation o tables etc. was heavy. My nose was always stuffy also. This is a fairly large unit, however it is very efficient, I physically feel better with more energy and my stuffy nose issue is gone. I run this when I am home. Dust accumulation is reduced. I have a tower "hepa type" unit in my bedroom that I will be replacing with the smaller version of this unit. I now see there is a big difference between "hepa type" and a pure, true Hepa air purifier as this one is.. Also, last year we had a fire nearby and the visibility outside was less than a city block so you can imagine what the inside air quality was like. In that we seem to no longer have winters or rain in California unfortunately I think this air purifier will be pressed into service again to clean smoke from the interior of my house. I could not be more pleased with this unit

I subtracted 1 star for two issues that need to be addressed by the company.1) removal of the ridiculous blue LED light - it will kill your sleep patterns until you disassemble the machine and remove it from the circuit board2) the lack of sanitation by way of a UV-C bulb that would not produce ozone. This product only mechanically filters - which is nice. But it would be nicer if it included a couple technologies from the last 10+ years.This device would be a home run if it had a UV-C bulb operating above 240nm (preferably 253.7nm) to purify (kill germs) the air in addition to cleaning it (removing particles), all without creating ozone. Sadly Honeywell was a bit cheap here. A ridiculous benefit would be an ozone generator on a 4 to 10-minute timer per 24 hour period to keep the ppm down.Definitely looking at mid 40dB to 60dB which is a little louder than smaller room models. Wouldn't trade this one for the world though. I also have owned the Honeywell 17000s since 2008 which is probably 5-10dB quieter, but maybe only does 1/3 to 1/2 as much air. The Honeywell 17000s I can tolerate on loud in the next room over or medium in the room I occupy. This 50250 I have to run on low or medium. High is just too loud unless vacuuming/etc.This 50250 filters way way way way more air than the 17000s though. It's not even close. I used the 17000s in college for a dorm room and it was great. But for a 1300sq. ft apartment with 2 bedrooms the 17000s cannot do the living room very well. This 50250 combined with the 17000s in the living room bring me back to feeling how the 17000s felt in a bedroom. I'll eventually get 2x 50250's in the living room and put the 17000s in the bedroom to hold me over until I replace the HVAC and add the parts that any decent home should've had during the building process.I still think the blue lights on the machine are BS and I will probably disassemble at some point and remove them from the circuit board. Things need to stop coming with lights and beepers.Additionally, I kind of wish CFM was readily listed. CADR & sq. ft are both the wrong units to measure volume and air changes (which you want 2 to 9 per hour) depending on what you're doing or how bad your asthma is. I guess companies use these measurments to seem more "relatable" to consumers, but it really just feels like a cover up.The best answers on every air filter would be:CFM, dB, filter % by micron size, filter cost, replacement interval, yearly watt usage---> all listed by in a chart by speed setting (low, med, high).Companies just don't want you to know if they're really the best or not. Such a shame it's left up to red boxes, bold text, and random marketing/lobbying.*note* I did have to disassemble the 17000s after 2-3 years of running it because the motor was making bearing noise. I greased it with Pennzoil and it ran fine for 5 years then I did it again with some Amsoil nlgi #2 and haven't' had any issues since.

Researched a lot before purchase. Decision came after talking with cousin who's son suffers from Cystic Fibrosis. Very serious Lung/stomach disorder. They live in A.Z. I knew she did her homework as well and her son, now 16, is thriving! I recently moved and have been sick with sinusitis and sore throat, stuffy nose from the get go. I believe it comes from carpet but I'm a renter so it won't be getting changed. Even the Cat is sneezing. I notice people claim immediate relief. I get that as the fresh air that comes out, as for now, I live in N.Y., is nice and cool. I believe that soothed the very irritated sinuses. Thus, fast relief. I've had it for a few weeks now and the difference is great. I run it 24/7. I live in a 1BR condo with large LR, DR, Kitchen, BR and entrance way. I keep it in Living room during the day and BR at night. I am waking up, finally, not extremely sick. I noticed when I put it in BR and fell asleep on the couch in LR I woke to a stuffy nose after about 2 hours. As soon as I got in the BR it began to clear. I would give it 5 stars except the noise does drive me a little crazy. I'm sound sleeper so doesn't bother me at night. However, in LR when watching TV it's annoying. But~ I guess it has to be that way to push the air so it is what it is! The price was right and soon I plan on buying the smaller one to keep in BR permanently instead of moving from room to room. However, it's not hard to pick up and move. Has handle to make it easy and I'm not so strong. Also read comments about the fan going off a bit and making noise. Some video showed how to fix it. I heard the sound, but it went away and all seems good for now. Should the issue occur it looks easy enough to fix. Best wishes in your breathing and hope my review has helped!

