10" Inline Fan Sufficient for Indoor BHO Extraction ?

Hey Guys,


I'm hoping you can answer a safety question for me - will a 10" inline blower work as an adequate exhaust fan if the setup is in a 8'x6' shed with a 8000 btu A/C blowing from the top? Will be open blasting, not closed loop. The only caveat is that the fan isn't listed as explosion proof. The ebay seller's response is below:

"Anything that is electrical or composed of metal can cause static.

If you are asking if this fan will cause RF static..the answer is no. Some poor quality ballast will cause RF static ( when you are listening to AM radio, you will hear static)...but this fan does not cause that.

To be safe..mount the fan outside of your sealed room...there is nothing spark proof when you are dealing with electrical components. The best thing is to mount the fan outside the "hazardous" room and use pvc ducting to draw the air out"

Do you think the fan will be sufficient or should I spend the extra 500 on an explosion proof fan?

Inline Fan linked here: http://www.ebay.com/itm/10-Inch-Inli...:X:RTQ:US:1123

Thanks in advance for your responses and keeping it safe!

The problem I see first is that butane likes to pool on the floor and your vent fan is going to be near the ceiling, yes?

Why not have a bunch of sizeable vent holes around the shed at floor level, then blow fresh air IN? That would evacuate the butane very effectively. You wouldn't need an explosion proof fan, either.

I see a lot of what I consider safety issues....for one the whole idea behind this is so you can open blast inside an enclosed area....do you realise how explosive gaseous butane is?

two, why are you going to be running an air conditioner in this room? I dont think using anything electrical near this bomb your making is a good idea.

three, your planning on pulling these butan vapors through an inline fan....all I can picture is this fan igniting those vapors and having flame travel through ductingtill it gets back to this explosive room and kills you.

basically I can only see this plan ending badly, please dont do it.

In short, NFW!

Even if we were talking CLS, you don't have enough air flow to guarantee you won't exceed 25% of Lower Explosive Limits (LEL) with a leak.

You are missing one dimension, but if we ASS-ume 8' for the purpose of discussion, An 6' wide X 8' tall shed would have a face area of 48 ft2.

According to Industrial Ventilation, by the American Conference of Industrial Hygienists, to meet the ventilation rates required to insure less than 25% of LEL is about 100 surface feet, so you would require about 4,800 cfm.

You will also need a non sparking explosion proof centrifugal fan, to reach the static pressures necessary to convey at 1000 surface feet, and not produce sparks if something hard goes through the blades, and a design where the TEFC motor is not in the central air stream.

While that air flow may seem excessive to you, consider the following:

1.0 One ounce butane liquid occupies about 2.9 cubic inches.
2.0 At 235:1 expansion ratio, that produces 682 cubic inches of vapor.
3.0 At a 1.86% LEL, that produces 37,889 cubic inches of highly explosive mixture.
4.0 When ignited at 21C/70F, it produces a 1970C/3578F fireball, which expands that mixture to 287,956 cubic inches, or about 167 cubic feet.

That hot expanding gas is looking for a way out of the enclosure, and will make one if an adequate one isn't available.

In perspective, 2.9 cubic inches of liquid, suddenly expanded to occupy 43% of your 6X8X8 shack, at temperatures higher than molten steel, would take the roof off and seriously burn pretty faces, soooooooooo dumping even larger quantities open blasting, with inadequate air flow from a fan capable of acting as an ignition source, is a seriously bad idea (contraindicated).

Please don't do it!

find a safer and smarter way to make your hash man, its never worth dying or worse walking around looking like Freddy Kruger because you wanted to get high/medicated. if you do it right it can be quite safe, if you don't well.......BOOM

I did an open blast in my 40'x60' shop with a fan blowing out the door. I was working between the fan and door. I finished up. Several minutes went by and I unplugged the fan and felt a big warm cloud of heat. Scared the shit out of me.

DO THIS SHIT OUTSIDE. PERIOD.

