The Exchange joked earlier this week that Christmas had come early Social hub Reddit filed to go public, TechCrunch reports. You know what that means: It’s time to ask questions. T...Brid is another HomeKit air purifier. See my previous posts for an in depth review. It works to some degree with HomeAssistant using the homekit component however I was able to write a custom component to unlock more advanced control. I’d highly suggest you look at wire cutters air purifier video on YouTube.The only downside is have the power levels don't allow fine adjustments. The lowest Level is very quiet with 30m^3/h, like the sleep mode from my Winix Zero/5200. But 2nd Ikea level is already 90m^3/h, which is many …Are you looking for an effective way to boost traffic to your website? Look no further than Reddit.com. With millions of active users and countless communities, Reddit offers a uni...Blue Air Purifier Link. 1. Accomplished_Set_965. •. For me levoit is the best. xenawpx. •. I really love my hathaspace - in my bedroom it made a huge difference in morning asthma and sinus allergies. true.To remove the odor of a dead animal, treat the area with an odor neutralizing product and use carbon filters or other air purifying products in the area. It is necessary to identif...cajunjoel. •. They are worth it, but you can also build a C-R box for $60-65 and you have an air purifier that is on par or better than any "official" purifier. You can even get a box fan and a 20x20x4 inch MERV 13 filter taped to the intake side. Remember, an air purifier is nothing more than a fan and a filter.This section covers the most popular and efficient air purifiers of the year, as recommended by Reddit. 01. LEVOIT Air Purifiers for Home Large Room. 02. AROEVE Air Purifiers for Home. 03. Coway Airmega AP-1512HH True HEPA Air …The only downside is have the power levels don't allow fine adjustments. The lowest Level is very quiet with 30m^3/h, like the sleep mode from my Winix Zero/5200. But 2nd Ikea level is already 90m^3/h, which is many …Filter costs can be $30-$100+ a piece depending on model. And the filters should be changed every 3 months - 6 months. Again, absolutely worth investing in one if you're looking to improve the air quality in your home. But you'll still want to dust/clean frequently to keep from going through upwards of $400 worth of filters a year.A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).Thoughts on Levoit Core 600s. I’ve been researching getting an air purifier for my main living area. The living/kitchen area is about 620 sqft and opens up into 2 different hallway areas and also open to the basement staircase. My research says to avoid ionizers and to get one with a carbon pellet filter. This one seems to fit the bill for ... Winix 5300-2 Air Purifier with True HEPA, PlasmaWave and Odor Reducing Carbon Filter. so better off investing in a floor shampoo'er. Hey, I have the Winix WAC9500, and it works quite well getting rid of pet hair in my apartment. Check out this air purifier review for a few more great options. With the increasing concerns about water quality and safety, investing in a water purifier for your home has become essential. However, with so many options available on the market... Thoughts on Levoit Core 600s. I’ve been researching getting an air purifier for my main living area. The living/kitchen area is about 620 sqft and opens up into 2 different hallway areas and also open to the basement staircase. My research says to avoid ionizers and to get one with a carbon pellet filter. This one seems to fit the bill for ... Buying Guide. Air Purifier Buying Guide. By Tanya A. Christian, Perry Santanachote. Updated April 3, 2023. Clean air is a vital part of everyday life. It affects our …The only time I've seen it suggested to get an air filter is when working with ABS and an enclosure. And then you get the air filter so that you can recirculate the air in the air enclosure. This is the only context I heard about using an air filter. At minimum, try to vent your printer when printing with ABS (in an enclosure) out a window.Jan 8, 2024 ... What is your budget, look at Coway Airmega 240 l Coway Airmega 300, or Airmega 1512 are some of the best for the money, reliable company, filter ...A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).The air purifier market is a bit sketchy. A lot of makers leave you with the impression they are HEPA, but don’t come out and say it definitively. I love Dyson products, and the fan on these units work great and they do clean the air. BUT, they are not HEPA. I have read it is due to the “air multiplier”:design and that not 100% of the air ... Elegoo air purifier doesn't convince me 100%. What about using a Xiaomi Air Purifier H3 or a cheaper and simpler Ikea FÖRNUFTIG with the specific for gas cleaning? On the first one I have not found many info related to resin 3d printing, on the second none at all. Oct 8, 2023 ... I've just recommended Levoit haha. True it's slightly more expensive, air