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Woodworking Plans Are sealed or ported enclosures better for bass guitar? ... Any speaker will produce sound in any cabinet, but optimizing the ... Many great designs violate this.

DIY Inside Dog Kennel

I Finished My Basement

Save Money, Get more Space, Learn Something New and Fun

by Jason 107 Comments

Do you buy air filters for your house?  What am I saying… of course you do. Just about everyone does.

Woodworking Planshow to Woodworking Plans for Are you over paying for air filters?

You probably are.   I did.  For 7 years I overpaid.

Then last year I discovered that if I buy them here online in bulk it''m not a conspiracy nut or something like that.  I''s start with why I''t matter what these stand for what matters is the MERV is a universal industry rating and FPR is a made up rating by the manufacturer.

I talked with Sanjay, at my Home Depot in Reston VA,  for about 30 minutes about this and he said he didn''t tell me what the equivalent FPR would be.

Really Sanjay…?   Well that''m mad at HD because without the MERV rating it''s the same at Home Depot or online.

Orders using Amazon Prime get free shipping. If you use this Amazon affiliate link I already have the sizes and MERV rating in the search box, you can just adjust it to find what you need.

Here''s pretending to be a creeper. Kids love boxes!

Order an Entire Box

If you''re going to buy filters, no matter what, so you might as well save time and money.

MERV 8, The Only MERV for ME

Use MERV 8.  You don''t notice a difference (fewer symptoms) go back to 8. Try a dedicated air filter appliance instead.

Don''s strictly a marketing plow.  I''re mis-leading and over priced.

Woodworking Planshow to Woodworking Plans for By the way, the brand I buy is called ''.  But it really doesn''s spring or fall and you''s just sitting there it''s not greyish then don''t delay changing it because you want to save money.  An A/C unit with a dirty filter uses more electricity to pull the air through - I did the math (yes, I''re losing more money by not changing it.

3 Tips to make Filter Changing the Ultimate fun

I use this knife for other things, but above all its my air filter knife.

I now have about 12 years of house ownership experience.  So I like to think I know a thing or two about how to do shit around the house (pardon my language, but I''ve learned along the way.

1. Dedicate a knife just for filter changing.   Here''s really stuck in there.

Woodworking Planshow to Woodworking Plans for 2. Protect your carpet by using the plastic or paper from the new filter to hold for 1 last update 2020/07/03 the dirty filters until your done. I have 3 to replace upstairs, this makes it easy.2. Protect your carpet by using the plastic or paper from the new filter to hold the dirty filters until your done. I have 3 to replace upstairs, this makes it easy.

Woodworking Planshow to Woodworking Plans for 3. If you buy the wrong size (not that I did, I''… suppose you did) outline the size you need and use some scissors to cut it.  Works fine without the frame on two sides.

Final Word on Air Filters

Buy them online and save about $60 on a box of 12 versus a retail store.  For me, with 4 filters types (1 in the basement and 3 upstairs) I saved  $239.36. 

WOW!  I shocked and saddened that I had so much to say about air filters.  But… it must be said. I''ve got some more filter knowledge or tips.

Cheers -  Jason

I am an affiliate for Amazon. This means that if you use the links in this article I earn a small commission   This in no way affects your price nor does it influence my opinion of the company. The commission I earn helps support this website and fund my future basement theater room. Just wanted to be upfront with you.  Thanks for supporting the site!

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  • 7 Basement Finishing Secrets (the pros won''''http://0.gravatar.com/avatar/6fc9c957da31b23a49a90858bbcf641d?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/6fc9c957da31b23a49a90858bbcf641d?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-28375''Reply to Matt''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''re rating nicely comes in at a 9, which is higher than 8. Of course, a lot of people won''s a 9 on a completely different and arbitrary scale. So they charge more because you "" you''re just paying more - a lot more. - Jason

  • Jack Woodworking Planshow to Woodworking Plans for says

    Woodworking Planshow to Woodworking Plans for ...but this filter goes to 11.. sorry - but i digress

