The Standard DIY Air Filter Reimagined - The Model G 

Babe wake up a new box fan filter layout just dropped

I absolutely love the scientific approach to making a simple and affordable solution to a common need! I’d love one of those demo units.

I built a model c a year ago for resin printing in the house. It works really well. I didn't want to leave it running all the time, so I used esphome and a DIY air sensor based on a Wemos D1 Mini and the Adafruit SGP40. You can create automations in home assistant to turn on when the air is dirty, and shut it off when the air is clean.

This channel is hand down the best source of information you can get on airfiltration for a home or shop! I hopefully find the time soon to follow your designs!

Great design, and good data. This concept is far supperior to the tape design i've been using for years. Well done sir!

I really appreciate all the work you've put into this topic and sharing your results.

I love this series. When visiting the in-laws with a house full of dogs i whipped up a quick fan+20x20x1 and slept like a baby.

Thanks for this :) I've been building similar units for my basement woodshop and my garage to deal with sawdust and welding fumes respectively. I've been prototyping some refillable frames for activated carbon granules to help with smells too. I just discovered that commercially available refillable canister-style filters exist... Model B with the duct fan gives me some ideas for how to incorporate those

Yo, dis filter design is bomb!

Glad to see videos from you again, love your presentation style!

For box fan noise, I suggest testing the sound levels with the plastic protective grids removed. If you mount the fans where kids & cats can’t reach them, noise should be significantly reduced & flow increased.

I love the air filter studies you do, very thorough and detailed

I appreciate all the time you put into your testing. I've learned so much from your videos!

This is very well done! Thank you for all the hours of research and collating the data

Man, I love how in depth you go with the testing. Very useful, good job!

You’re doing some amazing work!!

This is some legendary work, sir. Thank you!

Always good to see another video.

Thanks so much for the data. Really eye opening

Thank you for all the research and work you do. Indoor air pollution is a severely underestimated problem.

just causally dropping the most anticipated video of the year in the middle of the night

This is an incredible amount of experimenting, data collection, and analysis. Really appreciate you sharing this information as it has helped me decide which way to go.

Thank you for all the hard work you do! This information has really helped.

Looks like a great simple design!

Very thorough and straight to the point. Thanks!

I have been waiting for information on this. Thank you for this. Very informative.

Thanks for sharing your results, especially the various filter brands. It's making me reconsider my go-to brand.

Nice design. Thanks for sharing!

I was just thinking about taping a filter to a box fan. This seems like a more elegant solution

Thank you for all the work you've done for making air filters affordable

It’s great to hear you’re still making improvements to the designs!

Great design and data! I love the scientific approach and appreciate your entrepreneurial spirit. Cheers!

Very nice information. I have wanted to use one of my lasko fans as a filter while I make dust during my home renovation projects. Subscribed!

I think the kit should come with 3-d printed inserts to plug all the dust holes in the fan case. extra points for including fan balancing weights

Thanks for a well done, very informative video demonstration of DIY air filters!

Thank you for all the time and effort put into making these videos! Going to be making one of your model B's!

Looking forward to the next videos on the additional testing data

I love the work you are doing and the rigor you bring to your tests. With how sealed homes are these days, every home can find value with one of these fans. Keep it up!

Perfect timing! Finally had time to figure out which kit(s) I wanted for my needs and this video popped up. Just bought 3 kits 4” premium kits. Thanks!

This is awesome!! I’ll be buying B and G kits next week!!! 🎉🎉🎉

yeah welcome back. Happy New Years!

This is sweet can’t wait for the next video… planning on modifying a design like this to fit into my rafters. Thanks a ton

Thank you for all your hard work in testing. Much appreciated. Surprised to see 3m perform so well.

Wow that looks so nice with the 3m tape too, so professional

Very well thought out design. Seems like all edge cases have been considered and the final product looks to be quite efficient material and assembly wise. Well done!

Great video! Looking forward to picking up a kit.

Great design!

Heeey happy to see you back!

Great video! Excellent advice.

Giveaway?! You are the air king.

Thank you for the opportunity, I've been thinking about trying a filter on a box fan.

excited to see a video from you again! please keep making content!

Great videos - thanks for all the research!

Excellent job, great content.

Love your videos planning on building a model B this spring!

straight to the point, thanks man

Awesome idea and video.

Great update on a fantastic DIY project! Hope I get a filter :) . I've made my own box fan filter to supplement my HEPA filters

This is great. I use the tape design to filter air near my cat's litter box. Works amazing keeping the smell down and dust low

Great design definitely better than my DIY version! Will love to try out this model G kit.

Awesome work. Happy New Year!!

An incredible amount time and energy put into this data and these designs. Thank you. Any thoughts on the economics of using a more coarse and cheaper pre filter that prolongs the life of the primary filter?

I've started building filters based on much of your findings. Thank you so much! Would love a demo unit!

Very great content! Love it.

I've created several similar filters, but I never thought about using foam or rubber feet to make it quieter, keep up the good work.

im gunna need to get that filter for my set ups!

That is a great kit, I hope you sell a bunch! Looking forward to your 2024 content! Happy new year!🎉

I am quite satisfied with my Model G, purchased two, one setup in the basement with the Air King, the 2nd will be shop and future cottage renovation setup.

Very cool!

Your kit is a very nice design. I am starting to get enamored with the filtrete filters as the 1" 2200 which seems to have the same airflow as my 5" MERV 13 FilterBuy. They both perform well though. For the Lasko fan, I decided to remove the intake side grill to get a flatter surface and used 2 12" silicone bands which make the whole process much easier. I like to have the fan/filter blow toward the ceiling so I bought some plastic laundry baskets for them to lay on. I did find a cheaper all plastic fan that was both quieter and produced better airflow and the grill was flat which didn't require any modifications. Saying all that I would have probably gone with your kit if it had been available before I did my own thing this summer.

