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Offlinepaddo
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want to construct a HEPA flowhood *UPDATE*
    #798916 - 08/05/02 10:07 PM (21 years, 10 months ago)

Could anybody give me some good tips on this....


Thanks in advance,

Paddo

------------------------------------------------
09/02/2002
Finished the flowhood...thanks to all of you guys who helped me out!






Paddo

Edited by paddo (09/02/02 04:40 AM)

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OfflineAnnoA
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Re: want to construct a HEPA flowhood [Re: paddo]
    #798947 - 08/05/02 11:09 PM (21 years, 10 months ago)

There is a whole section on it in TMC.

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InvisibleCLuB99
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Re: want to construct a HEPA flowhood [Re: paddo]
    #798968 - 08/05/02 11:49 PM (21 years, 10 months ago)

good tips?? please explain yourself better....do you need plans, sources for filters and blowers? what?

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Invisibleangryshroom
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Re: want to construct a HEPA flowhood [Re: CLuB99]
    #799487 - 08/06/02 07:07 AM (21 years, 10 months ago)

I like this Flowhood "tek":

http://www.mycotopia.net/teks/flowhood.html

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InvisibleCLuB99
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Re: want to construct a HEPA flowhood [Re: angryshroom]
    #799511 - 08/06/02 07:19 AM (21 years, 10 months ago)

my flow hood is the same of the link....a 24x12, but....i'm having space problems when working with bags or big jars....
best is a 24x18 hood...enough room to do all your myco job...

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Offlinepaddo
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Re: want to construct a HEPA flowhood [Re: Anno]
    #799708 - 08/06/02 09:12 AM (21 years, 10 months ago)

Are you refering to page 347 to 352 of TMC ,Anno?
If so , this is some great info yes.....but i need more...like some drawings or sommeting or some good pics of some homemade flowhoods...

Do you have one Anno?


Paddo



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Offlinepaddo
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Re: want to construct a HEPA flowhood [Re: CLuB99]
    #799713 - 08/06/02 09:14 AM (21 years, 10 months ago)

Hi,

Do you have some pics of it?
Did you constructed your self?

Thanks in advance,

Paddo

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InvisibleCLuB99
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Re: want to construct a HEPA flowhood [Re: paddo]
    #800085 - 08/06/02 12:26 PM (21 years, 10 months ago)

yes..here we go...




yes i built it...

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InvisibleCLuB99
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Re: want to construct a HEPA flowhood [Re: paddo]
    #800093 - 08/06/02 12:30 PM (21 years, 10 months ago)

how you can see, isn't exactly a beauty thing....but works really good, i count only 2 contaminations on agar since i built it (6 months) , and both not for a faulth of the hood , but of the grower

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Offlinepaddo
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Re: want to construct a HEPA flowhood [Re: CLuB99]
    #800114 - 08/06/02 12:38 PM (21 years, 10 months ago)

wow man looking good!!!
Thanks for posting that!

So what where the total costs if i may ask?



Paddo

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OfflineAnnoA
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Re: want to construct a HEPA flowhood [Re: paddo]
    #800986 - 08/06/02 07:48 PM (21 years, 10 months ago)

This is mine:
http://fungifun.50megs.com/hepa_new/

The cost:
FIlter: 99.997% efficiency, 610x305 mm 70 euro
Blower: 300 cubic meter per hour at 300 Pa : 130 euro
Wood and other thingies: 30 Euro

Sum: 230 euro + 3 hours of work

Edited by Anno (08/06/02 07:53 PM)

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Offlinemelonhead
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Re: want to construct a HEPA flowhood [Re: CLuB99]
    #801767 - 08/07/02 06:20 AM (21 years, 10 months ago)

hello great job how many cfm

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Offlinepaddo
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Re: want to construct a HEPA flowhood [Re: Anno]
    #802270 - 08/07/02 10:31 AM (21 years, 10 months ago)

Anno,
that is looking very nice, and looks easy to build.