  • FLR the 1 last update 2020/07/03 sayssays

    Woodworking Planshow to Woodworking Plans for This is incorrect. MERV 8 for 1 last update 2020/07/03 is roughly FPR 4 or 5. For example, the washable WEB filter is sold at HD with FPR 4 (green coded) and MERV 8 elsewhere. The red coded FPR 7 filters at HD are roughly MERV 11 and the purple FPR 9 are roughly MERV 13. We don''s FPR test is proprietary, which is ridiculous. The goal is to induce you to buy the over-priced purple or black filters.This is incorrect. MERV 8 is roughly FPR 4 or 5. For example, the washable WEB filter is sold at HD with FPR 4 (green coded) and MERV 8 elsewhere. The red coded FPR 7 filters at HD are roughly MERV 11 and the purple FPR 9 are roughly MERV 13. We don''s FPR test is proprietary, which is ridiculous. The goal is to induce you to buy the over-priced purple or black filters.

  • Lori Messegee says

    Jason,
    I love your emails. I am currently finishing my basement by myself. You are an inspiration when I am feeling lazy and a wonderful source of knowledge. And all this presented with a bit of humor! Thank you!

  • Michael J West says

    The reason you want atleast a Merv. 8 is because your evaporator coil is about a merv 8 rating and whatever the filter isn''nofollow''comment-reply-link''#comment-382968''Reply to Michael J West''''http://0.gravatar.com/avatar/6fc9c957da31b23a49a90858bbcf641d?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/6fc9c957da31b23a49a90858bbcf641d?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-28376''Reply to Matt''''http://0.gravatar.com/avatar/98e4e6d4bbf8a3d57b895e6671b06493?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/98e4e6d4bbf8a3d57b895e6671b06493?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-32094''Reply to Bubba Bouy''''http://0.gravatar.com/avatar/646fa97325589562692bbc7ae209da11?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/646fa97325589562692bbc7ae209da11?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''t see how it''re right - you do not want ANY gaps along the edge of your filter. And preferably, just buy the right size! - Jason

    • Mike J says

      1) I agree with Bubba, I am an HVAC Tech. Do no cut down filters, wether you feel they are "" or not. This could come loose and get sucked right into the Blower Wheel causing wheel damage and motor failure.

      Woodworking Planshow to Woodworking Plans for 2) MERV rated filters are the only thing I would recommend for cost saving paper filters. Even the MERV 13 filters only catch about 4-5% of all dirt and dust down to 1 micron in size. What you can see floating in the house is 5 microns or larger. This will still cause alot of dirt and dust in the house to be constantly circulated and you will need your ducts cleaned every 5-7 yrs for 1 last update 2020/07/03 per the EPA and field Experience has shown the same. 2) MERV rated filters are the only thing I would recommend for cost saving paper filters. Even the MERV 13 filters only catch about 4-5% of all dirt and dust down to 1 micron in size. What you can see floating in the house is 5 microns or larger. This will still cause alot of dirt and dust in the house to be constantly circulated and you will need your ducts cleaned every 5-7 yrs per the EPA and field Experience has shown the same.

      3) the only way to get rid of 97% of all dirt and dust in the home is an Electronic Air Cleaner. More costly upfront, but will almost eliminate build up on blower wheels/ ac coils (which cause alot of overheating issues), and to breath better cleaner air down to .007 microns in size. This is proven per many studies over the past 7 yrs. They do make them now with disposable throw away media pads instead of using those old Honeywell Air Cleaners with the giant cells that stop working well after a couple of years because nobody cleans them properly. Which brand new they only stopped about 45-50% of all dirt and dust in the home.

      • I did it says I did it says

        I totally agree with Mike J about electronic air cleaners. If installed during new construction or when installing a new AC /heating unit the additional cost is small, $900 to $1,100 range. Since the electronic cleaner is after the filter it is very easy to learn the difference between a MERV 4 and a MERV 8 filter. The electronic filter will be working hard and the static charge will be talking to you.