coverage, quality and performance is so much better than Sterra And ...Are you looking for an effective way to boost traffic to your website? Look no further than Reddit.com. With millions of active users and countless communities, Reddit offers a uni...Dyson Purifier Hot+Cool Formaldehyde HP09: Covers up to 790 square feet, combines air purification with heating and cooling, and boasts smart features and excellent filtration. Filtration Technology: HEPA filters are essential for capturing most airborne particles, including allergens, dust, and mold spores.Bill Nye the "Science Guy" got torn to pieces for his answer on Reddit. So we did his homework for him. Apparently, this is a question people ask, and they don’t like it when you m...Jul 2, 2022 ... It fit well at the bottom of a large carry-on sized travel bag with room for 3-5 days of clothes on top. The filter is spec'd at 99.5% FE so ...Jan 8, 2024 ... What is your budget, look at Coway Airmega 240 l Coway Airmega 300, or Airmega 1512 are some of the best for the money, reliable company, filter ...Winix 5300-2 Air Purifier with True HEPA, PlasmaWave and Odor Reducing Carbon Filter. so better off investing in a floor shampoo'er. Hey, I have the Winix WAC9500, and it works quite well getting rid of pet hair in my apartment. Check out this air purifier review for a few more great options.The dehumidifier works like a charm for year around allergies (dust mites mostly) and the air filter works for seasonal allergies. I desperately need one of these but they are so expensive. You can DIY an air purifier using a box fan and standard furnace filters from your hardware store for like $30.Jul 2, 2022 ... It fit well at the bottom of a large carry-on sized travel bag with room for 3-5 days of clothes on top. The filter is spec'd at 99.5% FE so ...Air Doctor is a popular air purifier brand that offers high-quality air filtration systems for homes and businesses. If you’re looking to purchase an Air Doctor air purifier, you m...Now place the filters on either north/south or East/west. The bottom of the two filters are on each side of the fan and the tops of the filter meet at the eyeball touching each other. We’re almost done. Now you take cardboard and close off anything that isn’t a fan or filter. Enjoy the happy fan motor and clean air.Buying Guide. Air Purifier Buying Guide. By Tanya A. Christian, Perry Santanachote. Updated April 3, 2023. Clean air is a vital part of everyday life. It affects our …A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ). Evaporative humidifiers are the best. The filter pulls the water up and a fan circulates it. Other humidifiers should only be used with distilled or purified water or all the minerals in your water will be sent up into the air as well. Before we did a whole house humidifier we did vornados in each room. A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).In comparison the new Blueair Dust Magnet 5410i is only rated to a max of 356 sq.ft. and costs nearly $400. Even on sale it's still $200. It's a good machine, but for the money winix is too much of a good value. Blue air's cheaper machines are the same way, they start at $120, but only 161sq.ft.If the air in your home is clean, chances are you and your family will be healthier. Germs, microbes, and dust can make your home’s air dirty and cause your family to become sick. ...Just doing the math, the 600s is better than the 400s, giving 1.4 CFM per $, like the Core 300. 400s is 1.14 CFM/$, at least at standard prices. I have not priced in replacement filters. According to their Amazon pages, the 600s barely weighs more than the 400s too, though it's somewhat bigger in volume. Of course, for the price of one 600s ...The best HEPA air purifiers will use H12 HEPA filters. However, H13 is even better than standard HEPA filters. Precisely, the H13 filter captures particles that are more than 3x smaller than classic HEPA filters. H13 HEPA filters are so thorough they are used in clinics, hospitals, and dental offices.Advertising on Reddit can be a great way to reach a large, engaged audience. With millions of active users and page views per month, Reddit is one of the more popular websites for ...Bill Nye the "Science Guy" got torn to pieces for his answer on Reddit. So we did his homework for him. Apparently, this is a question people ask, and they don’t like it when you m...A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).Clips on to a box fan and can be rinsed out. $5-20 at home depot, Lowe's, Amazon, ebay. Just as effective as the more expensive air purifier for dust & dirt you can see. Add a couple of salt lamps to reduce static in the worst rooms …It's quiet (on low) and like amietron said, the replacement filters are a bit high. I did a fair amount of research on this before purchasing a Blueair 501 for the bedroom. This was years ago, so now it’s the 503, essentially the same; $399 free shipping on eBay. Aftermarket Filters $41 on Amazon are as good as OEM.Jan 26, 2024 · The Rabbit Air A3 