Love this filter! There is a sense of more cleaner and crisper air. I am a severe allergy sufferer so I am willing to try anything/everything to make my home environment better. Ever since I brought this I don't wake up as stuffed up. I also like the fact that it has 360 degrees vents. The only thing that stopped me from giving it a 5 star is that it is super noisy when on its highest setting, definetely can't sleep with it, on its lowest setting its good, it kind of sound like a quiet ac unit.

Three months of non-stop operation and it is working really well. The purifier has noticeably helped my asthma, and the scent of 3 dogs has diminished as well. The top speed is loud and so I rarely use it at that setting which is a bit of a drawback when trying to clean the air. The middle setting is left on at night and when we are out, as it is also a bit loud. The lowest setting is quiet, and does not interfere with conversation, TV or radio listening. The directions indicated it might stain carpet if left, so I have had it sitting on a low table. I haven't seen any residue from its use.

I got this with Amazon warehouse deals for only $89! It said it was "used" because it was repackaged and there was less than 5% damage to the top of the unit. I got it and there was NO damage at all and it was NOT previously used. I saw a black scuff which was probably the 5% issues that's why it was marked down, but that rubbed right off with my finger. The high setting is pretty loud but the medium and low settings aren't so bad. I slept with the low setting on last night and didn't even notice the white fan noise. I have been sick with a stuffy nose but my husband said he woke up this morning and was breathing clearly. I have dogs and cats as well. They don't bother me so much but come this spring I hope this helps with pollen and what not. I always get miserable for at least a month. We will see. I live off a dirt road as well so everything is always dusty in my house which. I hope this helps with that! I would recommend this hepa unit. I gave it 4 stars only because I am not noticing anything yet because I am sick. Physically it feels like the air is cleaner. I plan to get another one once I move.

I ordered this unit as a replacement to the Honeywell 52500. The 52500 is still running great, but I moved it into the upstairs area of my home and got the new one (50250) to take it's place downstairs. The 50250 is basically the exact same unit as the older 52500 with minor cosmetic differences. The controls are a bit different as the new one has a blue led light and two filter change reminder indicators and reset buttons. The only other big difference is the older model came with casters (wheels) on the bottom. The new unit does not come with the casters. This is why I knocked off 1 star. The unit is large and bulky and is much easier to move around on wheels. The new unit needs to be picked up and moved. I have a bad back, so this to me is significant. The unit is not very heavy at all, it's just bulky and kind of hard for me to move around without the wheels. Also, the new unit is made in Mexico whereas the older unit was made in the USA. The new unit seems to be a bit quieter during low speed operation and about the same volume at full blast. So far, after running it for one day, it seems like it's doing just as good of a job cleaning the air as the old model. This is a great unit new and old and will dramatically improve your indoor air quality.

This unit has great air flow which is important for proper air filtration. It seems to clean the air well. Unfortunately it is to noisy for a bedroom at over 55dB on low speed. The frequency is also a bit high which adds to the apparent noise level. This unit would be good in an office or other work area.Also the thing has a bright light on the knob that can't be blocked. Additionally it is blue which is worse for sleeping.

Be aware that this air purifier is loud, substantially louder than other air purifiers we've used, including others by Honeywell (even at lowest setting). At night, it's actually a good white noise machine if you don't mind a loud fan noise while sleeping, but this wouldn't be good in a setting where you need it quiet. Also, there is a surprisingly bright blue light that is impossible to turn off, so if you're planning to have this in your bedroom, be prepared to be annoyed by the light. We ended up covering the blue light with post-it notes and tape, which of course looks really janky.