        • B says

          His comment was straight up HVAC marketing. Duct cleaning is a joke - whatever has settled in your duct is settled. It''s not going to sprout legs and walk out and get you.

          • BWM says

            No... after 26 yrs in the industry I can confirm you are incorrect. It will eventually grow legs...bacterial legs.
            Sure let it sit there in your ducts, collecting moisture, bacteria, viruses and everything else. Studies have shown viruses like the flu stays in your home for longer periods if you have dirty filters and ducts. Dust when gathered to duct walls acts as a filter itself, just collecting more dust... dust mites.. and yes even odors.

            Some duct cleaning companies are sham jobs i agree, but that doesn''s nothing wrong with the dirt under them... heck you could even throw away your broom and vacuum cleaners and save money.

            I''t have them cleaned and pay for extra doctor visits and medicine, increased utility bills, frequent hvac equipment failures and constant repairs, spend more time cleaning house and home stays dirtier than others, keep musky odors in home having friends talking about it, spending extra money on air fresheners. Sure don''t forget about the ones too young for the party, they are hanging out on your lips, playing with their own feces.
            As you fling the covers off because you got to hot in the middle of the night because of your dirty ducts and coil, good ole uncle Sal flew in from a dog pile in your neighbors yard. It was an easy flight because you haven''Ebola `El Virus''Uded''s none other than "" that''ll recognize her 2020 influenza sedan? It''t listen to peope like "" or ""... because they probably think hand sanitizer is a sham because the dirt on their hands wont grow legs. I hope I have encouraged at least some to educate themselves on proper system maintenance for you and your family''t clean the blower wheel? Just the housing you say? Clean the evap coil but not the ducts you say? That''ll have better luck with a "" campaign... you can start by holding your breath until global oxygen levels rise by 3%.

            Peace!

            • the 1 last update 2020/07/03 JamesJames says

              Woodworking Planshow to Woodworking Plans for

              I''t done my own research, but you don''ve been sick. Your body has already created the antibodies cold or flu germs, but it is a common myth that extends to playing instruments that require your mouth. Unfortunately, this does put into question some of the other things you''nofollow''comment-reply-link''#comment-422879''Reply to James''''http://2.gravatar.com/avatar/257914d46f9bc96abb4dcc41a88431b5?s=48&d=identicon&r=g''http://2.gravatar.com/avatar/257914d46f9bc96abb4dcc41a88431b5?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-394477''Reply to Val''''http://1.gravatar.com/avatar/1073a0ddde6569124d3bdf293cecbaef?s=48&d=identicon&r=g''http://1.gravatar.com/avatar/1073a0ddde6569124d3bdf293cecbaef?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-37516''Reply to Mary''''http://0.gravatar.com/avatar/fa6dceb2cdfd507d9c39a8b16f70d382?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/fa6dceb2cdfd507d9c39a8b16f70d382?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''t you?
              And remember, The higher the Rating, the thicker it is and Less Air and heat Gets thru..You will have to Set your Blower to run an extra 1-2 min Longer every cycle...

              Top Electronic Cleaners are the Best.. but Cost $ 2-$300
              and Clean your Ducts! Every Year Minimum..
              a Simple HD Vacum with a 10 ft Extension Hose is all you need.
              Do every Floor Vent..
              Spray with LYSOL when done..

              We also Run a Seperate Air Cleaner In the house.. -On a Timer..
              On Low Speed..

              • Mike J says

                Some info on electrostatic filters. These only have electrostic properties right when the motor turns on and then dies off quickly. Not very effective and more of a gimic.

                I am a HVAC Tech and pleated filters, metal washable or even plastic washable only collect a small amount of the dust in your home. I explained in an earlier reply to Jason about some of the Benefits to Electronic Air Cleaners. Keeping the blower and ac coils clean and keeping your ducts clean are just the mechanical and air flow parts of air cleaners.

