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InvisibleHerbal_Elixer
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Clean Air Intake and Exhaust GH
    #11151650 - 09/29/09 04:31 PM (14 years, 4 months ago)

OK, so I was switching to a 4 tier set up, and during that time I also got into the idea of growing a quantity of oysters. I had planned on running multiple 4 tiers, etc. Then I was enlightened to the fact that oysters drop a huge amount of spores that can and have caused others respiratory problems. I said I had thought of a solution to this and here it is:



Basically, I found some HEPA face mask filters in bulk, 2 types. One is an MSA type H face mask (round) filter that has been tested by an independant researcher to maintain 99.998% effectiveness when exposed to 85% humdity in lab conditions for multiple days @ .3 microns. These are located 2 per shelf (opposite each other) on the sides of the 4 tier.




The other is also a HEPA face mask filter, these have a one way diaphragm, but are not so good with humidity. This design was perfect for adapting to the homemade 5 gallon humidifiers. Basically attached and sealed to the lid of the bucket. I know I said these were not so good in high humidity and this is a severely humid location for them. Solution: I created a positive pressure system with a large capacity aquarium air pump plumbed directly into the filter, which engages the diaphragm shut and also acts as the positive force for the vapor to travel through the line into the GH.




Next, I used a 4" marine exhaust fan fitted to the bottom of the GH. This also has attached the homemade exhaust filter, which is attached via a section of tyvek sleeve to a final output filter of the first type described, the sleeve is also loosely poly filled and prefiltered with a MERV 8 HVAC filter (you can see the trimmed edge of this sticking out on the fan side). The fan was rated at 240cfm, but static pressure has significantly dropped this. *Note I applied silicon to the wire outlet as a leak was found here.



The 4 tier was sealed at every point. At each filter, accessory outlet, bottom, and zippered door. The bottom is sealed all the way around until it reaches each side of the opening for the door (directly to the outer portion of the zipper). I made the lower housing out of solid wood that was measured and cut to fit snugly around the perimeter of the GH. It was also double lined with 4 mil plastic sheeting, the GH walls were sealed to this liner. Then the door itself is sealed against a piece of weatherstripping and is sandwiched down to it using a piece of angled trim wood. This is attached to the lower housing by two studs into the housing and has to hand tightened bolts to form the seal at the door. Another issue was two slight openings at the bottom of each zipper, here I stuffed these openings with poly fill.



First, does it seal?
Well, when the exhaust fan kicks on (as shown in the above picture), the sides of the GH and the plastic liner all suck inward. You can see the curve in the door and the lower sheeting pulling in, in that pic. I then used incense to follow around every seal and filter. No seals leak at all (including at the poly fill plugs at the zipper.

Second, is there enough FAE?
The idea behind the bucket filter with the diaphragm is that this will open during the exhaust cycle. It does just that, you can see the vapor flow quadruple during exhaust operation. Another sign was a 15% drop in humidity during operation (Keep in mind, the vapor flow highly increases, yet the RH does dramatically drop). Also, a slight transfer takes place at each side filter (again using the incense test to see the flow). I am confident a complete or close to complete transfer takes place. I have had it cycling for the past 24 hours. It exhausts 4 times per day for 15 minutes. It starts at 95% RH and drops to 80% RH after exhaust operation (measured at the middle). It then takes about an hour to one and a half hours to recover the RH. For oysters this will be fine, my other "tropical" species will be located on the top shelf, it is both warmer (75 f versus 71 f at the bottom) and they will receive the direct blast of increased vapor during the exhaust cycle. The only question remaining is are the cycles right.

Third, the lighting.
A 24" 100% waterproof outdoor, sealed florescent light unit was located within the roof of the GH. It is currently using a standard bulb, but the correct spectrum is on order.



Hopefully, this will grow and filter well. We will see.