Requires a lot of Maintenance. To use this properly one needs to replace the other carbon filter every 3 months and vacuum the inner hepa filter. Only when you buy this does it come with an exact fitting outer filter. The replacement filters all needs to be cut to fit.. this is very messy and time consuming. The inner Hepa filter is not designed for replacement. If you read through the question section it seems that the Honeywell 50250 which is a different model than the Honeywell 50250-s have replacements.I don't want to spend $50 replacing the Hepa filter with one that fits the Honeywell 50250 and not the Honeywell 50250-s.I dont think that the exact manufacturer Hepa filter is sold for this unit. Once the filter is depleted which has been estimated at roughly 3 years, it wont do much good.The unit uses a lot of A/C and is expensive to run... I have heard it on full power eats 180 watts. This unit seems to work best at full power to rid the air of dust particles that one can see flying though a beam of light. It does seem to collect in the outer filter a lot of dust at the end of the 3 month cycle, so I assume it works as far as cleaning up the air or improving it to some extent.The air does smell and feels fresher especially when placing a new outer filter and vacuuming out the inner Hepa. Or when new.Some have complained about the noise. I haven't experience a problem personally with the noise. It is important the unit is completely standing on a flat surface. Any tilt and the unit will make a lot of noise.

I've waited a few months before reviewing this Air Purifier because even now, I'm not really sure if it does anything. I bought this in May (it's October now) because we moved into a new house and both our dogs started going crazy scratching and they were miserable. I was unsure if it was outside or inside conditions causing this distressing issue (poor things were scratching and biting themselves raw). Our new house has a lot of carpet that we will not be able to replace completely for a year or 2 due to the big expense to install hard wood floors, and outside we have a lot of trees, both pine and oak so it could be something to do with pollen. Either way, I was desperate to relieve their discomfort. I bought this and put it in our bedroom, hoping that if it is pollen or carpet issues, that they could find comfort when sleeping or hanging out in that room.I've had this running constantly since May and I have to say that I do not see any difference between our bedroom and the rest of the house. The purifier is LOUD! Not just fan loud, but even on low it's drown out the TV loud! I don't actually mind that at night because I like white noise and it keep the "girls" from barking every time a pine cone hits the roof of the house or a car drives by.But I will say this, I have not had to dust the bedroom any less than the rest of the house. Dust still appears on the lamp shades and the furniture, and the area around the device gets annoyingly dusty. I have this near a window with blinds and drapes and both the blind in that specific window and the drape need constant dusting. I don't know why.Also, I did not notice any difference in the way the dogs felt after using this. My partner has allergies and uses an inhaler, and he has not noticed any particular cleaner air in the bedroom either. So really, I just do not know if this is working. We can not see or feel any difference in air quality in our home, so I really can't recommend this item as a definite help to anyone.As far as the dogs, it appears that is was a seasonal allergy and by the end of June they had worked out of it. I don't know what next spring will bring, but I'm hoping that their systems have had time to get used to the new plants in the area and hope that we will not have the same issue again!

I've used this filter since November 29th, in the main room of my 1BR apartment. In a 400 sf (square foot) apartment, this unit is far too loud for comfort. I'm sure it works fine, and it definitely does it's job well, but it is constantly vibrating and makes a very loud humming noise, even on low. One of the other problems I have with it is that it only has three speed settings, it should have more so that people can use it more continuously. Due to the inferior technology of the motor and blades, I'm going to return it and get a Winix. I would only recommend this to someone who owned a house and was NOT planning on using it in or near a bedroom where someone sleeps, TV room, or any other sound-sensitive place; and the second condition of the requirement would be if the person also couldn't (or didn't want to) buy a more expensive unit, as this one is very cheap for it's rated air flow. If anyone is interested in finding a more quiet unit, I've been using a Holmes 756-U for a few years now, and it's been fantastic. Very quiet, 4-speeds, great air flow and filtration, and Holmes customer service is great. The first Holmes filter I had was the 726 unit, and when I kinda broke it while trying to open it up (impossible to do, I think..), I just sent Holmes an email and they right away offered me the 756-U as a free replacement. This was after 3 or so years of using the 726, which is a great warranty and customer service on their part. The only downside to the Holmes units are the cost of filters, which are overpriced.

Let me start off by saying I won't repeat the tech specs as other reviewers have. This review is strictly from a user's point of view. I have 7 dogs. I have hayfever and asthma. I have central air in the house. That being said, I wanted something to put in our TV room/kitchen area as that's where we "all" are most of the time. I will update this later to let you know if this helped with dog dander, smells etc. Too soon to really tell. It's very loud on high speed. Medium is better, Low is ok -- you can still hear it. You need to place it 3 feet from a wall or furniture. Make sure you have enough room. Not the most attractive thing to have out, but if it reduces the nasty air, so be it.Set up was easy. It has a handle to carry it. Wish it came in another color, as it's very WHITE and sticks out like a sore thumb.Will update in a few weeks to attest to it purification capabilities.