                I always educate my customers on the for 1 last update 2020/07/03 differences of filters to air cleaners. My own Brother was one of them. Used $1 mesh filters and had 2 surgeries on his deviated septum for Allergy problems. For Christmas a couple yrs ago I Installed the Air Cleaner and UV light for germs in his system and he is now virtually symptom free for 2 yrs. And it was like pulling teeth to get him to do it. Now he can''nofollow''comment-reply-link''#comment-188652''Reply to El Toro Dave''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''ve never heard of the stacked air filters. Seems like a reasonable idea to me. The "" word is kind of tricky when talking about filters because HVACs can get starved for air if you get too efficient. This combo idea has merit to me. - JasonI always educate my customers on the differences of filters to air cleaners. My own Brother was one of them. Used $1 mesh filters and had 2 surgeries on his deviated septum for Allergy problems. For Christmas a couple yrs ago I Installed the Air Cleaner and UV light for germs in his system and he is now virtually symptom free for 2 yrs. And it was like pulling teeth to get him to do it. Now he can''nofollow''comment-reply-link''#comment-188652''Reply to El Toro Dave''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''ve never heard of the stacked air filters. Seems like a reasonable idea to me. The "" word is kind of tricky when talking about filters because HVACs can get starved for air if you get too efficient. This combo idea has merit to me. - Jason

            • Woodworking Planshow to Woodworking Plans for Alan says

              Merv rating also relates to how it handles particles of different sizes. 8 is plenty to protect from dust that accumulates on the blower and coil while balancing with a low pressure drop.

              Higher is more about smaller stuff that might bother your breathing. But the air passes the filter many times in your home so even if it''s Merv 0 allowing big dust particles to pass ( and even though it''m not an expert but... ""comment-reply""189361""4706""comment-189361""respond""children""comment odd alt depth-2""comment-418600""comment-header""comment-author""comment-author-name""says""comment-meta""comment-time""comment-time-link""http://www.ifinishedmybasement.com/thats-just-life/air-filters/#comment-418600""comment-content""comment-reply""418600""4706""comment-418600""respond""comment even thread-even depth-1""comment-190974""comment-header""comment-author""comment-author-name""says""comment-meta""comment-time""comment-time-link""http://www.ifinishedmybasement.com/thats-just-life/air-filters/#comment-190974""comment-content""comment-reply""190974""4706""comment-190974""respond""children""comment byuser comment-author-admin bypostauthor odd alt depth-2""comment-191070""comment-header""comment-author""comment-author-name""http://www.ifinishedmybasement.com""comment-author-link""external nofollow""says""comment-meta""comment-time""comment-time-link""http://www.ifinishedmybasement.com/thats-just-life/air-filters/#comment-191070""comment-content""comment-reply""191070""4706""comment-191070""respond""comment even thread-odd thread-alt depth-1""comment-191094""comment-header""comment-author""comment-author-name""says""comment-meta""comment-time""comment-time-link""http://www.ifinishedmybasement.com/thats-just-life/air-filters/#comment-191094""comment-content""fudgy""comment-reply""191094""4706""comment-191094""respond""children""comment byuser comment-author-admin bypostauthor odd alt depth-2""comment-191115""comment-header""comment-author""comment-author-name""http://www.ifinishedmybasement.com""comment-author-link""external nofollow""says""comment-meta""comment-time""comment-time-link""http://www.ifinishedmybasement.com/thats-just-life/air-filters/#comment-191115""comment-content""rankings""comment-reply""191115""4706""comment-191115""respond""children""comment even depth-3""comment-195982""comment-header""comment-author""comment-author-name""says""comment-meta""comment-time""comment-time-link""http://www.ifinishedmybasement.com/thats-just-life/air-filters/#comment-195982""comment-content""inefficiency""efficient""comment-reply""195982""4706""comment-195982""respond""children""comment byuser comment-author-admin bypostauthor odd alt depth-4""comment-196098""comment-header""comment-author""comment-author-name""http://www.ifinishedmybasement.com""comment-author-link""external nofollow""says""comment-meta""comment-time""comment-time-link""http://www.ifinishedmybasement.com/thats-just-life/air-filters/#comment-196098""comment-content""comment-reply""196098""4706""comment-196098""respond""comment even thread-even depth-1""comment-193101""comment-header""comment-author""comment-author-name""says""comment-meta""comment-time""comment-time-link""http://www.ifinishedmybasement.com/thats-just-life/air-filters/#comment-193101""comment-content""comment-reply""193101""4706""comment-193101""respond""comment odd alt thread-odd thread-alt depth-1""comment-193294""comment-header""comment-author""comment-author-name""says""comment-meta""comment-time""comment-time-link""http://www.ifinishedmybasement.com/thats-just-life/air-filters/#comment-193294""comment-content""comment-reply""193294""4706""comment-193294""respond""comment even thread-even depth-1""comment-193310""comment-header""comment-author""comment-author-name""says""comment-meta""comment-time""comment-time-link""http://www.ifinishedmybasement.com/thats-just-life/air-filters/#comment-193310""comment-content""w.c. pressure drop at 600cfm. The media is a little pricey, typically $40-50 on line, with free shipping if you buy a couple. They''nofollow''comment-reply-link''#comment-193310''Reply to Michael''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-193324''Reply to Jason''''http://1.gravatar.com/avatar/1fff3bb0c97c3a2970b8b8dd5858fd70?s=48&d=identicon&r=g''http://1.gravatar.com/avatar/1fff3bb0c97c3a2970b8b8dd5858fd70?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-193390''Reply to Jim''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''s hair galore down in the basement. Might need a Roomba Robot too! - Jason

