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krypto2000
Unknown


Registered: 12/05/06
Posts: 11,579
Last seen: 4 years, 3 months
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Poor mans flow 'hood' idea.
#18736785 - 08/21/13 10:30 AM (10 years, 6 months ago) |
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I haven't tested it yet, but I don't see why it wouldn't work. If you're used to doing your work in the open air and you have a ceiling fan in your house it might be worth it to work under it and simply put it on the lowest speed on winter mode. If you don't know what this does it simply spins in the opposite direction and pushes the air up to the ceiling instead of the other way around. Actually I'm not sure if it's winter or summer mode now that I think about it, but just hold your hand underneath and/or above the fan blades and you should be able to tell which way it's pushing the air. You'll probably want to clean your fan first if it's dusty or else you risk simply throwing spores around. Another idea I had is to heat up your work surface in the oven to about ~60c (~140f) or so to encourage an upward draft and work on that as well. I simply use my cutting board for this. Again I haven't done any kind of controlled tests, and haven't tested the fan method at all yet, but logically it makes sense and can't be worse than working in the open air.
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rew736
Your local stranger



Registered: 12/17/12
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Re: Poor mans flow 'hood' idea. [Re: krypto2000]
#18736804 - 08/21/13 10:37 AM (10 years, 6 months ago) |
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A fan spinning in any direction would just move spores around. The reason a flow hood works is because one side of the filter is never contaminated. If you just have a fan well then you blow around spores and it will be worse. If you cant have a hood, get a SAB.
-------------------- My trade list malicom said: "Banana's emit radiation. In fact banannas are the standard in detecting solar radiation. The radiation read from a bananna tells scientists how active the sun was during the growing season. Make sure to steer clear of bananas too." seekaytea said: "I need to stop spending all my money on plants and take up a cheaper hobby, like heroin." Wiccan_Seeker said: "Your knowledge on male-on-male rape and willingness to engage in fantasy regarding the matter is commendable." eminemvs.slimshady said: "I want to know if they are active and magic or not. And if they are not active, can i pick them before they are active and then they will become active or do they have to grow till they activate?"
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Trippy_Penguin



Registered: 03/18/12
Posts: 624
Last seen: 3 years, 5 months
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Re: Poor mans flow 'hood' idea. [Re: krypto2000]
#18736814 - 08/21/13 10:40 AM (10 years, 6 months ago) |
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Quote:
krypto2000 said: but logically it makes sense and can't be worse than working in the open air.
My logic brought me to a different conclusion. A flow hood provides a laminar flow of clean air. Key words laminar and clean. A fan can offer you neither of these.
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Psilosopherr
A psilly goose



Registered: 02/15/12
Posts: 12,278
Last seen: 2 months, 3 days
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Re: Poor mans flow 'hood' idea. [Re: rew736]
#18736816 - 08/21/13 10:41 AM (10 years, 6 months ago) |
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yeah that will just make contams worse. Good on you for trying though, maybe that reversed fan can be useful in some way..
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krypto2000
Unknown


Registered: 12/05/06
Posts: 11,579
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Re: Poor mans flow 'hood' idea. [Re: rew736]
#18736819 - 08/21/13 10:41 AM (10 years, 6 months ago) |
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This is for people who do not have a SAB or obviously a flow hood, I'm not proposing it as an alternative to the above. Sure it would move spores around, but it doesn't matter so long as the current is right, they'll get sucked upwards before they fall into your jar/agar dish. Just hold a cigarette under it to see which direction the smoke goes, that's what's going to happen to your airborne spores. If it goes down at all then you have too much force on the fan/your room is too small and it won't work. The hot work surface is still a good idea though which should work no matter what.
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Psilosopherr
A psilly goose



Registered: 02/15/12
Posts: 12,278
Last seen: 2 months, 3 days
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Re: Poor mans flow 'hood' idea. [Re: krypto2000]
#18736835 - 08/21/13 10:43 AM (10 years, 6 months ago) |
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Quote:
krypto2000 said: This is for people who do not have a SAB or obviously a flow hood, I'm not proposing it as an alternative to the above. Sure it would move spores around, but it doesn't matter so long as the current is right, they'll get sucked upwards before they fall into your jar/agar dish. Just hold a cigarette under it to see which direction the smoke goes, that's what's going to happen to your airborne spores. If it goes down at all then you have too much force on the fan/your room is too small and it won't work. The hot work surface is still a good idea though which should work no matter what.
this is starting to get idiotic. It will be open air, except there will be this radial air current that will be throwing spores and air all over the damn place. Just because the air goes up doesn't mean it STAYS up.
It hits your roof and then goes everywhere else
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FrankHorrigan
The Inquisition



Registered: 01/04/11
Posts: 10,573
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Re: Poor mans flow 'hood' idea. [Re: krypto2000] 1
#18736848 - 08/21/13 10:46 AM (10 years, 6 months ago) |
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It's going to blow shit all over your work. No way around it.
This idea does not work.
You're better off making a shit cardboard box with 2 holes in it and working in there.
krypto, my man, are you high as fuck all the time lately or something?
There is some weird stuff coming from your corner on a regular basis this month...
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SpitballJedi
Ancient Astronaut


Registered: 10/13/12
Posts: 8,598
Loc: Nibiru
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Re: Poor mans flow 'hood' idea. [Re: Psilosopherr]
#18736878 - 08/21/13 10:51 AM (10 years, 6 months ago) |
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the smoke will go up even if the fan is off.
No fan would be better because at least the air will be more still.
Not everything is going to get sucked up in to the fan, and what does will just get recirculated around the room.
Didn't you build some massive SAB one time?
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Psilosopherr
A psilly goose



