This is a nice vid although he makes some important mistakes: He says you need a 99.99% (0.3 micron) efficiency filter, this is ULPA not HEPA, it is a mistake to use ULPA filters because they clog much faster than HEPA, they require more powerful (and more expensive) fans, and the additional filtration level is totally unnecessary. The primary thing you are trying to filter out is competing spores like trichoderma, if you do the research you will see that all of the common contam spores are well over 1 micron in size. Also the old school traditional design is heavy, not portable, and expensive. He also states that you need huge filters to get laminar flow - this is not correct. If anyone is interested in a light weight, VERY inexpensive, portable design, see my vid "Build Your Own Laminar Flow Hood for less than $100 (really WORKS!)". Wishing you the best everyone.
Thank you for sharing your own video, because after I saw he chose a $200+ , fan for his hood, I immediately wanted to know how much everything cost him, considering I've seen laminar hoods start at $300... Seems like a LOT of extra work to not save much (if any) money which seems silly unless you need the customization. But my interest is saving money, so I'll be watching your video now! 😊
Hi Gordotek, big follower of you! I do have a question to your comment though: As far as i know the filter classifications are as follow (0.1-0.3 microns): H13: 99,95 %, True HEPA: 99,97 % H14: 99,995 % U15: 99,9995 % (ULPA) why not choose an H14 if you run a pre-filter, which would prevent clogging up the big H14 too fast? I know this build is definately more expensive, but i wanted a little bigger workspace and found a 24x24 Inch quite inexpensiveley over here in Germany.. of course the fan needs to be quite powerful (therefore more expensive) for my build but I guess that's what I am going with.. Would love to see a video of you if you by chance decided to build another model (maybe this time a reasonable-priced-high-end laminar flow hood.. Thanks for sharing your knowledge! Support @gordotek guys, really smart guy! Cheers
@@canercan2172 Hi there! I found some filters from htm-shop but had to contact them for the data sheets.. A suiting fan for that 610mm x 610mm filter + pre-filter I chose by looking through experience reports in forums.. I think it’s around 179€ though too (sold on eBay) - yet I unfortunately didn’t find the time for that build so far.. please keep me updated which route in building one you choose as I am always keen on exchanging experiences- I feel like the communities over here are not that big and sometimes lack of professionalism compared to the US based ones I have been following - but then there is the point that we just have other products available to work with 🤷🏻♂️
Hey Tony, I’ve been searching for a proper blower fan for my 24”x24” filter….but getting these fan curves from the manufacturers is near impossible and finding a proper blower fan that fits your pressure criteria is also near impossible. Edit: Reading the comments below, I think I found my answer, gonna put a dimmer on my powerful blower and gage the laminar flow of the air coming out of my filter using a flame test, the flame should not flicker. Also the dimmer allows to increase the power of your blower as the filter ages and gets clogged with more dust particles. Kudos for all the help.
Hey, this looks like a great idea, can you help me understand how to do this technique? im also building a 24 by 24 and using the TDU2 seems a little bit overkill, but maybe i can dimm it down like you are suggesting, did it work for you?
Tony, from freshcap. I loved the educational value of this video as I recently have an interest in things such as hvac, mycology, and welding. It was great the way you explained the pressure drop, filtration percentages, fan curbs, and filter size. Back in school diagram boards like the one you drew went over my head. Now that its years later I'm finding that things such as this aren't so difficult to grasp. So thank you sir, please do continue!
So glad you liked it! It was kind of confusing when I first learned it so I wanted to try and lay it out in an understandable way. Building a flow hood really changes the game for growing mushrooms, so it's definitely worth doing! Of course, you could always just buy one, but building your own is a little more fun ;)
I followed your method step by step and built me the exact same one. I am so happy with it, I wish I can post video or picture of it. thank you for all your help.
Hello, Great video. It seems that the Astrocel filters are gone. Saw them discontinued on most sites. Do you have a recommendation on another one to use?
One uneducated word of advice I have about fans is using either a squirrel cage fan OR my favorite type of fan is an inline blower fan. You can buy a fan that you know pushes more air than you need and you can just buy a variable speed knob that the fan plugs into and you can adjust the thrust of the fan by using the dial. I feel like thats much easier than doing a bunch of math and trying to get the EXACT fan and CFM you need.
