Has anyone checked with an HVAC person to see if these could harm your system by deteriorating the airflow? Kinda like clogging an artery?
1674214
Been using these for 8 years now and airflow is fine. Just keep them clean and it filters great. I have had no issues in the eight years of use. They are not that thick, just filter. I change monthly.
1674215
Hi Lexa: Please read my review where this was answered. Yes, I have checked with many and they nearly ALL agree that these "secondary filters" should only be used as necessary on a limited basis. As I mentioned previously, I would suggest only using one or at most two of these to help supplement the existing whole house filter you already should have in your HVAC system. I am only using one of these filters in our kitchen which seems to accumulate more debris. Many HVAC contractors insist that these secondary filters are unnecessary and limit airflow making your fan motor work harder. This could result in decreased life expectancy for your system. My strong recommendation is to change your regular whole-house filter at 30-60 day intervals depending on your use. Hope this helps!
1674216
I don't understand why this would strain the fan if the vents give you the option to be closed .. Wouldn't that be worse?
1674217
Yes, My technician told me that the Register Vent Filters strain the motor causing early failure of the motor and having the Register Vent Filters in place at motor replacement will void the warranty. I use them for obvious reasons and to prevent small objects from falling into the vents also. Not sure what I will do in this case since they help so much!
1674218
I took mine out within a day as they seriously limited airflow to those rooms. I threw away the rest that I had purchased.
1425323
I've not had a problem...as others have said, be certain that fan has area free for air flow.
2169599
I've used this item in vents and in my air purifiers...they are wonderful collecting lots of dust and other particles that have some size...I have never usedthis in an air conditioner...I think you might want to take CTgreens suggestion and try one thats a lot finer for the air conditioner...Give it a try...you'll have answer soon...you can always use this filter for other things...They are wonderful to use in ADDITION to filter in HVAC vents...You will be surprised!!!
1322849
have you noticed any difference after cleaning the filter since it is not replaceable? did it damage it? that is a concern because i am definitely looking for a hepa air purifier with a pre-filter..
195059
I would call the company, but I am really concerned about why the tubes do turn brown. Mine did too and it made me worried that it could be hurting my arteries.
2270803
There is no filter ... you could open the lamp compartment remove lamp and visually inspect to see if any blockage of air flow, but if there were overheating there is a warning lamp on top of unit which should be blinking,red i think.Otherwise idunno...
748204
I have never had that problem, but they must be kept clean. Perhaps it's time to buy a new compressor.
1605628
Yes, their filters have an awful smell when first opened and used. I have found this to be true for the 4 years I've owned the machine. Blueair claims the filters aren't toxic but I don't believe them. I let it un on speed 2 for 2 days when I know I won't be here and that helps air them out
522900
NO. Do not use these. These will NOT PROTECT YOU FROM ORGANIC VAPORS. They are only meant to filter out an odor that would be safe to breathe without the filter. Hence the label "Nuisance Filter". Crazy and confusing. You need a properly designed filter for those dangerous chemicals and a website forum is not the place to get that information. You should contact 3M directly.
1011869
I haven't had any issues. I think there would be more issues with older piping. I live in an older house, but we've recently had new piping installed.
866391
I did not have that problem but I would definitely return them. They could have been depressurized if they were sent to you via an airplane flying at high altitude. This is definitely not normal.
493910
I have three units, and I've not had this problem. Could it be the intake is obstructed? If you use peat pots, it is possible some of the material from the pots has plugged some of the misters. I placed my pump inside a nylon sock to filter out any particulates.
820923
I have 2 installed. Yes they are suppose to. I have 2 of the larger brass ones. I think those work better. I replaced one of these with the larger brass one. I have these smaller ones on the basement zone and seem to work fine. From what I was told the knob has to be screwed in. the air will still be able to get out. I had one of these that did not seem to do the job and just put the brass one in. Everything is fine now. Just started the furnace last week and no air in the system. I think these small ones with the knob on top can leak. The one of mine did. Some one else said the same thing.
1961726
Yes, we just purchased a home that had been "winterized" which means no airflow for weeks. It smelled a little musty, especially in the basement. I turned the central AC fans on and pointed this at the air intake with fan on high and ozone on low. Next morning when I returned to check on it the entire house smelled absolutely clean.
1845824
Not that I see. I have been using them consistently for air fresheners and never had any kind of issue (essential oils and water, etc.)
1543816
No, we were told that it should be fine by our heating and cooling installer. However, if it is a a lit of the fins, it can affect air flow. I would check with your installer to be safe.
497089
These might cause the fan to increase the noise if running at full speed, but this is expected from any filter. I would only install them on intake fans, they really catch a lot of dust.