is the best air purifier for pets because it’s highly customizable, with a specific filter for pet allergies. It's also very effective—in our test environment with smoke, dust, dirt, and artificial pet hair, the air purifier reduced PM 2.5 levels by 90% in 30 minutes on its lowest setting. Aug 21, 2023 ... I would recommend Winix just because Costco sells the replacement filters and the filters go on sale some what frequently, saving money on ...Find out which air purifiers are worth buying based on lab tests, effectiveness, noise levels, features, and more. Compare 11 models from brands like Levoit, Honeywell, …Just make sure you get a HEPA fan and either clean the filter or replace them regularly. veryproblemadic • 3 yr. ago. yes! My allergies pretty just disappeared after I got IQ Air. SustainableStarfish • 3 yr. ago. Just bought a purifier with a Hepa filter to help with my severe hayfever symptoms.I use this Germ Guardian air purifier in my bird room. They also offer it in a slightly larger size if you are looking to use it in a very large room (or with some really dusty birds!). It is a true HEPA filter with a carbon pre-filter to reduce odor and a UV light to kill viruses/bacteria. I usually run it 24/7 and change the filter ever 4-6 ...The flimsy carbon sheets included with most HEPA purifiers are totally Ineffective. This can be confirmed not only with the nose but a Proper meter. Ive measured reductions of 70% in minutes. Also a lot of VOCs will not have an odor so there can still be a problem without realizing it. Beware of claims of Bipolar ion and PCO To reduce VOCs.Here are the top 5 air purifiers recommended by Reddit users: Winix 5500-2500CA Air Purifier. The Winix 5500-2500CA Air Purifier is a great option for people who are looking for an air purifier that is effective and affordable. It has a True HEPA filter that can remove 99.97% of airborne pollutants, including dust, pollen, pet dander, and smoke.I currently own a renpho RP-001S air purifier for my bedroom. I love it because it has both a carbon mesh and a carbon pellet filter…. Now this unit has an optical dust sensor for auto mode. It doesn't provide a PM2.5 reading but instead a good, moderate and bad air quality. With this unit when I shake a blanket out in my room the AQI changes ...Evaporative humidifiers are the best. The filter pulls the water up and a fan circulates it. Other humidifiers should only be used with distilled or purified water or all the minerals in your water will be sent up into the air as well. Before we did a whole house humidifier we did vornados in each room.A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).I've just bought this air purifier, and unfortunately realized it uses some sort of electrostatic technology. The amazon.ca page made no mention of this, otherwise I would have avoided it due to ozone concerns. Coway AP-1512HH vs. Levoit Core 400S. I want to buy my first air purifier for a 40m² room at home. I am trying to decide between the Coway AP-1512HH and Levoit Core 400S. As far as specs go, I read that the Levoit has an edge there. Also I like that the Levoit has Smart Home Capabilities and can be controlled with Google Assistant. The shark air purifier 4 outperforms the Levoit core 600 by a pretty wide margin. With the 6 fan version outperforming by a mile. It seems that a lot in the industry are shocked by this, but the shark air purifier is amazing. Doing better than purifiers 2-3x it’s size and cost.A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).Some air purification terms to be aware of. HEPA: This air filtration standard ensures that your air purifier will remove 99.97% of pollutants of size 0.3 micrometers. This covers 100% of particles present in wildfire smoke. ACH: Air Changes per hour. This is a metric for the volume of air moved by the air purifier.A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).Clorox bleach can be safely used to purify water in the event of an emergency. Clorox recommends adding 2 drops of bleach to 1 quart of water or 8 drops of bleach to 1 gallon of wa...8 Best Air Purifiers of 2024, Tested & Reviewed by Experts. Appliances. Air Purifiers. The Best Air Purifiers to Remove Dust and Allergens, According to Experts. With their enhanced...A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).I think once you start looking for large air purifiers with physical controls, you end up with something like the Enviroklenz, but that costs over $600. I really do think that your best bet is to get a box fan (the Amazon basics one is good because it has the corners filled in) and attach a 2-4 inch thick furnace filter.Best overall. Best value large room. Best smart features. Most energy efficient. Best high tech. Best value small spaces. How we test. Frequently asked questions. How to choose …The air purifier market is a bit sketchy. A lot of makers leave you with the impression they are HEPA, but don’t come out and say it definitively. I love Dyson products, and the fan on these units work great and they do clean the air. BUT, they are not HEPA. I have read it is due to the “air multiplier”:design and that not 100% of the air ...Thoughts on Levoit Core 600s. I’ve been researching getting an air purifier for my main living area. The living/kitchen area is about 620 sqft and opens up into 2 different hallway areas and also open to the basement staircase. My research says to avoid ionizers and to get one with a carbon pellet filter. This one seems to fit the bill for ...Megan Anderson. Atlanta Hawks. Los Angeles Lakers. Boston Celtics. Philadelphia 76ers. AstraZeneca. Reply More repliesMore replies reply reply More repliesMore repliesMore replies. 