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Edited by Herbal_Elixer (10/05/09 12:00 PM)


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OfflineGroomies
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Re: Clean Air Intake and Exhaust GH - "The Spore Catcher" [Re: Herbal_Elixer]
    #11151693 - 09/29/09 04:40 PM (14 years, 4 months ago)

:congrats:well done


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:hotidea::hotidea::hotidea:


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InvisibleHerbal_Elixer
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Re: Clean Air Intake and Exhaust GH - "The Spore Catcher" [Re: Groomies]
    #11152027 - 09/29/09 05:34 PM (14 years, 4 months ago)

Thanks man


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InvisibleHerbal_Elixer
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Re: Clean Air Intake and Exhaust GH - "The Spore Catcher" [Re: Herbal_Elixer]
    #11152564 - 09/29/09 06:58 PM (14 years, 4 months ago)

If anyone cares, the bulb going in is a Spectramax 6500K

"The Spectramax lamp combines 6500K trichromatic phosphors with actinic 03 blue to create a full-spectrum lamp that enhances color and clarity while providing aquarium inhabitants with the proper light required for essential biochemical functions. The actinc 03 blue light in combination with the trichromatic phosphors bathes the aquarium in a soft blue-white light, enhancing the vibrant colors of exotic fish and providing essential light for photosynthesis."


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OfflineMastermind729
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Re: Clean Air Intake and Exhaust GH - "The Spore Catcher" [Re: Herbal_Elixer]
    #11171996 - 10/02/09 09:17 PM (14 years, 4 months ago)

:eek:  Ooooo purdy


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OfflineGlassApex
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Re: Clean Air Intake and Exhaust GH - "The Spore Catcher" [Re: Mastermind729]
    #11172057 - 10/02/09 09:30 PM (14 years, 4 months ago)

Very cool!


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InvisibleHerbal_Elixer
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Re: Clean Air Intake and Exhaust GH - "The Spore Catcher" [Re: GlassApex]
    #11172138 - 10/02/09 09:49 PM (14 years, 4 months ago)

Oh.. hey.. thanks

I just switched the air pump out today for a bigger one.. Humidity stays at 99.. only drops to 97 during exhaust and recovers within 20 minutes.. so more exhaust cycles are being programed .. make sure I have FAE.


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Invisibleratdog
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Re: Clean Air Intake and Exhaust GH - "The Spore Catcher" [Re: Herbal_Elixer]
    #11172168 - 10/02/09 09:56 PM (14 years, 4 months ago)

nice man


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some people just don't get it:spank:
http://www.shroomery.org/forums/showflat.php/Number/11241796
so here is a video or two or three for you guys:rolleyes:


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InvisibleHerbal_Elixer
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Re: Clean Air Intake and Exhaust GH - "The Spore Catcher" [Re: ratdog]
    #11186535 - 10/05/09 12:02 PM (14 years, 4 months ago)

Damn it.. the Pyramid power supply just fried on just one fan!! Guess it's better to know now, I still have some time before my poly logs colonize.. Just ordered a 30 amp. The fans are rated at 5 amps, but are running just a little hotter due to static pressure... but only for 15 minutes at a time.


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InvisibleHerbal_Elixer
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Re: Clean Air Intake and Exhaust GH - "The Spore Catcher" [Re: Herbal_Elixer]
    #11231965 - 10/12/09 09:17 AM (14 years, 4 months ago)

Ok.. time to find out how things operate under working conditions, with some FAE loving Pleurotus Ostreatus :smile:  Wish me luck!



Also.. Replaced the power supply with this new, dual cooling fanned, 30amp unit (and it lights up all pretty). I also added an ambient fan with dual heads, one aimed at the electrical for cooling and both providing ambient air movement. The air pump was also replaced with a higher output unit (2.6 lph). I also upped the exhaust cycles to 6 times per day.



If all goes well.. the second GH will follow suit and I should have my shroom factory up and running.



(*Still waiting on the 6500k's)


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Edited by Herbal_Elixer (10/12/09 09:18 AM)


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OfflineRogerRabbitM
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Re: Clean Air Intake and Exhaust GH [Re: Herbal_Elixer]
    #11232159 - 10/12/09 10:09 AM (14 years, 4 months ago)

Quote:

Herbal_Elixer said:

I am confident a complete or close to complete transfer takes place. I have had it cycling for the past 24 hours. It exhausts 4 times per day for 15 minutes.




