As we mentioned above, some people just tape the filter right to the back of the box fan and call it a day. Once I have all the frames attached, I then attach the bottom of the box. Make this DIY air filter to (possibly) reduce your indoor exposure to coronavirus ... president of Hive76, and Inquirer writer Tom Avril demonstrate how to build an air filtering system out of a box fan and some furnace filters on Oct. 14, 2020. Nest Hello vs. Ring Video Doorbell Pro: Which is better for you? It doesn’t take that much more work, and with greater airflow through two filters, the DIY purifier is much more effective. Now you are almost done. It is essentially just a wooden box with a blower motor sucking dirty air through a set of filters and blowing out fresh clean air. Duct tape: It’s pretty easy to find duct tape online or in the store. Share it with us! Please view all of the detailed photos, download the FREE PLANS, and watch the VIDEO for reference. A single strip of duct tape around the edges should be fine, but you don’t want any gaps or cracks to impact efficiency. Now that you have all of your pieces cut, it is time to cut out the the circle for the blower fan, cut out the bottom section, and cut out the square for front air register. A reliable box fan: If you don’t already have a box fan, you can find affordable options for around $20 to $40, like this Comfort Zone model. Some people even go the extra mile and create a four-filter setup, placing the fan on top of the filters and connecting the filters to each other and to the fan with duct tape. All you need to do is attach the filter to the back of the fan with the arrows pointing toward the back of the fan. Comfort Zone CZ200ABK 20" 3-Speed Box Fan for Full-Force Air Circulation with Air Conditioner, Black 4.4 out of 5 stars 1,362 FilterBuy 20x20x1, Pleated HVAC AC Furnace Air Filter… Wide painters tape or duct tape; 20”x 20” Box Fan (with controls on the top, front or side) I used to blow a fan directly at myself, but it sucked in dust from around the shop and blew it at me. If you’re going to buy the HEPA filter linked above, you’ll need to shop around for a smaller box fan. That’s why, if you don’t mind a couple of extra steps, we advise the two-filter setup. Let’s dive in to show exactly how it’s done. The construction of the box is very simple, I used glue and brad nails to attach the pieces together. #5 Admire your new DIY air purifier Total cost for this DIY air filter: 166 RMB (US$27). The air filter panels are Merv 13 rated and … A pack of home HVAC filters, also 20 inches: You can find these at any department store or order them online. The other he gave to me to use later. It is essentially just a wooden box with a blower motor sucking dirty air through a set of filters and blowing out fresh clean air. I used a hand held circular saw to cross cut the pieces to rough size, then finished them off on the table saw. Securely fasten a MERV 13 filter to the air intake side of the fan. Matthais mounted his air cleaner(s) in the corner of his shop which I think is a lot less effective. Hey there, thanks for reading my Instructable and for your comment! I use 20X20 box fans. I’m not sure when I’ll get around to making one for my shop but now I know I have a motor for it. Reply 3 years ago. Over time, these filters will get quite dirty and clogged with dust. Saw Dust Filter Fan. He built a frame around the blower from plywood and 2 x 4s, and attached a switch to control the fan. About: I am a Building Automation Engineer at a major University in California. Photo 2: Filter box with removable side sitting next to it Photo 3: Filter box with a filter and fan inside Photo 4: Different view of filter box with filter and fan inside. DIY Air Filter One easy and affordable way to make your own air cleaner at home is with a box fan and a furnace filter. Set your purifier on the side of the cardboard, and cut or trace around it to create a cardboard triangle that can comfortably fit the air purifier’s gap. While there are impressive air purifiers you can buy with plenty of smart tech, they can be expensive, and you may not want to drop several hundred dollars on a new appliance. If you have gaps or leaks in your box air and dust will get sucked in and re-circulate back into your space. I measure and mark the locations of the filter frames and attach the strips with wood glue and brad nails. Thank you so much if you made it this far. There are only a few steps left. My favorite people in the world are my wife Bouavon, and my two beautiful sons Blaise and Dhylon. Room air gets sucked into the filter first, and the fan blows clean air out. Want to breathe cleaner air in your home? I am extremely creative and I am alway…, How to Make Charcuterie Boards Using Clear Acrylic Templates. Fortunately, there is a homemade, do-it-yourself (DIY) alternative to consider — one that’s both affordable and effective. We suggest you get at least a four-pack for this project. That would be a bit of an exaggeration though because 1. After building my new shop I soon realized that it was really hard to breathe with all the dust I was making. I leave it on sometimes over night and I come back in to