Here's the problem.... I purchased the unit in March this year (2017) , it sat in the box for a couple of months before I opened the unit and placed it in my bedroom, which had a previous air filter which didn't do much and never seemed to get dirty (filter media). That was a leading brand that was described as an almost hepa filter, pretty unit nice design but didn't really do much. I have some allergies and noticed after running the filter I was sneezing a lot more than when I didn't run the unit. After about a half dozen uses the unit emits an intolerable odor that has some characteristic of solvent and almost a vinegar like cast. I've called kaz several times and they recommended shaking out and vacuuming the pre filter carbon which I did, that helped reduce the sneezing problem but the odor has become even stronger. They told me to open a window and place the unit without the prefilter for a day or so and run max to air out the filter itself. I noticed the plastic horizontal "ribs" around the unit have several areas of a yellowish "drip" on them almost like they were cracked and then glued together.... this was out of the box.... I'm certain the odor doesn't originate int the house or the room, nothing like it occurs except when running this filter... it is a mystery, I'm calling it contamination in the unit when I received it.

Honeywell is actually great, mine came and was returned as it had a "replacement filter" in it so it was not NEW as sold. It even had written "replacement filter on the side of filter. The real filter has several layers and is true Hepa. The one that came with this you can hold up to light and see right through the one layer of cheap looking (fako) filter. This was maybe a refurbished model for sure the filter was not real as I have the authentic to compare.I tried ordering replacement filter and got a fake one. Then I ordered this entire "new" Honeywell to get past fake replacements out theret and the alleged "New" in box entire unit arrived and had a fake filter in it so ...go figure!

It's very hard to tell if it is outperforming my homemade box fan filter. It definitely pushes more air around and I am hoping it filters out the fine particulates. It had trouble filtering out the smell of smoke from the kitchen/neighbors cigarettes. In combination with the home made filter the air felt really clean.I like it and i feel like it will work better in the long run because the homemade fan filter needs to be replaced every 2 months or so before it is black with junk. Allergies is the same reduction as with the home made filter. The blue LED sucks but is tolerable.It's really hard to write a review about a filter tho. It does what it is supposed to I am guessing. Maybe I should buy a air particulate measuring device...UPDATE:After a few months of using the filter I have decided that a box fan with a filterite filter works better then this device. The prefilter picks up dirt, the Main filter seems clean still. Setting up a new Box Fan Filter and that filter has turned grey because of the dust that this honeywell missed... We still have both running but I would not suggest buying this Honeywell filter and instead look into building a fan filter. Total costs are about the same over the year but the fan filter works better.

As a scientist and engineer, I purchased this unit some time ago, and can't use it at night because it is too loud. I have purchased two other units, including the Whirlpool Whispure Air Purifier on Amazon. The link follows: (http://www.amazon.com/gp/product/B00440EKRG/ref=oh_details_o06_s00_i00?ie=UTF8&psc=1)For the details, see my review on the Whirlpool unit. The Whirlpool unit on low has a 300 CFM air flow rate and is only 31 dB in my 28 dB background room (you can hear it, but it is very quiet). This Honeywell unit is 52 dB (very loud) on high at 300 CFM. Cutting it to low cuts the flow to 100 CFM, and the noise is still 36 dB, about 5 dB louder than the Whirlpool. Get the Whirlpool unless noise doesn't bother you.

Update: after 4 years of usage the motor went out. I contacted the company and they agreed to send me a new unit, but I first needed to send in the old one. The shipping cost was $90!! I wish the company would have sent me a new one first and I could have used the old box, and that would have saved me some money. More over, they should have covered the shipping. I'm not happy with the warranty coverage.Previous Review: This air purifier is large, and the instructions recommend that the unit to be 3 ft from the walls--which means it takes up a large footprint. It really easy to set-up and run (it took about 5 minutes to unbox it, install the carbon air filter, and turning it on). The air in our bedroom was surprisingly crisp after running it for a few hours.There are a couple things to note.-First, this purifier is loud, even on the quietest setting. In our case, the purifier just replaced the white noise machine my wife use to have. On the loudest setting, it is just a bit quieter than a vacuum cleaner.-Second, it comes with a bright blue light. This light is seriously bright! It lights up the whole room. I've attempted different methods to cover the light, but it is so ridiculously bright. It's so annoying, we have considered returning it for something different.-Lastly, we bought the discounted "opened-box" version. It was totally worth it. The box had been opened, but all the original packaging and manuals were there. If it is an option for you, it is worthwhile.