Great video Tony and FreshCap. You certainly know your HEPA filters! Looks like you've used an image of a Smart Air HEPA filter at 02:32 when you're comparing thin vs. thick HEPAs. Awesome! Just to clarify - you're right many filters from Home Depot are lower grad (e.g. MERV7 or MERV9), but all our filters are HEPAs that get 99.9% of particles. But you're spot on - thicker HEPAs should be used when laminar flow is needed. More importantly, the HEPAs should have a honeycomb section to straighten out the flow once it's passed through the HEPA filter. You can see the aluminium (silver) honeycomb in the filter you bought at 03:48. That's vitally important. We're big advocates of DIY air purifiers (and laminar flow hoods!), thanks for using our filter in your description!
Thanks for clarifying! I guess the important distinction is the thickness and the honeycomb section to help with the laminar flow. If laminar flow isn't required, the thinner filters can work just as well for scrubbing the air.
Great video. I was planning on using a 24x24x5.8 filter. With a maximum filter flow capacity of 550 CFM, there are no affordable blower options capable of delivering this lower flow while at 1.3 inches of static pressure.The 24x24x11.5 filter would be compatible with the blower described in the video. Learning!
I watched these videos in the first place, you tell them very complicated, it is not that difficult. 1- The filter you choose should be Hepa H14 %99.99 and it should support laminar flow, 2- Find out the initial pressure and final pressure drop of the hepa filter. For example start 140pa - final pressure 450pa - maximum 600pa pa = pascal 3- How many m3 of air passes your hepa filter per hour, for example 300m3 4- When choosing a fan, you will look at the table and there are pressure pascal values, starting 140pa, but this will increase up to 450pa when the filter is used. 5- You choose the fan according to the final pressure drop, that is, you will choose the fan that reaches a value close to 300m3 at 450pa end pressure. 6- You will get 1 dimmer speed controller for the fan. With this speed controller, you will slow down the fan speed and use the air flow you need at the initial 140pa pressure. As the filter becomes clogged, you will increase the fan speed and have the air flow you need. My experiences: the air flow out of the filter is 300m3 / h, we will not release an air flow at this speed, when I turn on the fan, I reduce the fan speed and I watch a lighter or my gas stove burning stably in the laminar flow. I am not measuring how many m3 of passing air is per hour. I totally make an eye decision and a slight current is enough. I have done liquid culture, tissue transfer, agar to spore print, spore syringe, spore print and zero contamination! It definitely works, do not worry about how to do it, refer to the items I have described above. I have read a lot of articles and there is indeed a lot of confusion. Don't waste any time, the basic logic is like this. footnote: Maximum air flow to a hepa filter of 300m3 / h should not exceed 360m3 / h, laminator flow is disrupted, prefer slow operation instead of fast, while you are working, the medium is not circulating, if there is circulating, you can increase the amount of current.
@@blakebeaton8410 Our measurement units and your units are different, but if you do it with the logic I said, you probably won't have any problems, use an adjustable dimmer. With the help of a lighter or candle you can tell if the flow is laminar or not, you don't have to use them every time. Too much flow rather than less creates turbulence.
Im curious about what kind of rate of m³/h your h14 has since you took 300m³/h as an example and all h14s I can find are at 1400 m³/h. Is this apropriate for a h14? Im asking because that would determine how much the fan will cost and how much energy it needs. TIA
@@Omnipotent645 I just took the h14 filter and looked at the "pascal" value and bought a powerful fan to match the last projection "pascal" value when the filter was completely clogged. As the fan gets dirty, its pores are clogged, so the pressure value is constantly increasing. Since the fan I bought will normally be very powerful, I connected a dimmer to it, I make the dimmer setting completely blind. I see that the flame of my alcohol stove is laminar. The flame does not fluctuate. my h14 filter dimensions are 30cm x 60cm, if the dimensions of the h14 filter you are looking at are large, the m3 value will naturally be high. there is no problem with that. As for energy, I assume that you will not spend 8 hours a day at the beginning of this, the energy calculation is not very important, if you want to calculate how much electricity it consumes, you can calculate the power used by the fan. My h14 filter
Tony it would be very helpful if you answered the questions in your comments section because I have many of the same questions but you haven’t answered them previously so I won’t ask you again apart from that, great video
Hi Tony. Great video. When you plotted the pressure drop of your HEPA filter on the fan graph y-axis , were you actually plotting the resistance of your filter? I am wondering if you needed to solve for the pressure drop as a function of the given flow rate and resistance on your filter and plot that, but I am not sure. I think given the speeds you operate at 800cfm is similar to the tested 1000cfm it wouldn’t matter if this is true, but trying to wrap my head around the fluid mechanics. Cheers and thanks!
