|
freshlocal
Stranger
Registered: 06/26/20
Posts: 2
Last seen: 3 years, 3 months
|
Flow Hood Question - fan speed for cleaning air in workroom?
#26818325 - 07/11/20 09:37 PM (3 years, 6 months ago) |
|
|
When building the flow hood, I bought a fan that is about twice as powerful as it needs to be [~790cfm]. When I use the flow hood for lab work, I cover half of the intake with cardboard and use the lighter test to check for laminar flow speed, no problems.
When bulk inoculating straw in the same room, I want to clean the air in there the best I can by running the flow hood ahead of time. Should I run it at full speed for this? Or continue to keep the intake half covered?
Will I wear out my HEPA filter quickly running at high speed? (am using prefilter)
|
SHROOMSISAY01
Mr. Shrooms



Registered: 01/22/17
Posts: 3,849
Loc: Virginia, USA
Last seen: 1 hour, 33 minutes
|
Re: Flow Hood Question - fan speed for cleaning air in workroom? [Re: freshlocal]
#26820307 - 07/12/20 11:50 PM (3 years, 6 months ago) |
|
|
You will not wear out your filter by running it full speed, but you may damage your filter. For that reason and because I know nothing about your filter. I would just run it half covered. If you blow out your filter you will be buying a new one.
|
Forrester
aspiring sociopath


Registered: 02/05/13
Posts: 9,351
Loc: Northeast USA
Last seen: 24 days, 18 hours
|
Re: Flow Hood Question - fan speed for cleaning air in workroom? [Re: SHROOMSISAY01]
#26821375 - 07/13/20 03:51 PM (3 years, 6 months ago) |
|
|
For what it's worth, I wouldn't inoculate straw in the same room I did my sterile work in, but maybe it's not an option for you.
Spawning to straw is generally done in open air, often outdoors, so I'm curious why you feel the need to scrub the air anyway?
-------------------- Repugnant is a creature who would squander the ability to lift an eye to heaven, conscious of his fleeting time here. ------------------- Have some medicinal mushrooms and want to get the most out of them? Try this double extraction method.
|
freshlocal
Stranger
Registered: 06/26/20
Posts: 2
Last seen: 3 years, 3 months
|
Re: Flow Hood Question - fan speed for cleaning air in workroom? [Re: Forrester]
#26822262 - 07/14/20 01:49 AM (3 years, 6 months ago) |
|
|
Thanks for the replies, much appreciated.
Quote:
SHROOMSISAY01 said: You will not wear out your filter by running it full speed, but you may damage your filter. For that reason and because I know nothing about your filter. I would just run it half covered. If you blow out your filter you will be buying a new one.
This is probably what I needed to hear. It's a 2'x 2'x 11" hepa, I'll look into the specs and see about some kind of max capacity. Sounds like it's not worth it. Hopefully I didn't do damage before realizing it was blowing too fast.
Quote:
Forrester said: For what it's worth, I wouldn't inoculate straw in the same room I did my sterile work in, but maybe it's not an option for you.
Spawning to straw is generally done in open air, often outdoors, so I'm curious why you feel the need to scrub the air anyway?
I'm planning a little oyster operation contained in a single-car garage, with the lab area/greenhouse on one side and an open work space on the other. No car inside but it has the house's washer/dryer.
So I figured my 'sterile' area is a shared space anyway and not isolated unless I hang poly sheeting around it. That makes me think I will be fighting a similar amount of contamination in my grain spawn and agar whether or not I work with the pasteurized straw inside the garage. If I can lower my contam rate on the straw logs by inoculating them inside a scrubbed air room, that seems worth it.
Chopping and pasteurizing the straw will be done outside - inside the room I would just be opening totes of pasteurized straw and filling holey buckets (trying to do no-waste).
|
SHROOMSISAY01
Mr. Shrooms



Registered: 01/22/17
Posts: 3,849
Loc: Virginia, USA
Last seen: 1 hour, 33 minutes
|
Re: Flow Hood Question - fan speed for cleaning air in workroom? [Re: freshlocal]
#26822553 - 07/14/20 09:00 AM (3 years, 6 months ago) |
|
|
|
junk_f00d



Registered: 12/04/15
Posts: 933
Last seen: 1 year, 2 months
|
Re: Flow Hood Question - fan speed for cleaning air in workroom? [Re: SHROOMSISAY01]
#26826936 - 07/16/20 12:45 PM (3 years, 6 months ago) |
|
|
It sounds like you're planning a lab, fruiting room and spawning area all in the same garage, right? If that's the case, I'd partition off the lab area with some 2x4s and plastic cloth. I'd do the same for the fruiting room. I'd keep my sterile area as clean as possible, and do my spawning to bulk outside of it, otherwise you're just making your lab dirty and running your hood a lot more than you have to.
I'm not sure what volume of straw you're pastuerizing, but if it's large amounts, I'd just spawn outside. I just do it in my backyard, next to my pastuerization barrel.
|
Forrester
aspiring sociopath


Registered: 02/05/13
Posts: 9,351
Loc: Northeast USA
Last seen: 24 days, 18 hours
|
Re: Flow Hood Question - fan speed for cleaning air in workroom? [Re: junk_f00d]
#26827365 - 07/16/20 04:29 PM (3 years, 6 months ago) |
|
|
Quote:
junk_f00d said: It sounds like you're planning a lab, fruiting room and spawning area all in the same garage, right? If that's the case, I'd partition off the lab area with some 2x4s and plastic cloth. I'd do the same for the fruiting room. I'd keep my sterile area as clean as possible, and do my spawning to bulk outside of it, otherwise you're just making your lab dirty and running your hood a lot more than you have to.
I'm not sure what volume of straw you're pastuerizing, but if it's large amounts, I'd just spawn outside. I just do it in my backyard, next to my pastuerization barrel.

Gotta agree, as long as you're pasteurizing the straw correctly there's absolutely no need to clean the air. Just do it outdoors if you can.
-------------------- Repugnant is a creature who would squander the ability to lift an eye to heaven, conscious of his fleeting time here. ------------------- Have some medicinal mushrooms and want to get the most out of them? Try this double extraction method.
|
|