my shop the next day to a fresh clean air shop. I’m not talking about venting – that’s still something else I will do – but rather gett… Repurposing a Box Fan Purchase a fan you can fit with a filter. Digital Trends may earn a commission when you buy through links on our site. If you have any questions at all please leave a comment. I have built a few, as simple as a 20x20 filter attached to a box fan, works pretty well in a smal area, for dad's body shop we build a 6 ft square box 12" thick, it is on casters. I think that with my setup and with clogged filters it recirculates more like 200 cfm. All you need is a box fan and some traditional, replaceable HVAC filters. Now, you are ready to set up your air purifier in a central location in your home. Let’s talk more about your air purifier design. With all that said, my shop is 12' x 16' x about 8' tall (almost 1600 cubic ft) /200 cfm it should take more like 10 minutes to clean the air. These filters sell for about $15 at your local hardware store. Extra features like activated carbon are nice, but not necessary. The filters sell for about $15. If they start looking dirty, it’s probably time to quickly disassemble and replace them with new versions to keep the purifier working optimally. ... Best compact DIY Box Fan Filtration System ... (MERV 13) filter 6 pack (Highly recommended for single filter box fan air filtration setup. Glue-ups, finishing, welding, general repairs, etcetera, etcetera, they all occur in the same space. Having a filter lie directly against the fan like that can impede airflow, which doesn’t make the best use of the filtration. Hope this helps! What was the cost of all components in a rough estimation? In 2018, I tested a popular claim: that sticking a furnace/HVAC filter on a standard box fan produces a useful DIY air purifier. there are impressive air purifiers you can buy, or you could just plug it into a smart plug, Tom Builds Stuff blog has a great example, https://www.reddit.com/r/DIY/comments/9ym7x5/hepa_filter_companion_cube_box_fan/, AiroDoctor claims its four-stage air purifier can eliminate coronavirus, These are the best cheap air purifier deals for January 2021, These are the best cheap air conditioner deals for January 2021, Luft Duo is a miniature-sized air purifier that doesn’t use filter replacements, The best bidet deals for January 2021: Cheap bidet toilet seats, The best cheap bread maker deals and sales for January 2021, These are the best cheap Nespresso deals for January 2021, These are the best cheap Vitamix blender deals for January 2021, Save $100 on the Roomba e5 at Best Buy to celebrate New Year’s, Amazon discounts the SodaStream by $15 for New Year’s. These can be hard to find quickly with the conditions, however. The project itself is a homemade shop air filter. At this point you should also install your blower fan and make sure that you seal that as well. As you can see, you place the other 20-inch sides of the two filters to either the side or the back of the fan and tape them in place. Attach filters to the fan. Remember to choose the right size. Build a box, cut a big hole in the bottom and install an exhaust fan in it (Photo 2). Looks like something that would help alot! However, with the triangle purifier setup, you have to cover up those additional gaps, so the fan is actually sucking air through the filters themselves. Compare that to 8,000 RMB ($1,300) for the fancy purifiers here in Beijing. DIY-ers will sometimes construct their own HEPA filters by simply attaching an air filter to the front of a box fan, but Dr. Corsi says that might not be as effective as it seems. This is what I came up with. This will probably perform even better than the filters used during testing) I made the spot for the 5” filter so that one day I can put a 20”x20”x5” MERV 16 filter … This is where your cardboard comes in. After coughing up a lung I decided to hurry up and make a DIY Shop Air Cleaner before my lungs get caked with sawdust. If you would like a FREE copy of the SketchUp drawings for this project you can download them from my website by clicking HERE. 20 inch Box Fan; 20 by 20 by 1 MERV 13 Furnace Filter; Heavy Duty Tape; Directions: There will be a little arrow on the filter showing which way the air should flow. My workshop doesn’t have air conditioning, and it gets pretty hot while I’m working. I have one in the window and every couple months, I have to pull it down and clean the fan and the screen that is on the window. The blower motor that I used states that it provides 420 cfm of air flow so in a perfect world at that rate it should be able to clean all the air in my shop in less than 5 minutes. I painted a short length at a time keeping the fan close. Now it is time to assemble the wooden box. Three stage, double box fan air filter On of the things I wanted to do was provide a way to filter the air in the microshop. If you want to do it this way, just make sure the filter arrows are facing toward the back of the fan. I mounted mine pretty centrally and near my biggest sawdust maker (my miter saw) and I run it continuously while working. Now that most of the box is assembled it is very important to make sure that the