Thanks for your videos they're very helpful, i have a question can i use a hepa 14 pre filter 16x25x1 just to get better inoculation and that wouldn't force the blower, i bougth flanders filter 21.75" x 37.25" x 6.375 and 1tdu2 Blower, thanks a lot and waiting for your reply
Advice for anyone seriously considering this project: Don't waste your time (like me) looking for a less powerful fan to use on a smaller filter (24x24) in order to save some money. If it's true that most filter's have a resistance of 1.0 in.wg along with a prefilter of .3, then the ONLY squirrel cage blower that moves air at that resistance is the 1TDU2. The closest runner up is the TDT8. This of course also assumes the 100 FPS is the minimum requirement for laminar flow. I'm taking him at his word on that. Had someone told me this before, it would have saved me a couple of hours. You're welcome :)
@@BoomerShroomer Yep! I'm very happy with it, though I wish that it came with mounting flanges. I ended up using some L flanges I bought from the hardware store, but it worked great!
Hi, thanks for the amazing video Tony! Can anyone tell me if the material of the filter is important, apart from the efficiency rating? I bought an AstroPak filter, with a rating of 99,99% efficiency but not made out of metal (made out of paper / fabric like material). Does this matter? (sorry if this is a stupid question!)
Just a thing, thickness doesn't influence efficency rather it changes the maximum air flow. a thicker filter allows for more air to flow in and lasts more but the efficiency is the same. there are mini pleat 70mm laminar hepa that are just as good as thicker ones.
i was just thinkinh about building one of these today as i was trying to do agar work in my SAB and it kept fogging up and boom your video popped up. thanks!
Awesome! Ya a flow hood changes everything- I'll have the build video up hopefully by tonight.... along with a link to all the build plans with dimensions ect.
Question for you. I have a fan I would like to know if it will work, and if so, what filter should I buy. I would like to build a 24x36 or a 24x48 flow hood but want to be sure to get the right filter. The fan I have shows to be a multi speed unit depending on how it is wired or could be wired with a 3 speed switch. 950 cfm, 1200 cfm and 1450 cfm I tried to follow the curve but had trouble finding the right filter. Any help is greatly appreciated.
This really would have been a good place for affiliate links. Maybe 3, one of each size filter and then a link to the actual filter and a fan that would work well with that size filter.
thank you. I very appreciate you making this video. at the same time so much great info and you left out the more important. how much will this endeavour set me back ?
Hey Tony! I am a very big fan of yours 'cause you are a big motivator to me to cultivate mushrooms. I started to cultivate mushrooms like almost a year ago. I started with a big glovebox, but it is not enough now. Keep going! My question is that would it be enough to buy a 99.95% filter for the laminar flowhood, or the 99.99% is neccecary? Thanks in advance!
Thanks for the concise explanation regarding how you figure out the fan size - awesome job. In fact, thank you for all your vids. On a side note, i couldnt help but think that at 8.10 you remind me of Sheldon but with facial hair - I hope you go on to become as wealthy as he is😁😁😁
Whats the highest FPM you could get away with before it becomes an issue? Does faster moving air become a sanitary concern if you go too high or is the problem going to be it just blows away things of important?
Hi Tony, your video is really good and helpful. I am also trying to make my own laminar airflow hood after watching this video. For this i have ordered hepa filter of size 24"*36". But i have no idea about blower. Please suggest me.....
I was really sad to see there is no link to buy the astrocel 1 I looked on the plans and did not find where to buy that there either. Please please give me a link on where I can buy this filter
Hi Tony, been trying to build it, but i can only get the 24 x 24 inch Hepa Filter where im from and cant figure out which blower i should use, can you give me any pointers? thanx !! love what you do !!
I feel like I'll never have this answered BCS no one in the comments seems to know about laminar hoods/ nobody is replying to q's. I will just have to call! good video regardless!
Hi there! I'm having a tough time finding a fan that fits my 24*24 filter. The only one that that I could find was the same you used for your larger filter - which pushes 910 CFM at 1.3 wg. Is that overkill for my filter which only needs 400 cfm? Being that it was that much higher, would it no longer be laminar flow? Or as long as I'm higher than 400 cfm, will I be good?