Also if you havent researched enough to know to only blast butane outdoors then you should definately read some more.......maybe check out some safer waysto make oil

Thanks for the quick replies. How would I stop contaminants from getting into the collection pot if blasting outside? Would it matter that the column is only a 90g capacity? Is it ok if I do the initial blasting outside and then the pour inside the ventilated shed? I planned on cutting several vents in the bottom with the AC mounted on the opposite top side to blow cold air down and push the gas through the vents.

just blast out side. and don't let your buddy stand there with a cellphone recording and taking pics bad things happen with electronics and butane. amd no when you pour you are creating a bigger plume of gas. just blast it outside and place your blasting dish in a hot water bath OUTSIDE and just keep changing the hot water until no more reaction from hot water, then and only then would I take it inside to scrape for the vac oven/chamber

Exactly what R&R said plus watch what you wear while blasting even static in your sweatsuit can cause enough spark to blowup you or your neighbors

smh....

If you want to avoid contaminates, just throw a cloth over your collection dish and make sure it doesn't sag. The butane will still escape

Kief_Sweat said:

Thanks for the quick replies. How would I stop contaminants from getting into the collection pot if blasting outside? Would it matter that the column is only a 90g capacity? Is it ok if I do the initial blasting outside and then the pour inside the ventilated shed? I planned on cutting several vents in the bottom with the AC mounted on the opposite top side to blow cold air down and push the gas through the vents.

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If you spray the area down beforehand, it will help keep down the dust, and you can put cheese cloth over top.

Yes it absolutely does matter that you have a 90 gram column, with a volume of about 3.17466 ounces of butane, instead of just the one ounce that I did the math for you on. Expect a fireball and expansion about 3.17466 times as big, for every volume you put through it.

May I suggest that you go back and read what I posted above, as well as on this same post on ICM, and reflect on what it actually says?

If the significance escapes you, may I summarize it by saying it is dangerous beyond the point of foolhardy and insane.

PS: My first comment of NFW translates to, "no ( not ever) fuc*ing (sexual intercourse) way", if that is clearer.

Always blast outside

I once caught a 'friend' and (now EX!) roommate blasting in my garage... ON MY CHEST FREEZER. I'm glad I still have my house.

HE WAS USING AN ELECTRIC SKILLET FOR HIS POUR TRAY! FUCK!

I won't even buy BHO from someone I know is blasting in unsafe conditions. Couldn't have it on my conscience.

I'm a growing systems specialist, which means there are many skills I'm not an expert at in this industry. Hash oil making is something I'm more than happy to leave to professionals who have spent the money for proper closed loop equipment... and even then it isn't 100%; One of my buddies had his reclaim machine split open and spew butane oil solution all over him and the room. Fortunately it didn't pop- or he'd be dead. And I hate funerals for young people.

Do it outside!!!!!!!!!!!!!!!!

Yea do it outside...and don't run to many cans at once, try to keep the pool of butane to a minimum it will take longer but is safer, I use a 1oz glass tube and 1 can of tane per tube, I can make a oz of oil in less than a hour and that's making sure to wait a couple minutes before doin another blast to let the butane evaporate and disperse,

this has always yielded good results for me



This is 1 can

if you do that you're going to blow yourself and your house up. please study safety methods more before attempting to blast. not to be an asshole, but as someone who has blasted for a few years now all the time I can tell you that even the smallest mistake can lead to serious injury. (not just turning the area you're working in into a bomb, but exploding glass pipes can permanently blind you or cut you pretty damn bad.)

So you are going to fill a shed up with an explosive gas, then suck that out through an electric fan? I see that you havnt been online since you posted this I hope you didn't blow yourself up

MedicalMike420 said:

So you are going to fill a shed up with an explosive gas, then suck that out through an electric fan? I see that you havnt been online since you posted this I hope you didn't blow yourself up

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Whether he did or not, an increasing numbers of brothers are continuing to do so, suggesting that too often the good word that is getting out, is being ignored.

It ostensibly is either ignorance, disbelief, or sociopathy for someone to do so, especially with neighbors, wimmin, kids, and critters also present, or nearby.

How many of them would consider turning the gas burner on their stove top on, and leaving it running with out flame? Would they have no concerns that their house was filling with explosive natural gas?

We have the most sway over the ignorant, so need to continue to put out the good words, and some sway over the disbelievers, because obviously they are so incompetent on the subject as to be ignorant of the depth of their own incompetence, but sadly no sway on the sociopaths, whom are concerned only about themselves.