          • Pucha says

            Hello Jason, thanks for the information and the same for all the others that have contributed!!!!! I agree with everything you say but in my experience I think that I will go with a Merv 11 (FPR Red 7 at Home Depot brand) or any other Merv 11 online, I find a cleaner environment inside the house. Not higher because then it will probably limit the A/C performance. I will try something next time I change filters: I have a HEPA filter vacuum and will try to clean the dirty side of the filter and see the results, in this way perhaps I could extend the filter life for one more month, multiply by 12 filters package means and extra year!!!!!! Will post in the future about my experience, thanks once more indeed!!!!!

            • Woodworking Planshow to Woodworking Plans for Jason says

              Hi Pucha - Yes, I can see that. It''m not as picky about air quality but I get it. Thanks for commenting, please do let us know your results. - Jason

          • Brad says

            Woodworking Planshow to Woodworking Plans for Hi Jason - I found your article here when I found myself in the same predicament. A few months ago we had a new A/C system installed, which came equipped with one of the huge 20 x 25 x 4 '' filters. The installer mentioned it would last ''; I was skeptical, and sure enough just a few months later I found it to be plenty clogged. (yep, we have cats and dogs) The filter was a Honeywell, with a MERV 11 rating. Off to Home Depot I went, finding the ubiquitous FPR numbers. They offered a 2 pack of '' filters for $40.00, or a single '' filter for $30.00. The 2 packs were sold out, and I needed it now, so I bought the FPR 10 one. When I opened it up back home, printed on the filter itself, not visible from the outside packaging, was ''. Hopefully this information will help someone else. You can bet I will now be checking out the various online filter vendors. Thanks again

            • Jason for 1 last update 2020/07/03 sayssays

              Hi John - I understand your confusion. This is precisely the thought process the Home Depot marketing department hoped you would have. And listen, I love Home Depot, I shop there all the time, they are a great store.... except for air filters.

              MERV 8 is not the same as FPR 4-5 (Green at Home Depot) FPR 4 is a lower quality filter. I bought both a MERV 8 filter and a FPR 4 and you can tell just by looking at them that the 8 is a higher quality. I would love to be able to just buy a lower cost filter, I hate spending money on these things... but... ALL of the HVAC guys I''ve commented on this article have said - don''nofollow''comment-reply-link''#comment-197336''Reply to Jason''''http://2.gravatar.com/avatar/e9042ac94cb687f2f9d337176af90935?s=48&d=identicon&r=g''http://2.gravatar.com/avatar/e9042ac94cb687f2f9d337176af90935?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''ve serviced all run factory air filters (Marv 4) unless they are specifically designed as an air cleaning and purification system. If you want to clean your air without decreasing the life and performance of your HVAC system, get an air cleaning and purification system.