Great video but I'm stumped on the fan. I can't even find any company that offers a fan curve graph like in the video. The only specs ever listed are a bunch of different flow rates for different "in sp", whatever that is. Not understanding those specs makes choosing a fan just a mystery.
@@FreshCapMushrooms my buddy is building me one with specs from your website. Your explanation of equations was a great help. I think this series of videos will be a great visual guide to what's on your site.
Awesome, ya I am going to be releasing the build plans for this one with dimensions and everything, I can definitely send you the plans I made a model in sketch up, on the next video there will be a link to get the exact plans.
Tony I followed your tutorial exactly but my flowhood isn't so laminar. It's blowing turbulent with uneven reading across the face. Can you help me troubleshoot what might be going on as there's not much I can find on it.
Hello, good video, I bought a Dayton 1TDR9, but in its curve the value of 1.3 inwg does not reach, it only reaches 0.8 inwg, my filter has an initial resistance of 250 Pascal, could the fan serve me? please I need your help, thank you very much
I followed your plans and now I have a beast of a lab. Thank you for your instruction.
Does this specific FH prevent you from getting contams? You feel like it was worth it?
This is a nice vid although he makes some important mistakes: He says you need a 99.99% (0.3 micron) efficiency filter, this is ULPA not HEPA, it is a mistake to use ULPA filters because they clog much faster than HEPA, they require more powerful (and more expensive) fans, and the additional filtration level is totally unnecessary. The primary thing you are trying to filter out is competing spores like trichoderma, if you do the research you will see that all of the common contam spores are well over 1 micron in size. Also the old school traditional design is heavy, not portable, and expensive. He also states that you need huge filters to get laminar flow - this is not correct. If anyone is interested in a light weight, VERY inexpensive, portable design, see my vid "Build Your Own Laminar Flow Hood for less than $100 (really WORKS!)". Wishing you the best everyone.
Thank you for sharing your own video, because after I saw he chose a $200+ , fan for his hood, I immediately wanted to know how much everything cost him, considering I've seen laminar hoods start at $300... Seems like a LOT of extra work to not save much (if any) money which seems silly unless you need the customization. But my interest is saving money, so I'll be watching your video now! 😊
@@MissBlackMetalwhere are you finding laminar hoods starting at $300?
Hi Gordotek, big follower of you! I do have a question to your comment though: As far as i know the filter classifications are as follow (0.1-0.3 microns):
H13: 99,95 %,
True HEPA: 99,97 %
H14: 99,995 %
U15: 99,9995 % (ULPA)
why not choose an H14 if you run a pre-filter, which would prevent clogging up the big H14 too fast? I know this build is definately more expensive, but i wanted a little bigger workspace and found a 24x24 Inch quite inexpensiveley over here in Germany.. of course the fan needs to be quite powerful (therefore more expensive) for my build but I guess that's what I am going with.. Would love to see a video of you if you by chance decided to build another model (maybe this time a reasonable-priced-high-end laminar flow hood.. Thanks for sharing your knowledge! Support @gordotek guys, really smart guy! Cheers
@@SimonRisspy where did you find the HEPA filter? What I found doesn't tell me the static pressure so that I can choose a fan. I'm also in Germany.
@@canercan2172 Hi there! I found some filters from htm-shop but had to contact them for the data sheets.. A suiting fan for that 610mm x 610mm filter + pre-filter I chose by looking through experience reports in forums.. I think it’s around 179€ though too (sold on eBay) - yet I unfortunately didn’t find the time for that build so far.. please keep me updated which route in building one you choose as I am always keen on exchanging experiences- I feel like the communities over here are not that big and sometimes lack of professionalism compared to the US based ones I have been following - but then there is the point that we just have other products available to work with 🤷🏻♂️
Probably the clearest example yet of how to choose the right fan...
took a min to get what he was talking about but was worth it in the end, thanks bro!!
Hey Tony, I’ve been searching for a proper blower fan for my 24”x24” filter….but getting these fan curves from the manufacturers is near impossible and finding a proper blower fan that fits your pressure criteria is also near impossible.
Edit: Reading the comments below, I think I found my answer, gonna put a dimmer on my powerful blower and gage the laminar flow of the air coming out of my filter using a flame test, the flame should not flicker. Also the dimmer allows to increase the power of your blower as the filter ages and gets clogged with more dust particles. Kudos for all the help.
Hey, this looks like a great idea, can you help me understand how to do this technique? im also building a 24 by 24 and using the TDU2 seems a little bit overkill, but maybe i can dimm it down like you are suggesting, did it work for you?