intake portion of the box is air tight. It is vital that all air being blown out of the discharge of your air cleaner passes through the filters first. Purchase a standard 20″ Box Fan. This would be a good projec… This is what I came up with. Matthias Wandel built something similar (larger) a while back, but his shop is much larger than mine so I'm not sure yet how much power I'll need. That’s fine — air will enter through the filter on the back of the fan and then exit through the front of the fan. Ideally, find a fan that is the same … A cardboard box and scissors/box cutters: The box should also have sides that are at least 20 inches high and wide, but otherwise, any spare box should do. Once I found sawdust is a carcinogen (yes, really) I always wear a mask while working, but filtration still makes a lot of sense. Using a separate fan to recirculate air around the shop did not affect the air filtration system efficiency at all. An easy and inexpensive way to make your own air cleaner is to attach a very high-efficiency furnace filter to a basic box fan. You can use any tool you have available that can cut through wood but I used my trusty Black and Decker Matrix with the jig saw attachment. MERV vs. HEPA filters HEPA filters are the gold standard of air filters. To make one, start by buying a MERV 13 or FPR 10 furnace filter and tape it to the back of a box fan. Examine the filter’s Minimum Efficiency Reporting Value (MERV) rating, which is a number up to 20 that indicates the size of particles the filter is rated to capture. With allergens, disease, odors, and dust building up over the winter months, there are many great reasons to consider getting an air purifier for your home to improve indoor air quality. Design 1: Use one filter for a … Did you make this project? Supplies. https://www.homedepot.com/p/AC-Safe-20-in-Box-Fan-Filter-FF-20/307280271 (Note: Some have wondered whether we should tape it onto the back of the box fan filter. : History: First off, a little history of how this project got started. I notice that after about 10 to15 minutes the air is dust free. I am very glad that I took the few hours it took me to build this project. I like this method because it allows me to break down the pieces to a more manageable size before ripping them to final dimensions on the table saw. I had a few extra furnace filters lying around, so I tried attaching one to the back of the fan using hook-and-loop fasteners. Your total cost for a DIY box fan filter can be as low as $40 – 50.00 (including incidentals like duct tape), or higher depending on the filter options. If you order a fan or filters online, the box they come in should work just fine! Copyright ©2021 Designtechnica Corporation. How long does this take to clean your shop air after a sawing session? I hope to keep at least two 1” filters in it most times. Reference the plans and the video above for details on how I do this and hopefully it helps you figure out how to assemble yours. Now the fan will have to draw air through the filters as it runs. I have had mine running for a few weeks now and I have to say that having an Air Cleaner makes a huge difference in the air quality in my shop. With a two-filter or four-filter setup, the filters may last a bit longer, but you should still keep an eye on them. Thanks! As per the cut list in my FREE PLANS, I cut plywood strips 1" wide and use them to create a frame to house the filters. I hung mine on the ceiling right above my miter saw because that is where the most sawdust is generated in my shop. This step is unnecessary if you’re going with the one-filter design, as you can simply attach one 20-by-20-inch filter to the back of a 20-inch box fan. Apply gasketing to the edges of the air intake part of the fan. Mine cost $20 at a local home improvement store. Any type of sealant will work for this but you must not skip this step. Not much left to do except popping in the two filters and installing the air cleaner somewhere in your shop. Now, use your duct tape to tape a 20-inch side of the two filters together to form an angle. Then cover the hole with a couple of disposable furnace filters and cut slots in the bottom of the box to vent the filtered air back into the room (Photo 1). Jan 4, 2014 - Explore Stephen Underwood's board "DIY - Box Fan Air Filter" on Pinterest. Once the filters get caked with sawdust, they restrict the air flow quite a bit. Let’s talk more about your air purifier design. Make sure it’s around 20 inches high, a common standard for box fans. The 'hack' is easy: Experts recommend buying what’s called a MERV 13 or FPR 10 furnace filter and tape it to the back of a box fan. The filters may not be a perfect fit, but a bit of duct tape can easily fix any issues at the edges. If you like this project PLEASE consider following my Instructable profile. The filters that I used for this air cleaner measure 16"x20"x1" so I designed my air cleaner to accommodate this size filter. A typical HVAC filter is designed to be replaced every several months or so. A model with a timer is nice, but not required (or you could just plug it into a smart plug). I think our spaces are similar, ,though I'm just in a one-car