683 votes, 98 comments. 12M subscribers in the lifehacks community. Lifehacks: Uncommon solutions to common problems.A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the … This comes out to a volume of 10 feet x 10 feet x 10 feet = 1000 feet cubed (ft3). If you want 4 air changes per hour (ACH), then the air purifier (s) must be able to push 1000 ft3 of air through the filter 4 times in one hour (hr). That means that it should be able to push 4000 ft3 (4 times 1000 ft3) of air per hour. Winix HR900. Coway Airmega 250S. Levoit Core 600s. Blueair Classic 600 (this handles all ionization/filtering ionized air in-unit, so I don't have to worry about ionized air sticking to surfaces which I am getting in the 211 I own currently) My budget is roughly $500 max. I welcome your opinions! Sort by: paulrudder. • 2 yr. ago. Here are the top 5 air purifiers recommended by Reddit users: Winix 5500-2500CA Air Purifier. The Winix 5500-2500CA Air Purifier is a great option for people who are looking for an air purifier that is effective and affordable. It has a True HEPA filter that can remove 99.97% of airborne pollutants, including dust, pollen, pet dander, and smoke. A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).If your bedroom is 100 square ft with 8 ft ceilings, the volume of air in that room is 800 cubic ft. The levoit vital 200s (which I own) can move 245 cfm of air. Which means it can purify the air in that room multiple times per hour. Some purifiers are rated for bigger rooms. An oversized purifier will just purify the air more times per hour. A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ). And this is why dB ratings don't paint a complete picture: the Taotronics is more white-noise-ey while the Winix is louder in some bands (low frequencies, mostly) and produces a more irregular sound. The TT-AP003 has a dust sensor, while the U300 has a TVOC sensor (called fart detector by one of my friends). Since I mainly use air purifiers for ... Gonna just buy a vacuum I guess. SuperSilverSurfer42. •. I just started getting this horrible smell from my 3 year old Levoit Core 300 Air Purifier. I put a Genuine Levoit replacement filter in it and I was still getting the smell. The filter was ~ 2.5 years old but was still sealed in it's original box + bag so it should have been just fine. found these on amazon... the vivosun package is $70. the medify car air purifier is $85. = $155 VIVOSUN Air Filtration Kit: 4 Inch 203 CFM Inline Fan with Speed Controller, 4'' Carbon Filter and 8 Feet of Ducting Combo Medify MA-CAR Air Purifier with H13 HEPA Filter - a Higher Grade of HEPA | Car Purifier also found this nytimes article on hepa ...Reddit is a popular social media platform that boasts millions of active users. With its vast user base and diverse communities, it presents a unique opportunity for businesses to ...Wirecutter performed testing on an Austin machine and results indicated CADR levels below under $200 Coways and Winix. Their Carbon,on the other hand, is effective, their HEPA not so much. Particulate filtering is increased at higher CFM rates. Carbon voc capture is effective at lower CFM rates.They're not if you have allergens in your air that are triggering your asthma. bsdguides. • 7 yr. ago. Personally i can only recommend them. HEPA filters will filter out irritants/pollutants from air by a very substantial amount. Less irritants, less Asthma. At …The Blueair purifier produce dangerous or concerning levels of ozone. Not only have Blueair products passed California's 50 ppb ozone limit, many have passed a newer much more restrictive "Zero Ozone" standard. In 2021, Blueair’s Blue Pure Auto, DustMagnet, HealthProtect, and Pure Fan Auto models also received Zero Ozone Verification, one of ...A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ).Air purifiers typically have three layers of filtration media: a pre-filter for large debris such as dust and hair, an activated carbon filter for odors and VOCs, and a particle filter (usually HEPA ) for very small particles. They're meant to be run 24/7, usually with one unit covering a single room. See moreBill Nye the "Science Guy" got torn to pieces for his answer on Reddit. So we did his homework for him. Apparently, this is a question people ask, and they don’t like it when you m...