The hole at the back ,is this where you mounted the blower?

And what is resting at the back of the hole? a prefilter?
what kind of prefilter did u use?



And excuse my ignorance , but what does 300PA stands for?


thanks,
Paddo

Edited by paddo (08/07/02 10:40 AM)

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OfflineAnnoA
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Re: want to construct a HEPA flowhood [Re: paddo]
    #802510 - 08/07/02 12:29 PM (21 years, 10 months ago)

>The hole at the back ,is this where you mounted the blower?
I use a axial duct blower which is conected to this hole using a tube.

>And what is resting at the back of the hole? a prefilter?
Yes,

>what kind of prefilter did u use?
a simple furnace filter.

> what does 300PA stands for?

300Pa means 300 Pascal.
100 000 Pa = 1 bar , it?s a pressure unit.

The filter has a resistance which represents itself as a pressure drop at the filter, the so called static pressure.

most HEPAS have a static pressure of 250Pa, and the prefilter is assumed to have 50Pa.

This means that the blower must be able to deliver the required amount of air against this combined static pressure of 300Pa.

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Offlinepaddo
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Re: want to construct a HEPA flowhood [Re: Anno]
    #803449 - 08/07/02 08:25 PM (21 years, 10 months ago)

Ok thanks!
If you could just help me out with this one :

I just orderd this Hepa filter :

HPA-44 610x457x68 .
capacity m3/h frontspeed at 0,45 m/s : 400
Would this be good one?

This one the salesman put in backorder for me because he didnt had it on stock.


But he did had this one in stock:

HPA-43 305x610x68.
capacity m3/h frontspeed at 0,45 m/s : 300

Could i use this one in the same construction as u made?

thanks again,
Paddo.

Edited by paddo (08/07/02 08:31 PM)

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OfflineAnnoA
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Re: want to construct a HEPA flowhood [Re: paddo]
    #803492 - 08/07/02 09:02 PM (21 years, 10 months ago)

I would go with the first one.
I have a setup with the smaller one, but I would be more happier with the first one since it?s 15 cm higher.

How much is it?


>HPA-44 610x457x68 .
>capacity m3/h frontspeed at 0,45 m/s : 400

>HPA-43 305x610x68.
>capacity m3/h frontspeed at 0,45 m/s : 300

Hmm, these data don?t seem quite right. According to Stamets, if you want 100 ft/min (0,50 m/s)frontspeed, then you need a blower with 417 m3/h for the bigger and 260 m^3/h for the smaller blower, if you make the calculation with the efective are, taking into acount that there is a 2.5 cm border at each side of the filter.
Did you also find out the statical pressure of the filters?

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Offlinepaddo
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Re: want to construct a HEPA flowhood [Re: Anno]
    #803550 - 08/07/02 09:50 PM (21 years, 10 months ago)

>How much is it?
95 Euro for the big one
75 Euro for the smaller one


>Did you also find out the statical pressure of the filters?
125 Pa for both

On this page you have the tech specs. :
http://www.acsfilters.com/english/airfilters/hepas.html

Edited by paddo (08/07/02 09:52 PM)

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Offlinezeronio
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Re: want to construct a HEPA flowhood [Re: Anno]
    #803626 - 08/07/02 11:01 PM (21 years, 10 months ago)

Where did you buy this HEPA and blower?

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OfflineAnnoA
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Re: want to construct a HEPA flowhood [Re: zeronio]
    #803682 - 08/08/02 12:17 AM (21 years, 10 months ago)

The hepa at
www.czech.at

the blower at
www.psychonaut.at

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Offlinepaddo
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Re: want to construct a HEPA flowhood [Re: Anno]
    #806986 - 08/09/02 10:29 AM (21 years, 10 months ago)

Could somebody convert this for me to metric measurements :
495 cfm .8" static pressure

When i try to convert it on my calculator i'm keeping getting 14.02 M3 p/m
this doesnt seem right to me.

hope anybody can help me.

Thanks,

Paddo


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