@@lautarogatti cant use a speed controller with a tdu2
Can you please put links in the description so we can buy or at least see codes of what we need?
Tony, from freshcap. I loved the educational value of this video as I recently have an interest in things such as hvac, mycology, and welding. It was great the way you explained the pressure drop, filtration percentages, fan curbs, and filter size. Back in school diagram boards like the one you drew went over my head. Now that its years later I'm finding that things such as this aren't so difficult to grasp. So thank you sir, please do continue!
So glad you liked it! It was kind of confusing when I first learned it so I wanted to try and lay it out in an understandable way. Building a flow hood really changes the game for growing mushrooms, so it's definitely worth doing! Of course, you could always just buy one, but building your own is a little more fun ;)
I followed your method step by step and built me the exact same one. I am so happy with it, I wish I can post video or picture of it. thank you for all your help.
You sir are a legend. So much love and gratitude 🙏🏻
Hello,
Great video. It seems that the Astrocel filters are gone. Saw them discontinued on most sites. Do you have a recommendation on another one to use?
One uneducated word of advice I have about fans is using either a squirrel cage fan OR my favorite type of fan is an inline blower fan. You can buy a fan that you know pushes more air than you need and you can just buy a variable speed knob that the fan plugs into and you can adjust the thrust of the fan by using the dial. I feel like thats much easier than doing a bunch of math and trying to get the EXACT fan and CFM you need.
Great video Tony and FreshCap. You certainly know your HEPA filters!
Looks like you've used an image of a Smart Air HEPA filter at 02:32 when you're comparing thin vs. thick HEPAs. Awesome! Just to clarify - you're right many filters from Home Depot are lower grad (e.g. MERV7 or MERV9), but all our filters are HEPAs that get 99.9% of particles.
But you're spot on - thicker HEPAs should be used when laminar flow is needed. More importantly, the HEPAs should have a honeycomb section to straighten out the flow once it's passed through the HEPA filter. You can see the aluminium (silver) honeycomb in the filter you bought at 03:48. That's vitally important.
We're big advocates of DIY air purifiers (and laminar flow hoods!), thanks for using our filter in your description!
Thanks for clarifying! I guess the important distinction is the thickness and the honeycomb section to help with the laminar flow. If laminar flow isn't required, the thinner filters can work just as well for scrubbing the air.
Hello, do you still sell these filters? If so can you provide a link?
Very much apreciate the cover of the calculation!
I can convert this freedom volumetric calculation to actual metric now ;)
Thank you Tony for all your sharing,Bonne Continuation.
Great video. I was planning on using a 24x24x5.8 filter. With a maximum filter flow capacity of 550 CFM, there are no affordable blower options capable of delivering this lower flow while at 1.3 inches of static pressure.The 24x24x11.5 filter would be compatible with the blower described in the video. Learning!
Thanks! Glad you are finding it helpful :)
did you end up using the TDT8 blower? or the TDU2 ?
This is fantastic information by god, i mean it's just fantastic knowing that this kind of knowledge is available to anyone in the world !
I watched these videos in the first place, you tell them very complicated, it is not that difficult.
1- The filter you choose should be Hepa H14 %99.99 and it should support laminar flow,
2- Find out the initial pressure and final pressure drop of the hepa filter. For example start 140pa - final pressure 450pa - maximum 600pa
pa = pascal
3- How many m3 of air passes your hepa filter per hour, for example 300m3
4- When choosing a fan, you will look at the table and there are pressure pascal values, starting 140pa, but this will increase up to 450pa when the filter is used.
5- You choose the fan according to the final pressure drop, that is, you will choose the fan that reaches a value close to 300m3 at 450pa end pressure.
6- You will get 1 dimmer speed controller for the fan. With this speed controller, you will slow down the fan speed and use the air flow you need at the initial 140pa pressure. As the filter becomes clogged, you will increase the fan speed and have the air flow you need.
My experiences: the air flow out of the filter is 300m3 / h, we will not release an air flow at this speed, when I turn on the fan, I reduce the fan speed and I watch a lighter or my gas stove burning stably in the laminar flow. I am not measuring how many m3 of passing air is per hour. I totally make an eye decision and a slight current is enough.