This is great. I wish I'd had one during last summer's wildfire season!

very nice video .. Thanks

I've been waiting for more of your studies! Glad to see you've been busy at work with these, and even commercializing. I get that your focus is shop air filtration, just gonna point out that a big chunk of the in-home air purifier market might have more priority on noise, VOCs, and anything related to pets.

I have nothing relevant to add-kudos for all your hard work. I’ve taped furnace fans to a 20 x 20 fan with limited success. I’ll be buying a kit soon!

Appreciate all the testing. I'm looking to filter my home because I don't have forced air.

These designs are awesome in my opinion. I have subscribed to your channel. Keep up the good work! I think your model designs are better than Lasko's air flex box fan (box fan with a filter - that is indeed a real product). And I hope you have a happy new year!

great video very informative.

i was thinking about this channel a week ago, thinking he must be busy with the orders and not post a video for a while. I wish I could prototype accessories to sell as a personal business in the future. The product really got better. I think the only limitation for further improvement is the box fan itself which is low depth, inefficient at moving air.

This looks way better than my one with snot green painters tape😅 Looking forward to the 4 filter variations.

You have some big fans. ;)

Was just wondering when we would see a new video from you. Love the comparisons to commercial options

Its weird knowing there are other people out there obsessing over DIY air filters and all the data that goes with it just like me. Makes me feel warm fuzzy. Gonna need a filter for those fuzzies tho...

Thanks again for the great content! I'd love to see a comparison at different decibel ratings. For instance best options at 50 db, 60 db, etc...

I only need one for a small room, looks like a model G would suit me well. And depending on the needs/results I get I will probably look into the 4 filter versions. Not being able to breath properly begins to take even a mental toll.

I've seen people say they can build units with computer fans that despite having slightly lower performance, have massively lower power draw and noise. I've always been skeptical of their ability to work at that static pressure. Have you experimented with this? Edit: NVM I just saw your comment about it. Excited to see more.

We used to use a charcoal version for the grow room back in the day 😅

Planning to set up something like this for my laser engraver

Thanks for all your effort. I was initially confused by your statement to put the filter on the back of the fan. I understand why. my own thinking has been so focused on using these as a filter, I forgot it blows out the front because that's what most people use these fans for. 😅 I'll just put it on the back and turn the fan around so the back becomes the front l o l

Nice suction bro!

1:35 - I would always clean the surface, first with dish-soap and then with Isopropanol. I have some bad experiences with several "sticky-tape" products, but only because of a not clean surface. This set looks very good.

This is awesome. I’d love to see a comparison to the Coway Airmega AP-1512HH Mighty HEPA filter at some point. It’s been the recommended air purifier by NYT Wirecutter for several years, and I’d love to see how it stacks up against the others and against the model G. Thanks for all your hard work!

Have you tried a shroud on the front of the fan? Many Corsi Rosenthal boxes have been tested with and without, and it had been shown to significantly improve performance.

I love to have one please Absolutely love your videos

I've always been interested in filtering the air. My house is very dusty. But buying a filter unit at the store is expensive, then buying the filters are expensive, And I can never remember what model filter each damn unit uses. I have started using a higher quality 2" filter in my furnace ( the largest it will hold ), with a pre-filter to catch dog hair. But that still only does so much. The joys of living in a farm town, and when the farmers start harvesting, or grinding up the chaff after they harvest, The amount of dust in the air is visible. And in a 100 year old house, sealing the house is not really an option. I like the design of this, it allows you to buy simple filters at any big-box store, And hell, could also buy one of those super cheap green filters, to catch the bigger stuff, like cat and dog hair, stopping them from clogging the actual filter ( which is what I do in my furnace ). The best part is, who DOESN'T already own a box fan? So honestly, The kit is probably cheaper than your estimates, as most people probably already own one. Edit: Just wanted to mention. I took an old stanley ( and now a Lasko ) drum fan from walmart, Used cardboard and superglue, and made my own 3D fan using AC filter foam, that attaches to the intake of the blower fan. And I put the filter on a rail system, allowing the filter to slide in and out easily, for easy cleaning. Since doing that, Not once in 5 years have I needed to clean the dust filter from the window AC unit in my bedroom. And I'm the type of person that will turn the AC on if the temp outside reaches even 70f. So it runs A LOT, and never gets clogged with dust. The filter on the blower fan gets CAKED in dust, in only a few months. It works great, and was a fun little project.

Awesome to have you back leading the charge for us 👍. When can we expect the new variations using the CAT fan with a drum filter and/or paper filters?

This is the kind of data consumer advocacy groups should be providing. I bought some merv13 filters from filter buy because they were USA and great price. Immediately knew they were LOW quality garbage. Asked for a return with an explanation that i knew for a fact they were not what was advertised and they promptly gave me a refund and didn't even want them returned so i give them credit, they a are honest liars when caught. The filters were so pathetic i could see shadows behind it . Id love to give that air king a try.

Currently using the ikea filter that I found at a thrift store and all I had to do was change the filter. I assuming it doesn't work nearly as well as what you are using but it definitely is quiet!

Always looking for spot filtration needs.

Really appreciate the effort you put into these videos, was wondering about your thoughts on PC fan air filters that people are discussing on Twitter? They're much quieter than box fans, but I've seen conflicting opinions since they may not be able to move as much air (very dependent on fan brand and number of fans used in the design).

I don't need a filter just wanted to thank you for the testing.