ฝัง
- เผยแพร่เมื่อ 23 ก.ย. 2017
- I talk about my homemade fume hood: the cost, type of materials, general design plan, and give a few tips.
Interesting and original video coming next weekend! Let's just hope that it's sunny for the next week. I was going to make a thiourea dioxide video but then chemplayer... A while ago I was going to make a video on getting casein out of milk but then NileRed did that one right when I was going to film. - วิทยาศาสตร์และเทคโนโลยี
Good inspiration, I'm planning to build my own. For an absolute diy noob like me the front will probably be the most difficult to do.
Man thats a beautiful build! I am looking to build one myself soon, and damn this gives me some inspiration!
You should make it a patreon goal ;)
I am busy building mine but I have my own design. Should be finished in 2 months.
Holy shit man that’s amazing. Fume hoods are going for 4 grand plus!
Nice! I hope to make one myself one day. I would love to have a little fun playing with chemicals at my house. I majored in chem, I miss the days in school where I had access to my schools fumehoods and laboritory.
I'm new to your channel and I've got to say I like what I've seen so far! Looks like you do some high quality work. Great fumehood! My recommendation based on the "real" fumehoods I've worked with would be to cut the holes you talked about in the middle of your baffle, not the top of your plexiglass. Holes in the top of the plexiglass would make gas escape more likely. Holes in the middle/top of the baffle encourage the flow of gas through the fumehood to be laminar, rather than turbulent, which is ideal for removing gasses without backflow
Looks very professional and inspiring to build my own
Good job, and what a saving you made! 👍
Nice build. Thankyou
My only concern that should already be aware of is the danger of venting some potentially dangerous vapors out into the air, especially around your house. Some aren't EPA friendly, some aren't human friendly in quantities (good ol' carcinogens), and some can just damage your siding etc.
Are you using any kind of air scrubber?
Otherwise 9/10 on the build. I'm probably going to be making something very similar
You can always add carbon filter
Damn if only I had the space and money for this haha. I would sooo do it.
I hate working outside because there is so much to worry about. The main being the weather. Too much wind makes things frustrating and unsafe. Different temperatures can make some reactions challenging, and I have had glassware crack from running a hot reaction and having a random quick drizzle of rain drop one single cold drop on the glass. Enough to give my erlenmeyer flask a good crack on the neck. By the way thank you so much for your videos. I really enjoy them! I am looking to get wayyy more into organic chemistry than I used to be and currently have a few synthesis planned. One being a transesterification that will make methyl ricineolate which is a biodiesel. Another is making chloral butanol because I have always wanted to make some type of chemical that can have other side effects besides death haha.
It really means a lot to me because I used to only do inorganic reactions. Then I went on to organic reactions and quickly became infatuated with explosives synthesis. I made a lot of different ones and got to do a LOT of really freaking cool and fun stuff. I learned a load of stuff along the way and was always very safe. I am losing interest now as I want to dive deeper into organic chemistry in itself. I have always loved chemistry and it's one of the subjects along with math that just kind of clicks. I can seemingly envision what's happening at the molecular level and it helps me a lot. It's really weird but I excelled in my chemistry classes.
I have taken a college chemistry class and enjoyed it but we never really dove deep into organic chemistry. Most of the class ended up being a lot of theory (which don't get me wrong, I love learning how things work especially at this small level) but not a whole lot of reactions or synthesis. I am taking o-chem next semester and I am sooo freaking excited I can't wait. I didn't really like the teacher too much but funnily enough, one of my least favorite teachers (she's not too bad, she teaches really well and can be pretty funny but she has a very cocky attitude which kind of stuck and I couldn't shake it) was the teacher I will have for the most amount of time.
I currently have some nice glassware such as the usual beakers (I broke a few though RIP), erlenmeyer flasks, round bottom flasks (my first large scale glass ware was my 1 liter round bottom flask which came in very handy), a liebig condenser, vigreux coloumn, test tubes, etc. but I am getting ready to up my game with a proper magnetic hot plate stirrer, 3 necked round bottom flasks, separatory funnels, addition funnels, as well as buchner funnels (I currently have my self made vacuum filtration set up but professionalism can go a long way). I am too broke to get all of that at once since glassware is so freaking expensive here but I will get a much better lab setup. I'll also probably build myself a mini fold-able shed that I can set up outside so the wind and rain won't interrupt me as much.
But yea thank you for your videos and keep up the amazing work!
How about a kiosk? I imagine something like a really airtight popcorn cart.
Hey I have that same hot plate it's my favorite
Thanks bud, old video but helpful
"...was going to make a thiourea dioxide video..." "...was going to make a video on getting casein out of milk but then..." lol there is a lot of competition out there. hahahahaha Its all good. Seems like all the lab folks comment on each others videos anyway. I am sure your version of a video would be slightly different. Might as well go for it!
If you have the time, I am curious about the "five sided wooden box that was a few inches deep, which the duct work from the fan attached to". I just can't get my head wrapped arounf how that was applied to the back and how it worked in the design. Thank you
Have you experienced any trouble with acid fumes attacking the outside of your house where the venting happens?