I have done liquid culture, tissue transfer, agar to spore print, spore syringe, spore print and zero contamination! It definitely works, do not worry about how to do it, refer to the items I have described above. I have read a lot of articles and there is indeed a lot of confusion. Don't waste any time, the basic logic is like this.
footnote: Maximum air flow to a hepa filter of 300m3 / h should not exceed 360m3 / h, laminator flow is disrupted, prefer slow operation instead of fast, while you are working, the medium is not circulating, if there is circulating, you can increase the amount of current.
So you don't need ~100fpm on the other side of the filter? I'm measuring 21-24 fpm. Good enough?
@@blakebeaton8410 Our measurement units and your units are different, but if you do it with the logic I said, you probably won't have any problems, use an adjustable dimmer. With the help of a lighter or candle you can tell if the flow is laminar or not, you don't have to use them every time. Too much flow rather than less creates turbulence.
Im curious about what kind of rate of m³/h your h14 has since you took 300m³/h as an example and all h14s I can find are at 1400 m³/h. Is this apropriate for a h14?
Im asking because that would determine how much the fan will cost and how much energy it needs. TIA
@@Omnipotent645 I just took the h14 filter and looked at the "pascal" value and bought a powerful fan to match the last projection "pascal" value when the filter was completely clogged. As the fan gets dirty, its pores are clogged, so the pressure value is constantly increasing. Since the fan I bought will normally be very powerful, I connected a dimmer to it, I make the dimmer setting completely blind. I see that the flame of my alcohol stove is laminar. The flame does not fluctuate. my h14 filter dimensions are 30cm x 60cm, if the dimensions of the h14 filter you are looking at are large, the m3 value will naturally be high. there is no problem with that. As for energy, I assume that you will not spend 8 hours a day at the beginning of this, the energy calculation is not very important, if you want to calculate how much electricity it consumes, you can calculate the power used by the fan. My h14 filter
Thanks for the invaluable info
Another very good, to the point with no fluff video and explaining exactly what I need. Thanks.
Timing couldn't be more perfect, thank you Tony!
Awesome! The build video is coming soon!
Visor on the Front of your box to force air down as well as Horizontally. Cheers
Your consistent. I need to work on my eye contact because I didn't get distracted not once.
Any idea how many duck power the motor should be?
Tony it would be very helpful if you answered the questions in your comments section because I have many of the same questions but you haven’t answered them previously so I won’t ask you again apart from that, great video
Box fan window cardboard box and painters tape and a furnace filter. Done
Great video. I've read several writeups for making these, but the video format just makes everything so much better. The fan curve graph is great.
Hi Tony. Great video. When you plotted the pressure drop of your HEPA filter on the fan graph y-axis , were you actually plotting the resistance of your filter? I am wondering if you needed to solve for the pressure drop as a function of the given flow rate and resistance on your filter and plot that, but I am not sure. I think given the speeds you operate at 800cfm is similar to the tested 1000cfm it wouldn’t matter if this is true, but trying to wrap my head around the fluid mechanics. Cheers and thanks!
Thanks for your videos they're very helpful, i have a question can i use a hepa 14 pre filter 16x25x1 just to get better inoculation and that wouldn't force the blower, i bougth flanders filter 21.75" x 37.25" x 6.375 and 1tdu2 Blower, thanks a lot and waiting for your reply
these 2 videos are so good, thanks alot Tony! saving at least half a grand by making my own now.... and for a bigger size!
could you put a link to the best place to grab those filters?
Heres the blower electricmotorwarehouse.com/dayton-model-1tdu2-blower-1202-cfm-1390-rpm-115-230v-60-50hz-4c831/
@Gordo TEK nice. Thanks for the heads up
@Gordo TEK that is 99.97 where he recommends 99.99. Just sayin
Eric P were you able to find that filter?
Any european sources for anything at all? :(
Great production. Thank you.
How would one test and verify that a laminar flow has been achieved? Thanks again!
Now this video im loving right here 😍 🙌
How long it take u
I can not fined a 24x48 filter do you have a source I can get one from. Thanks all your videos are super helpful
Tony, you are the man.
I was wondering you would suggest using an inline fan for the build. I have a fan that is 720 cfm and can't seem to find any info.
Some fans are rated in PA (pascal)
~250PA = 1INWG
Can you link us to what you purchased online please
Advice for anyone seriously considering this project: Don't waste your time (like me) looking for a less powerful fan to use on a smaller filter (24x24) in order to save some money. If it's true that most filter's have a resistance of 1.0 in.wg along with a prefilter of .3, then the ONLY squirrel cage blower that moves air at that resistance is the 1TDU2. The closest runner up is the TDT8. This of course also assumes the 100 FPS is the minimum requirement for laminar flow. I'm taking him at his word on that.
