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Mushrooms, Mycology and Psychedelics > Mushroom Cultivation
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Shop: Sporeworks.EU Spores for European Microscopy   North Spore North Spore Mushroom Grow Kits & Cultivation Supplies

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Did I f*ck up already?? flowhood question
    #7211211 -

I bought this baby off ebay awhile back for a good price,

http://www.camfilfarr.com/cou_us/products/higheff/aeropac.cfm

My question is Is it to big it's 24x12x12 the tek i seen for a flowhood has the dimensions at24x12x5.8??


also what kind of blower will be sufficent??
I can post pics if need be thanks

Extras: Filter Print Post Top
Re: Did I f*ck up already?? flowhood question [Re: TomBrady12]
    #7211277 -

Good filter. Extend your plenum area to make up for the increased depth.
RR


--------------------
Download Let's Grow Mushrooms



semper in excretia sumus solim profundum variat

"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
Thomas Edison

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Re: Did I f*ck up already?? flowhood question [Re: TomBrady12]
    #7211290 -

Whats the static pressure of it ?


--------------------
:Awesketch:

:cool: Fair is Fair :devil:

Extras: Filter Print Post Top
Re: Did I f*ck up already?? flowhood question [Re: Brainiac]
    #7212213 -

I don't have a blower yet i was hoping someone could do the math for me and say buy this one lol this is the tek i found

http://www.psychedelic.com/building_a_professional_flowhood.htm


should I build it this way or get one from off of here thanks for the help already

Extras: Filter Print Post Top
Re: Did I f*ck up already?? flowhood question [Re: TomBrady12]
    #7212321 -

Email the compeny, asking about static pressure ?How much did you pay for this ?I went the easy way and got one thro Fungi.com.

Matching a blower to the filter
Once you decided on the size of the HEPA filter, you have to match a suitable blower to this particular filter. This is a very important step, so make sure to study the directions thoroughly.

Every filter has a "resistance" when air blows through it at a certain speed, this resistance is called the "static pressure".

Press your hand against your mouth. Now try to blow through it. Dependant on how firm you press it against your mouth, you will have some difficulties blowing air out and you will feel some resistance, this is the static pressure.

Every filter has a different static pressure at the working point. The working point is where the amount of the air flowing through the filter is sufficient to meet the requirement of the laminar flow.

The static pressure is expressed in inch of water column in the English units, a typical value would be 1", the SI unit for pressure is Pa(Pascal).

1" water column is around 250 Pa. Each filter has a data sheet (consult the manufacturer if this is not the case with your filter) where the static pressure at the working point is entered. Before the air enters the blower it is usually pre-filtered by a furnace filter around 1"(2.5cm) thick placed in front of the blower to protect it and the HEPA filter from big particles like dust and hairs. It can be assumed that the static pressure for this prefilter at the working point is around 0.2"(50 Pa)

According to Stamets (Paul Stamets and J.S.Chilton: The Mushroom Cultivator p. 347 ff) the air speed of the air flowing from the filter surface should be (at least) 100 feet per minute(fpm).(around 30 meter per minute or 0.5 meter per second). Determining the correct blower for a filter consists of several steps:

1. Find out the area of your filter by multiplying the width and the hight in feet (for instance the smallest reasonably usable filter would be 2ft x 1ft)

2ft x 1ft = 2 ft2
2. Multiply the required air speed(the one Stamets specifies, 100 ft/min) with the area of your filter

100 ft/min x 2 ft2 = 200 ft3/min
So 200 ft3/min(= cfm = "cubic feet per minute") is the amount of air your blower must deliver at the sum of the STATIC PRESSURE of the HEPA filter + prefilter.

NOTE: 1 cfm= 1.7m3/h

So if you use the above filter with 1"(250Pa) static pressure and a furnace prefilter with a static pressure of 0.2"(50Pa) your blower must deliver 200 cfm(340m3/h) of air at a static pressure of 1.2"(300Pa).

http://www.fungifun.org/English/Flowhood#match


--------------------
:Awesketch:

:cool: Fair is Fair :devil:

Extras: Filter Print Post Top
Re: Did I f*ck up already?? flowhood question [Re: Brainiac]
    #7212729 -

ok man thanks for helping info i got from the site i hope this helps

Dimensions 23.31 x 23.31 x 11.31

air flow capacity 2000 CFM

initial resistence (inches w.g) 0.65

Media Area (sq. ft) 105

link http://www.filterair.info/literature/Files/Aeropac%20High%20Efficiency%20ASHRAE%20Box%20Style%20Air%20Filter%20Product%20Sheet.pdf

Extras: Filter Print Post Top
Re: Did I f*ck up already?? flowhood question [Re: TomBrady12]
    #7214306 -

should I JUST GO WITH THE HYDROFARN 495CFM TO BE SAFE OR WILL THAT BE OVERKILL????

Extras: Filter Print Post Top
Re: Did I f*ck up already?? flowhood question [Re: TomBrady12]
    #7214576 -

Anything rated +/- 300 cfm @ 1" static pressure will work fine. You can use the 495 cfm motor, but I'd recommend getting a motor speed controller so you can slow it down a bit. Otherwise, you can block off part of the intake to reduce airflow.
RR


--------------------
Download Let's Grow Mushrooms



semper in excretia sumus solim profundum variat

"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
Thomas Edison

Extras: Filter Print Post Top
Re: Did I f*ck up already?? flowhood question [Re: RogerRabbit]
    #7214681 -

thanks man those videos are sweet BTW

Extras: Filter Print Post Top
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Mushrooms, Mycology and Psychedelics > Mushroom Cultivation
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