Bear in mind, for oysters, you want at least four complete air exchanges per hour, not day.  Oyster mushrooms are extremely CO2 intolerant. I've seen the CO2 level in my mini-greenhouses go from 500 ppm to 1500 ppm in half an hour. 

In addition, you'll find oysters grown at room temp will be very thin and have little weight.  They really want a temp of around 50F to 60F for best results.
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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InvisibleHerbal_Elixer
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Re: Clean Air Intake and Exhaust GH [Re: RogerRabbit]
    #11232202 - 10/12/09 10:19 AM (14 years, 4 months ago)

Yeah.. the temp thing bothers me.. 72-74 in the GH is the best I can do.. 90 outside still. I also thought about leaving the zippers open until the clusters form.. or around that point.. not sure. Doing what I can with my environment. I will have some Enoki and Lions Mane in there soon as well.. maybe those will do better.

Thanks for the input!

And thanks for sharing your readings for CO2.. I wanted to get a figure, but can't afford a meter.. thanks again.


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Edited by Herbal_Elixer (10/12/09 10:20 AM)


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InvisibleHerbal_Elixer
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Re: Clean Air Intake and Exhaust GH [Re: Herbal_Elixer]
    #11232214 - 10/12/09 10:22 AM (14 years, 4 months ago)

I think I will go ahead and add a few more exhaust cycles.. my humidity recovers so damn quick in there.. and FAE is more important in this scenario. But I think the most I can add, is one exchange every two hours..


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OfflineRogerRabbitM
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Re: Clean Air Intake and Exhaust GH [Re: Herbal_Elixer]
    #11232377 - 10/12/09 10:56 AM (14 years, 4 months ago)

Quote:

Herbal_Elixer said:

And thanks for sharing your readings for CO2.. I wanted to get a figure, but can't afford a meter.. thanks again.




This CO2 meter is reasonably priced and has a set of contacts that can be used to operate an exhaust fan based on CO2 levels.  You can control the CO2 level you want to operate the exhaust fan.
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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InvisibleHerbal_Elixer
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Re: Clean Air Intake and Exhaust GH [Re: RogerRabbit]
    #11232439 - 10/12/09 11:06 AM (14 years, 4 months ago)

cool.. but not anytime soon (strapped for $).. maybe I will throw in some humidity loving plants to eat it in the mean time.. lol. If only that would work.. hopefully towards the end of this month the outdoor temps will start to drop.. maybe this flush will suffer, but they can go outdoors later.

This GH is still going to work pretty good for other varieties (it has for a few test grows so far).. Oysters may have been a stretch however.. Hopefully a process will develop for me.. like I said, maybe do oysters in the few months of winter here outdoors.. and do something else indoors year around. I have a few other edibles to experiment with. 


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Edited by Herbal_Elixer (10/12/09 11:11 AM)


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OfflineRogerRabbitM
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Re: Clean Air Intake and Exhaust GH [Re: Herbal_Elixer]
    #11232562 - 10/12/09 11:27 AM (14 years, 4 months ago)

Quote:

Herbal_Elixer said:
90 outside still.




Jeezus!  It's been below zero here the last few mornings.  Expecting a foot of snow tonight and tomorrow.
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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InvisibleHerbal_Elixer
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Re: Clean Air Intake and Exhaust GH [Re: RogerRabbit]
    #11232582 - 10/12/09 11:30 AM (14 years, 4 months ago)

lol.. yeah.. I miss seasons. Spent 9 years in Alaska.. no issues with cool temps there either :smile:
In the "dead of winter" here where I am now.. it can get to a low of 40 and a high of 70 for a couple months.. up to 4 months sometimes.. that may be my best bet.


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Edited by Herbal_Elixer (10/12/09 11:31 AM)


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InvisibleHerbal_Elixer
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Re: Clean Air Intake and Exhaust GH [Re: Herbal_Elixer]
    #11232588 - 10/12/09 11:32 AM (14 years, 4 months ago)

I do have some oysters spawing a small outdoor bed right now.. I will see how it does (if it survives the bugs)


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