Any experience with Nordic Pure air filters?
They have MERV 12 filters of various thicknesses and sizes fairly cheap, with low pressure drops, but I never heard of them until recently. I can't find any opinions or reviews about them using Google (except one, someone complaining about their order getting crushed during shipping). Has anyone used them? If possible I'd like to find out about defects, weaknesses or concerns before I buy a case...
Compare with MERV 11 filters from other suppliers. Same media. Same construction.
Hmm. It wouldn't be the first time MERV ratings were overstated by a manufacturer (3M Filtrete, etc...). It is surprising that MERV claims aren't regulated, requiring certification (like the UL 900 ASHRAE 52.2 certification) with enforcement mechanisms (such as fines for making MERV performance claims without 3rd party certification). I think I'm going to start specifically asking for a UL-900 certification before I buy anything. I asked Nordic, we'll see what their answer is...
Originally Posted by breathe easy
Thanks Breathe Easy!
they *are* certified MERV 12
I received this information from Nordic Pure:
"Test was performed on an assembled filter. The test aerosol was KCL neutralized. " and then named the certification lab.
That sounds legit to me -- I won't go as far as calling the certification lab.
I may order a few to toy with and use them during winter, when allergy season is over (I'm sticking to MERV 13s during summer), as they are a good deal.
I guess I am always the skeptic. Just because the test was done by a certified lab does not mean you are comparing apples to apples.
For example a MERV number should always be accompanied by the air speed at which the filter was tested. I don't see this on their information. I do see a test speed for resistance which is 300 fpm. Other filter manufacturers test at 500 fpm. Generally, the slower the air speed, the higher the efficiency for pleated filters. Hmm!
You mentioned 3M. Actually, their test results are now reliable. They started off in the filter business playing the same types of games mentioned above. Their early Filtrete entries had MERV 12 and MERV 13 numbers and then the air speed in meters per second in very small print. I think the higher ups at 3M saw what was going on and put a stop to it. For several years they had good numbers with consistent air speeds in feet per minute. Now they have actually developed their own system with their own numbers 1050, 1200, 1400 - whatever that means.
thanks for pointing out the fpm effect.
As for 3M, I was referring to their expensive MERV "12" (purple packaging), which a few years ago was downgraded to MERV 11 (oups! I'm not sure that was entirely voluntary. My bet is that some people did measurements and complained). That made me mad, I felt cheated as I had bought a few based on that claim. I still can't believe that their grade just below (the red packaging) is rated MERV 11 as well, because when I looked closely at it I found big gaps (holes) in the media through which sand could get through.
Nowadays, if you go to Lowes stores, the 3M Filtrete "advanced filtration" are rated 1700 (as you say, whatever that means). Everywhere else, the 3M Filtrete "advanced filtration" (same packaging except the number claimed) are rated 1500. What's up with that?
Thanks for the info, BE. Very enlightening. I have used Filtrete filters up to 1500 with no obvious ill effects on airflow. Now I use their 1000, because my understanding is that's basically a MERV 11 filter. I've also used other brands from Home Depot or Lowes rated MERV 11 with no ill effects. I prefer the less expensive brands because I don't need nor want anything higher than MERV 11. But lately most stores in my area offer only 3M in the higher MERV ranges, leaving me little choice. That's why I tried the Nordic Pure from Amazon.
I took note of your comment about their MERV 12 rating. As with so many consumer products, average people tend to assume more is always better. To me, it's bad enough when a company caters to this misbelief. But outright deceipt tells me I need to find someone else to do business with. All things considered, that's how I now view Nordic Pure.
"Each became completely bowed-in as the fan attempted to suck air through the clogged filter." From your earlier post you make it clear that you had too much filter for your system. Obviously, you needed a much lower MERV rated filter. Maybe a flat, non-pleated, MERV 4 or 7? Also, if the filter is "clogged" by particulate, then it sounds like the filter worked very well! I work at NP and talk to customers all day long who think getting a higher MERV means getting a better filter. I always tell them that the higher MERV is only better IF it's recommended for your system. There is no deception on this. As for the the 3M "fpr" system...it's not the ASHRAE 52.2, industry standard "M.E.R.V." 3M came up with it as a marketing device and they will tell you that it is designed to measure filtration for particulate smaller than 1micron. At NP, our air filters are made in Tulsa, OK, and we are very proud of them. We are always available to supply Technical Data sheets or discuss our products. Most respectfully, AMG
These people at Nordic Pure are trying hard to convince people there is nothing wrong with their filters. Their basic claim seems to be that if the filter was clogged, it was working properly. What a load! Their filters clog prematurely because of the crummy materials they use apparently. But the fact they find it necessary to track down online complaints to try to refute them tells me there are many people complaining about their filters. All I know for sure is that I've NEVER had a similar problem with 3M filters. EVER. Not even close. I guess it's like they say, you get what you pay for. Sometimes not even that, as I've learned from reading here on the HVAC forum.
Originally Posted by AMG