The above steps, alone, might improve your home air quality enough that a standalone air purifier turns out to be unnecessary. Visualizing the results. You can use the CDC's interactive home ventilation tool to see how well various combinations of furnace/AC filters, open windows, and portable air purifiers will remove viruses from your home. Note. How do you fax
Los Angeles Lakers. Philadelphia 76ers. Share Add a Comment. reply reply Reply Reply reply reply Reply more repliesMore replies more replies reply more replyMore replies reply More replies. 1.2K votes, 140 comments. 23M subscribers in the mildlyinteresting community. Aww, cripes. I didn't know I'd have to write a description. How many….In very simple terms: Air purifiers = filters pollutants out from the air incl pollen, dust, smoke, some aerosols etc. The higher the level/tech usually means the more stuff it can filter out ... for a higher price obviously. Air humidifiers = add moisture into the air to prevent dryness that can cause irritation in many parts of the body.Filter costs can be $30-$100+ a piece depending on model. And the filters should be changed every 3 months - 6 months. Again, absolutely worth investing in one if you're looking to improve the air quality in your home. But you'll still want to dust/clean frequently to keep from going through upwards of $400 worth of filters a year.And this is why dB ratings don't paint a complete picture: the Taotronics is more white-noise-ey while the Winix is louder in some bands (low frequencies, mostly) and produces a more irregular sound. The TT-AP003 has a dust sensor, while the U300 has a TVOC sensor (called fart detector by one of my friends). Since I mainly use air purifiers for ...Austin air has a good reputation and very robust, long-lasting filters. They also have fully metal housings that are air tight. Not plastic or styrofoam poor quality housings. I know they’re not on your list, but if you haven’t already considered them, you should. I love my Filtrete smart air purifier.Los Angeles Lakers. Philadelphia 76ers. Share Add a Comment. reply reply Reply Reply reply reply Reply more repliesMore replies more replies reply more replyMore replies reply More replies. 1.2K votes, 140 comments. 23M subscribers in the mildlyinteresting community. Aww, cripes. I didn't know I'd have to write a description. How many…. In theory, you could use a large (25" square) x long (6' or greater) section of return duct w/ multiple bulbs and you might get results with the blower running at lower speeds. ie: my Carrier 58TN1 moves ~ 450-500 CFM at the lowest speed. With a 6' section of 25x25" duct.. 450 cfm = 103.68 FPM or 1.728 feet per second. A subreddit for discussing all things related to air purifiers. Promotions, spam, and other marketing are strictly prohibited to maintain the quality of information. Please ensure that the information you share is based on reasonable facts as it directly impacts the health of others who are trying to control their indoor air quality (IAQ). If your bedroom is 100 square ft with 8 ft ceilings, the volume of air in that room is 800 cubic ft. The levoit vital 200s (which I own) can move 245 cfm of air. Which means it can purify the air in that room multiple times per hour. Some purifiers are rated for bigger rooms. An oversized purifier will just purify the air more times per hour.Thoughts on Levoit Core 600s. I’ve been researching getting an air purifier for my main living area. The living/kitchen area is about 620 sqft and opens up into 2 different hallway areas and also open to the basement staircase. My research says to avoid ionizers and to get one with a carbon pellet filter. This one seems to fit the bill for ...Thinking of getting a Mila. Would also love your thoughts on that purifier. The Blueair 211+ auto is officially Verified Zero Ozone by Intertek with emittance of ozone not exceeding a concentration of 0.005 ppm. Thus, no need to worry about any Air Purifiers with ionizers, as long as it has been tested and Verified Zero Ozone. Build a do-it-yourself air purifier for about $25 [3:40] Dr. Jeffrey E. Terrell, director of the Michigan Sinus Center, demonstrates how to build an air purifier with a HEPA filter for about $25 with parts from your local hardware store. Michigan ^Medicine in Science & Technology. 629,602 views since Jun ^2011. bot ^info I have the Levoit Core 300, Levoit LV-H132, and Austin Air Healthmate. I use a couple laser-based sensors to track the PM2.5 and all three of these purifiers are effective. Core 300 is totally worth the extra $10 for the quieter operation. As for Core 300 vs something larger, I think it comes down to how big the space is that you're trying to ...found these on amazon... the vivosun package is $70. the medify car air purifier is $85. = $155 VIVOSUN Air Filtration Kit: 4 Inch 203 CFM Inline Fan with Speed Controller, 4'' Carbon Filter and 8 Feet of Ducting Combo Medify MA-CAR Air Purifier with H13 HEPA Filter - a Higher Grade of HEPA | Car Purifier also found this nytimes article on hepa ....