garage. See more ideas about box fan, wood shop, diy box. Shawn was able to score a couple old furnace blower motors for free and the smaller of the two was to be the fan for his shop filter. The fan/filter captured the spray paint \'drift\' perfectly (although I still had to wear a respirator and thoroughly air out the apartments). Insert the air register into the 8"x8" opening and use the 2 screws that are provided with the register. Place your two filters together, with the arrows pointing at each other. Railroad Rail Lantern / Sign Stand Split With Axe. Insofar as filter changing costs, you will find that it is still much cheaper to buy furnace filters and variants of them without sacrificing on quality or air cleaning capacity. The 9 things Amazon Echo can do that Google Home can’t, These are the best deals on Ring Video Doorbells for January 2021, These are the best cheap blender deals for January 2021. Use this triangle to create a mirrored cardboard piece for the other side as well. Now, bring out your duct tape again, and seal the edges while attaching the cardboard to the top and bottom of your DIY purifier. I don't think that it actually does provide 420 cfm (more like 300 cfm) and 2. The Tom Builds Stuff blog has a great example that shows just how this works. Point that in the right direction, and then tape onto the front of the box fan filter. Not only would it clean the air, but it would also help to keep the shop itself cleaner, by catching the dust before it settles. Or better yet, make yourself a fancier DIY air purifier by finding a fan without a metal bar in the front, like the DIY air purifier I ship through Smart Air. These “filter fans” can filter out the small particles that … PollenTec Box Fan MERV 10 Nano Air Filters Pollen, Dust, Mold Spores and Pet Dander – Biodegradable, Electrostatic Design 6 Pack - Compatible with Holmes HBF2010A-WM Box Fans 20.5" Frame 3.4 out of 5 … Air filters like these will have arrows on the sides that show which way air is supposed to flow through the filter. 20x20 Fan With Air Filter. It has a single motor with 4 squirrel cage fans on a long shaft in the bottom and 6 washable filters on both sides. But a quick solution, as posted by the University of Michigan’s Medical Center, is to create your own filter using a box fan and a standard HEPA filter, both readily available in most hardware stores and costing about $25 for everything. Several years ago I built a basic air filter using an old recycled furnace fan, which I wrote about in this post.The original air cleaner was ugly, awkward to install via hanging chains, had a switch location which made it hard for my vertically-challenged wife to turn on, and was unsafe due to the exposed blower fan squirrel cage. However, the most effective DIY home air purifier uses two filters at once for better airflow, and it’s not that complicated to set up. The addition of a charcoal filter can also help to reduce odors, like those that come from wildfire smoke. Matthias has some gadget for measuring airborne particulates, and I don't, so your numbers are very helpful. Assuming the shop air mixes perfectly, for a time constant of 10 minutes, the unit has to filter a volume equivalent to the workshop every 10 minutes. Give this inexpensive DIY air filter a try. This piece has a large square cut out that holds the filters in place but also allows full airflow through the filters. Upgrade your lifestyleDigital Trends helps readers keep tabs on the fast-paced world of tech with all the latest news, fun product reviews, insightful editorials, and one-of-a-kind sneak peeks.Digital Trends may earn a commission when you buy through links on our site. All rights reserved. The easiest way to make a low cost air cleaner is to just use a cheap box fan with a furnace air filter attached in some way to the inlet side. Attach the front piece with the 8"x8" square cut out of the center to the box using some more wood glue and brad nails. That’s “pull-through” instead of “blow-through,” the way residential AC works. If you would prefer to use this larger setup, then start by taking two of the filters you bought and unpackaging them. With my workshop about 400 square feet (or about 35 square meters), and about 6.5 feet (2 meters) high, I have a volume of 2600 cubic feet. After coughing up a lung I decided to hurry up and make a DIY Shop Air Cleaner before my lungs get caked with sawdust. Please see PLANS and VIDEO for reference. Using the free plans that you downloaded from my website ( Click HERE if you haven't ), cut out the 3/4″ plywood according to the cut list. A filter with at least a MERV 13 rating is ideal, as it is rated to capture some smaller particles (like some bacteria and viruses). You can skip this step if you want to make a simple one-filter air purifier. The way residential AC works that I took the few hours it took me use! He gave to me to use this larger setup, then start by taking two of the filter frames attach. By taking two of the box they come in should work just fine through filter... '' x8 '' opening and use the 2 screws that are provided with the arrows pointing each... 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