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hepa filter ? sizes, links


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#21 Guest_pcsillypj_*

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Posted 12 October 2005 - 12:33 PM

hmm....well that even better news
for me RR...means it wont cost me
as much...hehehe.....well i'm off to
ebay to purchase my blower....and
to control the airflow i figured i would
just put a dimmer switch to control the
speed of the airflow on the flowhood...
:grin:

#22 Guest_freakachino_*

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Posted 12 October 2005 - 01:05 PM

Thanks Rodger! I was hoping you'd say that!!! :)

When you say bend the flame without blowing it out, should it be bent perpendicular say 90 degree angle and hold with the flow, or should the flame just bend and not flicker? I've seen those pix with the candle etc. but that is a still pic. The flow should be pushing it steady without flicker I'm assuming?
I'm really thankful for your knowledge on the laminar flow hoods Rodger.

#23 spacecowboy

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Posted 29 March 2006 - 10:38 AM

Hope to buy a new HEPA filter soon, which efficiency is better?

Seems to me that there is no big difference, except price wise, but I am not an expert in filters. I already have a hood just need to replace the filter. Plan on using it mainly for bagging plug spawn and agar plate tissue culturing.

#24 Guest_freakachino_*

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Posted 29 March 2006 - 10:46 AM

Mine is 99.97 and I haven't had issues with contams thankfully.

The 99.99 is probably best of course, but more expensive. Also, I use prefilters so if a prefilter is used, then I'd think the 99.97 is just as fine for our purposes. Though I'm no hepa expert, just sharing what I use and works for me.

#25 python

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Posted 29 March 2006 - 11:10 AM

99.99............however filters designed forcommercial use/mushroom growing specifically are much better and usually have some metal in them and many layers.......... Hepa's in the store are essentially paper...........

IMO the difference in the .97 and .99 is relatively large as that .02 can essentially let millions of spores/contaminants through.........

But on the same note there are people who rarely get contams and never use a hepa filter..........

the decision is really up to you

#26 Guest_freakachino_*

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Posted 29 March 2006 - 11:19 AM

I think sometimes, our fungal purposes are like us. Don't allow them to fight anything doesn't build them stronger. If we as humans take antibiotics constantly etc. Then our bodies can't fight baddies off.

So, yes, the 99.99 takes out that last .02 of contaminate spores. But does it require it? Find the minimum threshold to success is my outlook. I am probably way off base though, lol.

Just my crazy ramblings :crazy1: I shouldn't post while :rasta:


So, yeah if you are aiming for best, then 99.99, but just saying I have fine with 99.97.

Python is right too, a true hepa for laminar flow hood has metal and many layers. Not your average home air cleaner hepa.

#27 the_chosen_one

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Posted 01 April 2006 - 04:56 PM

The only real noticeable difference will be the fact that you will have to replace the 99.99 that much sooner. A 99.97 HEPA will eventually work it's way up to 99.99 with use. Air filters of any kind improve in effeciency with use. Higher eff also puts more load on the blower motor as well. Keep in mind that 100% eff. is 0 filtration of any kind. No air flow. :flamer:

Damn speaking of ....I left mine running!

#28 spacecowboy

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Posted 03 April 2006 - 02:29 PM

Just placed an order for a 99.99% eff. 24x24x5-7/8 HEPA with a particle board frame. It will cost a little over 200 USD after taxes. I did not order it online, so I may have been able to get it cheaper. But I feel more comfortable going through the local heating and cooling supply store.

Thx for the help all :)

#29 the_chosen_one

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Posted 04 April 2006 - 12:58 PM

Cool!!!:headbang: Your'e gonna love it!!!

#30 freestar

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Posted 16 May 2008 - 06:12 PM

:headbang:i ran into a couple filters pretty cheap.i was wondering if they will work for a flowhood?:headbang:

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#31 CoyoteMesc

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Posted 16 May 2008 - 06:13 PM

Im not sure.

I have been told to look for 99.999:eusa_thin

#32 the_chosen_one

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Posted 16 May 2008 - 06:16 PM

Im not sure.

I have been told to look for 99.999:eusa_thin


;)

99.97 is ok. eventually it will become 99.999 with use. the efficiency actually goes up as the filter plugs up with particles.

still go with the 99.999 if you can.

#33 CoyoteMesc

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Posted 16 May 2008 - 06:22 PM

aw cool, learn something new everyday !

#34 freestar

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Posted 16 May 2008 - 06:25 PM

if i use this filter i wont get cotams til it gets to 99.9 will i?

#35 the_chosen_one

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Posted 16 May 2008 - 06:39 PM

well, you can get contams with any hepa. it helps a lot to have it in a small room, or a clean room set up like mine.

efficiency is decieving.. it's more the micron rating that counts. unfortunatley i am no where near mine to see what it is lol... and i can't remember at the moment.

i'll check it when i get home, but i know there is info here somewhere. i'll try and find that too. ;)

#36 the_chosen_one

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Posted 16 May 2008 - 06:43 PM

http://mycotopia.net...epa-merged.html

here's one link. RR had posted micron ratings somewhere though. i'll find it yet :D

#37 the_chosen_one

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Posted 16 May 2008 - 06:53 PM

http://www.wisegeek....hepa-filter.htm

http://www.hepafilte...ter_Ratings.php

http://www.cleanweb....ips/okTip1.html

a few helpful links ;)

hmm. i think mine is .2 or .1

#38 freestar

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Posted 16 May 2008 - 07:00 PM

thanks tco for all the help:bow:.im not sure when im going to get to building this but i will update this when i do.

#39 CoyoteMesc

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Posted 16 May 2008 - 07:03 PM

Good luck sm

#40 the_chosen_one

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Posted 16 May 2008 - 07:26 PM

thanks tco for all the help:bow:.im not sure when im going to get to building this but i will update this when i do.


no problem :D i've had some experience with filtration through my work.. but mycology set ups are just a little different. i've found the clean room systems to be far superior.

http://mycotopia.net...clean-room.html


i merged the threads to help keep the info consolidated. :heart:




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