        • OC_Carl says

          This off topic, but given your excellent information I wanted to point out a few presentation problems:
          Like the first sentence, "". I guess you did not ask your wife to proof read?
          Also you quote "" above when I really think you meant to quote "" (Webster''nofollow''comment-reply-link''#comment-197601''Reply to OC_Carl''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''s and grammatical mistakes. Yes, this blog post gets updated often. I recheck pricing and the Home Depot filter product by actually going to Home Depot to take a look. So yes, some of the comments may be older than the post date.

          Glad you like the post, I hope it''nofollow''comment-reply-link''#comment-197610''Reply to Jason''''http://0.gravatar.com/avatar/687742d48bd2b285c700785ecca85a24?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/687742d48bd2b285c700785ecca85a24?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''s why I subscribed . I want to warm and cosy my basement . its also increases the 1 last update 2020/07/03 my homes value etc; however , with the proper information it can be awesome. It will be slow going ,however when done my basement will look great thanks to this site and you.
          Michael a. MassettiGlad you like the post, I hope it''nofollow''comment-reply-link''#comment-197610''Reply to Jason''''http://0.gravatar.com/avatar/687742d48bd2b285c700785ecca85a24?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/687742d48bd2b285c700785ecca85a24?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''s why I subscribed . I want to warm and cosy my basement . its also increases my homes value etc; however , with the proper information it can be awesome. It will be slow going ,however when done my basement will look great thanks to this site and you.
          Michael a. Massetti

        • Dave says

          The previous owner of my house had the filter placed in the space after the blower, and there wasn''nofollow''comment-reply-link''#comment-199588''Reply to Dave''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''s hard for me to picture this setup your describing so let me know see if I can answer the question with a general guideline - you want to filter the air before it gets to the furnace / air handler. The filter is to keep the air clean before getting to the sensitive components of the HVAC NOT to clean the air on it''nofollow''comment-reply-link''#comment-199644''Reply to Jason''''http://0.gravatar.com/avatar/6f585f2345d1021cdce61fd928661a9b?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/6f585f2345d1021cdce61fd928661a9b?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''s what i''t get them anywhere, not even grainger sells them.

          so when dealing with old ductwork, which has been sized for an older unit, you don''ll invite critique for this, however i use 20 inch box fans as air cleaners with merv 8 filters behing tham. i for 1 last update 2020/07/03 have five that i run. (big house) and since then, my furnace filter replacement has gone to every four months.so when dealing with old ductwork, which has been sized for an older unit, you don''ll invite critique for this, however i use 20 inch box fans as air cleaners with merv 8 filters behing tham. i have five that i run. (big house) and since then, my furnace filter replacement has gone to every four months.

          Woodworking Planshow to Woodworking Plans for at my workplace, our air handling equipment is attached to our johnson controls metasys building control software, and the air handlers have manometers which alert us to increased pressure drop across the filters we use. we the 1 last update 2020/07/03 have never received the alert in the 8 years i''s, changed every four months. those units are fully cleaned per the filter change change schedule.at my workplace, our air handling equipment is attached to our johnson controls metasys building control software, and the air handlers have manometers which alert us to increased pressure drop across the filters we use. we have never received the alert in the 8 years i''s, changed every four months. those units are fully cleaned per the filter change change schedule.

          a note-if your a/c condenser, usually outside, is running--don''re getting a new install-try to site this part of the system in the shade.

          great for 1 last update 2020/07/03 blog.great blog.

          • Jason says

            Hey Larry - thanks for the input on the HVAC and Merv filters. I''s good to hear from someone with some experience! - Jason

        • Andrew says

          I can''t buy in store and haven''nofollow''comment-reply-link''#comment-210219''Reply to Andrew''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''s a big filter!