How long did your exhaust fan last?
oh man $210 for a fumehood this size and this quality is the best deal in a life time. mines cost thousands of dollars and yet I often have issues fitting apparatus into my fumehood.( i was being a little cheap, Should've got a larger one)
The best deal I've ever gotten was a $700 vacuum pump for $5 :), but yeah it is a good deal. The commercial ones are very put together, but I couldn't come up with the money to get the size that I wanted.
Nice job man! I'm working on building a fume hood and I'm quite a novice. How did you design the baffles? I have so many questions haha...
The baffles weren't too difficult to put in. First I cut and screwed together the two sides plus the top and bottom. On the back I then screwed on the appropriately sized piece of 1/4 inch wood (just one piece) so that it looked right, leaving a few inches open at the top and a larger opening on the bottom. Onto this I attached a five sided wooden box that was a few inches deep, which the duct work from the fan attached to. This directed air flow behind the baffle.
Feel free to ask me any questions, here or on email.
Tom's Lab what's your email? It would be really helpful to bounce ideas off someone.
Tom's Lab how necessary are baffles though, surely with a high CFM there wouldn't be much leakage right?
My email is diphitom@gmail.com
Baffles are not mandatory, but are helpful. They reduce swirling air currents inside the hood, removing the gasses inside more effectively. The won't be leakage either with or without, given the fume hood is built and sealed correctly.
The fume hood looks great, I was hoping to see some type of filtration system though.
Is that fan explosion proof / sparkless?
Can you show how to make ANILINE DYE? (PURPLE MAUVE) color.
Hey Tom, Ive been having trouble with my hood door and I like the way you split yours. Unfortunately I'm on a massively tight budget and limited tools. I can split the plexiglass but trying to assess how to mount them so they slide AND stay in place the way yours does. My other issue to resolve first is my wood is bowed, lending further to my problems lol. Do you have any advice? I almost went with a motor driven pulley system but that would compromise the seal and kill my face airflow
It might also be notable, I'm using lightweight materials so that it's more easily portable since I'm in shared living quarters and all. I don't find much issue with smell or anything with my tests of the air system but I'm afraid further reinforcing the sides and possibly allowing for a proper fume hood door fitment would need more permanent space to stay. It's made of 1x0.25" wood beams and mylar walls with a plexiglass door and the most inert caulk I could find for sealing
Any fitration on the fume extractor / blower? Activated carbon, or just blowing out?
I was thinking about the same ? How does big labs handle this ? Is it multiple times filtration or just a active charcoal filter
u really need ceramic or glass construction you should get some house tiles and glue the around the interior, and get a piece of custom glass from a pool fencing place for the door so when something blows you're behind the strongest part.
The material is surprisingly resistant. I have spilled solvents on it and even nitric acid (70%) with no effect. I like the custom class idea, that's my plan for sometime in the near future.
Tom's Lab I decided ill go with a stationary cabinet and line it in ptfe sheets that I can get custom cut. Not sure if I'll use the glass as it might tip the whole thing forward with it's weight. Maybe if I use ceramic as the base it'll have the weight to stabilise.
How is the plexiglass airtight if there’s two seperate pieces if they slide over each other?
Negative air flow. It just has to have enough draw to pull air in the front and out the back.
Hello,you pay for made this fume hood how much?in china ,a new fume hood just need $600
Dumb question here; but if you have some serious acid vapor, does it just go outside where people and pets are? Or are you pretty remote where that’s not a problem?
Was thinking the same lol 😆
rip neighbors
cool, i plan to make something similar buuut i don't have the space and a free window/opening
i'll save that video for later reference when i do have the space
maybe i'll do a tiny portable fumehood when i really do need ultra safety
what filters do you use the the output? basic carbon between the hood and the fan?
I didn't use any filter on the output. I'm not that concerned about the blower because I never put too much through it (using gas scrubbers when I can), and with the high flow rate the concentration of corrosives is very low. If the fan lasts a year I will be happy because that will still be cheaper than the cost of buying a fan actually designed for a fume hood. In a couple months I will check the internals to make sure all is good.
Have you ever had any problems with smells outside, maybe even the neighbours getting suspicious?
Nope, never noticed any smells outside. As for my neighbors, they already know, I actually gave them a tour.
Tom's Lab pretty chill neighbours you got there
kalrbaum my neighbour is a little messy bitch ^^ (he hates me really hard)
I have to share the shop with him (50cm^2) ... i told him that i work with chemicals and i don't want to scratch off his dead body...(so he dosen't try to open my cabinet with chemicals...)
I clean stuff after i'm done and i store stuff properly (some locked some just on the bench)
That's why i don't have the place for a hood, his shit is everywhere (and the boss of the building dosen't give a shit)
Also the neighbours outside the shop are bitches they are too curious of everything
Can we have the schematics?
can u take your "very cheap powerstrip" out of the hood ffs :D
Lol it's too much work to take it out now, but yeah I never use it and it's a sparking hazard.
Tom's Lab. The cheap ones arc everyrime 😅. Also if you were after good filtration vacuum HEPA filters you can buy round 100mm ones that fit perfectly into 100mm pipe so you can stack a few in a row and use 2 100mm centrifugal fans in push pull to eliminate 99.9% of particles. They are very cheap less than a few dollars each. I also plan on using carbon impregnated webbing. For dual filtration. Will probably post a video in a few weeks.
$210 3 yrs ago x .65 equal $410.