Had someone told me this before, it would have saved me a couple of hours. You're welcome :)
Yep, agree! I ended up doing all the research and came to the same conclusion! Dayton 1TDU2!
@@BoomerShroomer Yep! I'm very happy with it, though I wish that it came with mounting flanges. I ended up using some L flanges I bought from the hardware store, but it worked great!
@@BoomerShroomer have either of you have any issue with the homemade flow hoods? Or are they effective w/ high success rate
I finally finish my flow hood & made a few changes, lmk if you would like a photo. Ty.
I would like to see it. Instructions will also be helpful. Thanks.
@@miyervang9338 where would u like me to send you photos?
references to where you bought them would had been cool
Hi, thanks for the amazing video Tony! Can anyone tell me if the material of the filter is important, apart from the efficiency rating? I bought an AstroPak filter, with a rating of 99,99% efficiency but not made out of metal (made out of paper / fabric like material). Does this matter? (sorry if this is a stupid question!)
I would be curious to hear the answer here too if anyone can chime in...
Clear and to the point. Good advice as always.
Thanks! Stay tuned for part 2! :)
Just a thing, thickness doesn't influence efficency rather it changes the maximum air flow. a thicker filter allows for more air to flow in and lasts more but the efficiency is the same. there are mini pleat 70mm laminar hepa that are just as good as thicker ones.
Could you run a high velocity fan?
If we modify more, and place glass room in front of this, is it also work for tissue culture or bacterial culture
how big of a room should the laminar flow hood be in? would a grow tent work as a "clean room" using the flow hood inside?
i was just thinkinh about building one of these today as i was trying to do agar work in my SAB and it kept fogging up and boom your video popped up. thanks!
Awesome! Ya a flow hood changes everything- I'll have the build video up hopefully by tonight.... along with a link to all the build plans with dimensions ect.
Hello 🙋🏽♂️ I'm in Cameroon and I'm having trouble finding the hepa filter as well as the pre-filter. Can I have a suitable link?
Do you have suggestions where to buy a reasonably priced HEPA filter for a laminar flow hood?
Could I tape a vent hepa filter onto a box fan?
Question for you. I have a fan I would like to know if it will work, and if so, what filter should I buy. I would like to build a 24x36 or a 24x48 flow hood but want to be sure to get the right filter. The fan I have shows to be a multi speed unit depending on how it is wired or could be wired with a 3 speed switch. 950 cfm, 1200 cfm and 1450 cfm I tried to follow the curve but had trouble finding the right filter. Any help is greatly appreciated.
We have residential MERV 13 filters that we use with a box fan to remove smoke particles while cooking. Would this work for a makeshift flow hood?
This really would have been a good place for affiliate links. Maybe 3, one of each size filter and then a link to the actual filter and a fan that would work well with that size filter.
Wow! So extremely well explained, fantastic brotha! Your killin the game!
Much ❤❤😎
This was really really helpful and easy to understand. Thank you for sharing this information.
Thanks for Sharing. You helped me so much. I spared no expense and copied exactly
Please tell me where to buy that exact filter?
how many 24 inch box fans would this use?
what kind of blower it should be, low or high presure?
thank you. I very appreciate you making this video. at the same time so much great info and you left out the more important. how much will this endeavour set me back ?
Air velocity measurement : what distance from filter ? Any standard ?
Hey Tony! I am a very big fan of yours 'cause you are a big motivator to me to cultivate mushrooms. I started to cultivate mushrooms like almost a year ago. I started with a big glovebox, but it is not enough now. Keep going! My question is that would it be enough to buy a 99.95% filter for the laminar flowhood, or the 99.99% is neccecary? Thanks in advance!
Great video! You're great at explaining stuf! Is it bad if the fan will be stronger then what I need for my filter?
Thanks for the concise explanation regarding how you figure out the fan size - awesome job. In fact, thank you for all your vids. On a side note, i couldnt help but think that at 8.10 you remind me of Sheldon but with facial hair - I hope you go on to become as wealthy as he is😁😁😁
Whats the highest FPM you could get away with before it becomes an issue? Does faster moving air become a sanitary concern if you go too high or is the problem going to be it just blows away things of important?
Finished building mine last night - thanks for this awesome guide!!