  • Reply
  • craig the 1 last update 2020/07/03 sayssays

    The reason a higher MERV filter can damage the HVAC blower is because the blower is designed with a specific MERV and pressure drop in mind. Higher than spec MERV would mean more pressure drop, and would require a stronger blower motor.
    Therefore, if it were possible to upgrade the motor, then a higher MERV rated filter would be acceptable.
    There is one other factor to consider before increasing the pressure drop associated with a higher MERV filter: the filter seal must be good, otherwise the dust will pass around the filter.
    If the HVAC could be set up with a sufficiently strong motor and filter seal to support a higher MERV filter (e.g., MERV 13), then it seems like a very good place to do the filtering.
    I recently puchased an excellent HEPA 13 vacuum cleaner (Miele) and the difference dumbfounded me. Also other changes: stick to solid floors no carpet, no padded furniture, a lightweight bed frame that can be easily moved and clean, , airing out the matress on both sides when not in use.
    My dry mouth problem, sinus problem, body itching and acne problems all went away.

    • Jason says Jason says

      Couldn''nofollow''comment-reply-link''#comment-264563''Reply to Jason''''http://0.gravatar.com/avatar/cd366b6b8965a7e3047bc3901de07fed?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/cd366b6b8965a7e3047bc3901de07fed?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-306350''Reply to Rudy''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''m going to swing by my the 1 last update 2020/07/03 local store this week and see if I can confirm - thanks for the heads up. - JasonCouldn''nofollow''comment-reply-link''#comment-264563''Reply to Jason''''http://0.gravatar.com/avatar/cd366b6b8965a7e3047bc3901de07fed?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/cd366b6b8965a7e3047bc3901de07fed?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-306350''Reply to Rudy''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''m going to swing by my local store this week and see if I can confirm - thanks for the heads up. - Jason

    • Jared says

      The MERV ratings are clearly listed int he Specifications subsection on Home Depots product page if you scroll down. It''nofollow''comment-reply-link''#comment-371745''Reply to Jared''''http://0.gravatar.com/avatar/97bbd02492cacf366a6810d8f172b10d?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/97bbd02492cacf366a6810d8f172b10d?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-306501''Reply to Theresa''''http://1.gravatar.com/avatar/a97586094f38073de7919046873d6c5c?s=48&d=identicon&r=g''http://1.gravatar.com/avatar/a97586094f38073de7919046873d6c5c?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-350395''Reply to Eric''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''ve never used them myself, but my general understanding is that they''nofollow''comment-reply-link''#comment-350693''Reply to Jason''''http://0.gravatar.com/avatar/c26c7aa6be3e8c8eefb1fc1688097ad8?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c26c7aa6be3e8c8eefb1fc1688097ad8?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-350818''Reply to Julian''''http://1.gravatar.com/avatar/7c57907b703b9c538afba9efb1997e0b?s=48&d=identicon&r=g''http://1.gravatar.com/avatar/7c57907b703b9c538afba9efb1997e0b?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''s say a MERV 10 Honeywell from HD vs a Rheem FPR 4 from HD? Hard to find that data on the specs, and A/C repair guy said it didn''nofollow''comment-reply-link''#comment-376995''Reply to Dan''''http://1.gravatar.com/avatar/dc071ed38c4e60c2fb62670e6f99a13c?s=48&d=identicon&r=g''http://1.gravatar.com/avatar/dc071ed38c4e60c2fb62670e6f99a13c?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-378261''Reply to JZ''''http://0.gravatar.com/avatar/c2985405d291bcd461e1c9f0642c207c?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c2985405d291bcd461e1c9f0642c207c?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''s a Brand New Unit! If you state that buying A/C Filter''t we keep our Vehicles in Tip Top Shape? I do! All my Mechanical Goods are in the best of Care. Can''nofollow''comment-reply-link''#comment-385477''Reply to Gayle''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-385707''Reply to Jason''''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/c6d58f7202c8f91c08ce84d51a542ba9?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''m no HVAC expert but that sounds like your cold-air return is undersized. It should not be sucking so hard that it distorts the shape of a common filter. Regardless, you may be forced to continue to purchase insanely expensive filters to solve your problem.