Registered: 02/15/12
Posts: 12,278
Last seen: 2 months, 3 days
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Re: Poor mans flow 'hood' idea. [Re: SpitballJedi]
#18736974 - 08/21/13 11:14 AM (10 years, 6 months ago) |
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Quote:
SpitballJedi said: the smoke will go up even if the fan is off.
 the OP's logic is great
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krypto2000
Unknown


Registered: 12/05/06
Posts: 11,579
Last seen: 4 years, 3 months
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Re: Poor mans flow 'hood' idea. [Re: Psilosopherr]
#18737103 - 08/21/13 11:53 AM (10 years, 6 months ago) |
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Of course the smoke will go up because it's lighter than air, you compare the speed at which it goes up and the direction. It's not a dumb idea at all. If you're in a perfectly square room with no furniture in it sans a table and the fan is spinning slowly enough it will create a circular air current. It will flow up from the center of the room, down the wall, and back up the center. This is basic physics.
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Psilosopherr
A psilly goose



Registered: 02/15/12
Posts: 12,278
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Re: Poor mans flow 'hood' idea. [Re: krypto2000]
#18737121 - 08/21/13 11:56 AM (10 years, 6 months ago) |
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Quote:
krypto2000 said: Of course the smoke will go up because it's lighter than air, you compare the speed at which it goes up and the direction. It's not a dumb idea at all. If you're in a perfectly square room with no furniture in it sans a table and the fan is spinning slowly enough it will create a circular air current. It will flow up from the center of the room, down the wall, and back up the center. This is basic physics.
please, pretty please, try your tek. See your contam rate and report back. Prove us all wrong
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FrankHorrigan
The Inquisition



Registered: 01/04/11
Posts: 10,573
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Re: Poor mans flow 'hood' idea. [Re: Psilosopherr]
#18737140 - 08/21/13 12:00 PM (10 years, 6 months ago) |
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We can all argue back and forth til we're blue in the face.
Won't change the fact that your work is going to be contam'd to hell.
Try it out krypto.
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krypto2000
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Registered: 12/05/06
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I am going to try it because it's the only way to find out. I stopped coming to this forum for the most part a couple years ago because it was all the same shit, no improvements, just the same old ideas again and again. I come back and unsurprisingly nothing's changed outside of bubble wrap . This place is using teks from 5-10 years ago and is scared to forge their own path and advance the hobby. Sure not every idea someone throws out there is going to work, including my own of course, but you guys just shoot it down not on logical grounds but because it doesn't follow a single proven method from the past.
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FrankHorrigan
The Inquisition



Registered: 01/04/11
Posts: 10,573
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Re: Poor mans flow 'hood' idea. [Re: krypto2000]
#18737475 - 08/21/13 01:19 PM (10 years, 6 months ago) |
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Actually we shot this down on very logical grounds, and I asked what the hell you're so high on lately
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krypto2000
Unknown


Registered: 12/05/06
Posts: 11,579
Last seen: 4 years, 3 months
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My horse.
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FrankHorrigan
The Inquisition



Registered: 01/04/11
Posts: 10,573
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Re: Poor mans flow 'hood' idea. [Re: krypto2000]
#18737524 - 08/21/13 01:36 PM (10 years, 6 months ago) |
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That is very true.
I was hoping there was a reason for all this stuff from you lately but...apparently not 
Let us know how the fan running while doing sterile work goes for you.
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kinkaku
I AM THE LAW!!!!




Registered: 04/02/13
Posts: 1,322
Loc: Россия
Last seen: 8 years, 1 month
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a fan will create a whirlpool of air in your room and in that whirlpool will be all the evil spores. it will be like one big contam merryg-go-round.until they get on your work area and everything else.
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toxetel
׀ǝʇǝxoʇ ●


Registered: 08/13/12
Posts: 708
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So the fan sucks the air upward, away from the space you're working in... What do you think happens to the space you're working in? Does it become a vacuum? Are you no longer able to breathe because the fan sucked away all your air?
Of course not. Air moves in from your sides to replace the air the fan is pulling up. Dirty air. Air that just ran over your floor. Air that just ran past your clothes. Past your body. Air full of contaminants. Contaminants that will land on your work and ruin your day.
You either want to work in a laminar flow of sterile air, or in still air.
If you have to work in open air, turn off all your fans. Cover any ventilation ducts. Close all the windows. Turn off all electrical devices and light or heat sources, save one that you use to see what you're doing. Spray the air with a fine mist of some kind of air sanitizing spray and wait for it all to settle. That'll make your work air as still and clean as possible without spending the three dollars on a cardboard box and plastic wrap required to make a basic still-air box.
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PhosCap
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Re: Poor mans flow 'hood' idea. [Re: krypto2000]
#18737561 - 08/21/13 01:46 PM (10 years, 6 months ago) |
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to test put some open agar dishes under the fan for a few hours. Then put open agar dishes in a SAB for a few hours. The SAB will prob win
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kinkaku
I AM THE LAW!!!!




Registered: 04/02/13
Posts: 1,322
Loc: Россия
Last seen: 8 years, 1 month
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Re: Poor mans flow 'hood' idea. [Re: PhosCap]
#18737578 - 08/21/13 01:49 PM (10 years, 6 months ago) |
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Quote:
phosi said: to test put some open agar dishes under the fan for a few hours. Then put open agar dishes in a SAB for a few hours. The SAB will prob win
maybe a few seconds or even a minute lol but an hour and even the one in the sab will contam.
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