Have you used it? Is it reliable and effect? What are your success rates?
Can this same fan be used for 24x24?
Hi Tony, your video is really good and helpful.
I am also trying to make my own laminar airflow hood after watching this video. For this i have ordered hepa filter of size 24"*36".
But i have no idea about blower. Please suggest me.....
shyamvir singh did you get your flow hood made?
Laminar Flow Cabinet manufacture
Contact Paris
sales05@faithful.cc
Skype: paris_faithful
Wow Thanks Tony!
So if I have an anonometer and test it on my flowhood basically it needs to output 100fpm?
Fantastically detailed spec video. Exactly what i needed! Great info explained simply.
We need a part 2
Coming soon!
Can i use a 48" x 24" x 2" 2/3 filter? Or 6" Is the best width?
what if i put 2 hepa filters of the thin ones, instead of one of the thicker ones? it'll still work? thanks
Put the fan at a distance and port air via a duct, that way you can put the fan at a distance its noise is not an issue.
I was really sad to see there is no link to buy the astrocel 1 I looked on the plans and did not find where to buy that there either. Please please give me a link on where I can buy this filter
Thanks so much Tony...
You are very welcome! Thank YOU for watching :)
Yes, I was waiting for this. Awesome
Perfect! This is exactly what I’ve been looking for! Thanks man!
Happy to help!!
Can you tell us where did you buy the filter
Hey man, much appreciated for all you are doing...
Thanks for watching! Glad it is helpful :)
If I have a fan that is too powerful for my filter, can I use a control knob and find 100fpm post-filter with an anemometer?
Do I need a pre filter specific to my hepa filter or flower fan? How can I find the resistance on the pre filter also?
Super good video.
Hey, thanks for the video. Those filters are pretty expensive. Are they washable/reusable?
I have searched high and low for a place to buy this exact filter and I have a headache now please where can I buy this filter
Great stuff! Love your work! Very inspiring!
great vid!
Hi Tony, been trying to build it, but i can only get the 24 x 24 inch Hepa Filter where im from and cant figure out which blower i should use, can you give me any pointers? thanx !! love what you do !!
www.hepaflow.org/ this wesbsite carries all sizes
I feel like I'll never have this answered BCS no one in the comments seems to know about laminar hoods/ nobody is replying to q's. I will just have to call! good video regardless!
What's the question??? Lmao
About how much should we expect to spend on the whole project?
looks like $500+ just on amazon for the filter and blower
Hi there! I'm having a tough time finding a fan that fits my 24*24 filter. The only one that that I could find was the same you used for your larger filter - which pushes 910 CFM at 1.3 wg. Is that overkill for my filter which only needs 400 cfm? Being that it was that much higher, would it no longer be laminar flow? Or as long as I'm higher than 400 cfm, will I be good?
Came here to ask this same question 🤔
Which type of hepa should I use? Deep pleated one or mini pleated one? I contacted a filter manufacturer and they are asking me the same question ⁉️
Great video but I'm stumped on the fan. I can't even find any company that offers a fan curve graph like in the video. The only specs ever listed are a bunch of different flow rates for different "in sp", whatever that is. Not understanding those specs makes choosing a fan just a mystery.
Where did you come up with 100fpm ?
I found blower fan on Amazon but I can not find astrocel 1 hepafilter. Where can I buy this
Very timely video!
Good stuff! Hopefully it helps! I am coming out with the "build" video and build plans very soon. Hopefully today :)
@@FreshCapMushrooms my buddy is building me one with specs from your website. Your explanation of equations was a great help. I think this series of videos will be a great visual guide to what's on your site.
Awesome, ya I am going to be releasing the build plans for this one with dimensions and everything, I can definitely send you the plans I made a model in sketch up, on the next video there will be a link to get the exact plans.
@@FreshCapMushrooms he's almost done building the 24" x 24" so I'll be using that for a while.
this makes me feel like i'm not smart enough to grow anything lol
You’ll get there, just practice like mad
Tony I followed your tutorial exactly but my flowhood isn't so laminar. It's blowing turbulent with uneven reading across the face. Can you help me troubleshoot what might be going on as there's not much I can find on it.
Is this good for plant tissue culture too?
Hello, good video, I bought a Dayton 1TDR9, but in its curve the value of 1.3 inwg does not reach, it only reaches 0.8 inwg, my filter has an initial resistance of 250 Pascal, could the fan serve me? please I need your help, thank you very much
fun with the flags :D