      Best of luck,
      Jason

    • Paul says

      I purchased Rheem FPR 4 filters at Home Depot. They are manufactured by Flanders and so is the Naturalaire brand. On the official Flanders website they show the name brands they manufacture for. If you open the Rheem icon and look at the specs for the Home Depot FPR 4, it states the equivalent MERV rating is 8.

    • Steve James in Lexington SC says

      Thank you. It is now 2019 and I see that this article has some dust on it (pun intended), but it is basically timeless information. I recently took over filter changing from my fired HVAC company. I had a pile of MERV 8s in the basement. I pulled out some dirty MERV 4s (those cheap bums!) and noticed quite a difference between the two designs. Now I can hear the air whistling in through one of the returns - just a little bit. Suddenly, I want to know about MERV vs. drag. I am pretty sure that the new MERV 8 has more drag than the dirty MERV 4 had - but what about the drag on one brand of MERV 8 vs. another MERV 8? Just because two MERV 8s filter the same particle sizes does not mean the drag is the same on both ... and the drag is what costs money EVERY MONTH. I am a mechanical engineer, so I could be over-thinking this. Theoretically, one brand of MERV 8 could "" cost me $25 a month more than another brand of MERV 8. MERV has noting to do with energy efficiency. It measures particle removal efficiency by percentage.

      One super fancy MERV 8 could have (in theory) half of the drag of a cheap MERV 8 - and they both remove the same percentage of particles (thus they are both MERV 8s) A using a manometer, a "" (see Youtube) on a system with various MERV 8 filters would tell if this is even an issue. What is the pressure drop across one brand vs another? It is the static pressure drop that hints that filters need to be changed in the first place!

      So the MERV 8 is more expensive than the MERV 4 ... and it will get dirty faster because it is catching more stuff ... and it will put more drag on my HVAC fan on day one (or give me less air flow and make my HVAC run longer) ... and even more drag when it get dirtier than the MERV 4 could ever get. Suddenly, I cannot help but wonder if the MERV 4 (which is NOT recommended) might be the better choice?

      ... but my wife also has allergies. All of these variables are dynamic while the industry spins the BS wheel as good any anybody in Washington.

    • Woodworking Planshow to Woodworking Plans for joan for 1 last update 2020/07/03 ridgewayjoan ridgeway says

      I used paper filters for several yrs and my house stayed dusty and never cool like it should, I got my local owned hardware store to order me case of the old fashioned blue filters. I will never go back to paper, my house is not dusty anymore, stays so much cooler, and my electric bill dropped alot, plus I only pay 22$ tax included for 12 filters verses 20 for 2. And I change when needed, but all around better for me with the old blue ones.

    • David says

      First off, thank you to everyone for such great information. I see multiple companies selling the replacement filters (eco-aire, enviroflow, filterbuy, aerostar, airX, tier1). I know there has been lengthy discussion on MERV ratings, but I haven''nofollow''comment-reply-link''#comment-417397''Reply to David''''http://0.gravatar.com/avatar/6862ce24b141006728efbcdf11021f62?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/6862ce24b141006728efbcdf11021f62?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''nofollow''comment-reply-link''#comment-422255''Reply to Bubba Guarino''''http://0.gravatar.com/avatar/0dfc375e4b955ff13f658dbdbdb7a99b?s=48&d=identicon&r=g''http://0.gravatar.com/avatar/0dfc375e4b955ff13f658dbdbdb7a99b?s=96&d=identicon&r=g 2x''avatar avatar-48 photo''48''48''t matter and that MERV rating is the only thing that does. I would trust companies like 3M or Honeywell to sell filters that perform according to their MERV rating. My experience is with an Amazon''t have as much reputation to risk as the big brands. There''nofollow''comment-reply-link''#comment-422887''Reply to John Wong''required''required''hidden''comment_post_ID''4706''comment_post_ID''hidden''comment_parent''comment_parent''0' />

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