Let me start by saying that I ordered 3 of these machines for our home and have been running them for about 2 weeks now. Until now no problem. We run them on high 24-7. Its loud but we like the white noise as it helps the kids sleep and stay sleeping which is always a good thing. :)The problem occurred when I decided to order a 4th machine. It arrived at my office where I turned it on and immediately the room was filled with a fishy plastic type order that was unbearable. After reading a few reviews on Amazon about this problem I decided to return it and requested a replacement. Amazon replaced the machine and the new one arrived today. I set it up in my office turned it on and a slight fishy plastic smell started coming out. I decided to give it a try and left to grab a bite to eat for 20 minutes. When I came back and opened the door I started coughing badly. The room was filled with that smell. 3 other co-workers confirmed the smell as well.I called KAZ the number listed in the packaging materials. They said it was possible that the odor stuck onto some of the machines during manufacturing and they are not sure what it is. He said you can run the machine outdoors for 24-48 hours and it might help clear the smell.I decided to return it a second time and give it one more shot. If a 3rd machine arrives and has the same problem I guess I will have to look for another filter.I only hope that the smell is not toxic as it can affect many people who have compromised immune systems and are trying to breath healthier air. My advise is try and find this machine in store and see if they will match the Amazon price, then before purchasing turn it on and run it inside the store before taking it home.

Unfortunately threw out th box so can't return. When it came it had a couple deep scratch marks but box wasn't damaged..... that should have been my first clue. On high, there's something clanging around inside the motor that makes an obnoxious sound. So, I can only keepbit on low or medium.

BIg as an ottoman & noisy

Very noisy. Light at to control dial is too bright and obnoxious. Would never buy another.

Usually this unit would receive a much higher rating as I own several of them but the last two are complete garbage. The reason I own so many is because I have allergies and love dogs: enough said. I have units in every main room of my house and some of the units have been running for 5-6 years non-stop. The last two I purchased in July 2015 and the last one November 2015. The one from July just stopped working and needs to be replaced. This unit that I am writing about however is a lightly used unit that is on for only 4-5 hours a day. Tonight it started to make a loud wobble noise and it would appear the main fan housing / bearing has worked its way free of the fan and is making a racket. The unit otherwise is only four months old and in perfect condition. Honeywell seriously needs to sit down with its Mexican plant managers and get quality control back in order. I own 8 units but will not be buying another one after the experience I have had with the last two units. This one will have to be sent back to the factory for repair or replacement. I'm very frustrated!!!!!! Time to build things in AMERICA again. Thanks for nothing Honeywell!!!! Update: 3-31-16 - Both units have been sent back to Helen Of Troy- KAZ Return department. This is the subsidiary of Honeywell that builds these units and handles warranty work and replacements. Both units mentioned above have been shipped back and I am awaiting the arrival of new ones. More issues to mention; While the people are very polite and easy to deal with at KAZ, this is a typical large warehouse organization and the process is like pulling teeth. After receiving your return authorization number, you have to send a letter along with the air cleaner and repack everything. Bad enough that you need to purchased a box, packing peanuts and tape and then spend a half hour doing the packing job but KAZ does not reimburse the consumer for the shipping or any of the packing materials. The total cost to ship the unit back to KAZ plus the cost of shipping materials cost almost as much as the new unit that they are sending. Essentially you receive a five year warranty that is worthless because you are better off spending another $25.00 to $30.00 and going to the store and buying a new unit versus wasting half a day on the phone with the KAZ warranty department plus packing materials, packing the unit and then shipping the unit. Its sad because these use to be the best units on the market and that is why I have 8 of them. The new units however are garbage!!!!!!!!!!!! Save your money and look for air cleaners from other manufacturers. Very Sad Indeed!!!!! Kaz needs to reimburse consumer return shipping costs otherwise the warranty is worth nothing!!!

The lowest setting is SO LOUD. High pitch whine is annoying. The older model which my brother has is nearly silent. Bummer! Wish I could buy the old version.

Well, I missed the return window and that's on me for not opening the box using it right away. I'll figure out how to fix the unit if possible but I can not recommend the purchase of a refurbish Honeywell 50250-S. From day one it didn't work right. I could trick it in to running by spinning the fan manually to get it moving. I used it 3 times that way and then it stopped working entirely. Read the return policy!