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Re: Fan specs for humidifier in Martha set-up [Re: Groovy Hobbit]
    #25574079 -

Solipsis said:
. . . to calculate static pressure you need to have a good idea of the resistance of the material that is producing this static pressure. For some filters I think it is a known specification when you are building a flowhood, but for situations where you have some very specific setup producing the resistance I think it can be very hard to calculate on paper and it would have to happen experimentally?


It is not hard there are static pressure calculators online for duct work when putting in a furnace but I don't think they go down to 2" also called a friction calculator.

Here is an example of what I use...

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Re: Fan specs for humidifier in Martha set-up [Re: SHROOMSISAY01]
    #25574111 -

Since you got the fan for free I would just use it with the rheostat. And dial it in. You will obviously need to use 4" duct with that fan and a 6 to 4 adapter and with 4" duct you don't have to worry about SP. The only thing you have to worry about is not being able to slow the fan down enough. So do a test run. Like I said all you need is a 5-gallon bucket and a cheap float valve. You will also need an ice maker install kit.

https://www.ebay.com/itm/Float-Water-Shut-Off-Valve-Automatic-Fill-Tank-Leveler-RO-DI-Aquarium-Fish-Tank/222756753550?hash=item33dd56508e:g:Ba8AAOSwAata0YoU:rk:1:pf:0

https://www.lowes.com/pd/EASTMAN-25-ft-L-1-4-in-O-D-Inlet-x-1-4-in-O-D-Outlet-Polyethylene-Ice-Maker-Connector/3196985

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Re: Fan specs for humidifier in Martha set-up [Re: SHROOMSISAY01]
    #25574162 -

I just looked at your fan it is ac 115v. I think if you use a rheostat you will burn up the motor. That fan is expensive and is not meant for the speed to be varied. DC is different and can be varied easily. If I am not mistaken AC would need separate windings in the motor. I would check into it b4 you potentially burn up the fan.

A better option would be to block the intake air on the fan.

Edited by SHROOMSISAY01 (10/28/18 02:56 PM)

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Re: Fan specs for humidifier in Martha set-up [Re: SHROOMSISAY01]
    #25574275 -

SHROOMSISAY01 said:
. . . use 4" duct with that fan and a 6 to 4 adapter and with 4" duct you don't have to worry about SP.


Right on.

SHROOMSISAY01 said:
all you need is a 5-gallon bucket and a cheap float valve. You will also need an ice maker install kit.


I wanted to ask you about that. I don't have plumbing up where my at-home humidity tent will be. I plan to refill the reservoir manually. Why would I need a float valve?

SHROOMSISAY01 said:
I just looked at your fan it is ac 115v. I think if you use a rheostat you will burn up the motor. That fan is expensive and is not meant for the speed to be varied. DC is different and can be varied easily. If I am not mistaken AC would need separate windings in the motor. I would check into it b4 you potentially burn up the fan.

A better option would be to block the intake air on the fan.


Another great heads-up. Thanks for these insights, SHROOMSISAY01. I'll be bouncing this one off an electrician I know . . . You're probably right about the better course.

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Re: Fan specs for humidifier in Martha set-up [Re: Groovy Hobbit]
    #25574913 -

You don't need a fill valve if you don't have plumbing. but you might want to think about a drain valve so you can clean that thing out. and make sure to have plenty of air stones or your water will get slimy and go bad. If the water goes bad you may have to use a powerhead to keep it fresher longer.

If you decide to put a drain valve on it I would not buy a bulkhead to go through your barrel make your own from PVC bulkheads are expensive. You can make a drain for a few dollars and you will be glad you did. Every time I clean out my 55-gallon steamer I thank God I put a drain valve on it.

Edited by SHROOMSISAY01 (10/28/18 08:59 PM)

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Re: Fan specs for humidifier in Martha set-up [Re: SHROOMSISAY01]
    #25577472 -

SHROOMSISAY01 said:
. . .You can make a drain for a few dollars and you will be glad you did. Every time I clean out my 55-gallon steamer I thank God I put a drain valve on it.


Definitely! I'm psyched to have all this forethought, SHROOMSISAY01. I'll let you all know and see what I come up with . . .

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Re: Fan specs for humidifier in Martha set-up [Re: Groovy Hobbit]
    #25577657 -

SHROOMSISAY01 said:
I have never had that problem because I always get a higher amp than I think I will need. Not only for that reason. But just in case I need to run something else off the same supply. If you only get the amps that you need you can not run anything else on the same supply. For example, if the fan needs 3 amps at 12 volts and I have a pump that needs 2 amps on 12 volts and I only have a 3 amp power supply. I would need another power supply. But if I bought a 5 amp power supply I can run them both from the same power supply. Or just one of them. The amps can be higher but cannot be lower.


Yea this is a good idea. The power supplies I have are just a bunch of spares I have laying around. The 12v 3.5 amps one was actually running 2 computer fans originally. I didn't expect the bilge blower to need more then 3.5 amps to start.

SHROOMSISAY01 said:
But in all honesty, the power supply should only put out what it says it is supposed to put out and the device should only draw what it is rated to draw. I would think if it does not there is something wrong with the device or something wrong with the person's test.


Yes, this is also what I thought too. But my multi-meter suggested otherwise. If allowed to pull more amps some models will, as testing with a multi-meter will tax it with the meters max possible, some transformers will pull more then they're rated for. Same thing with volts, they can fluctuate lower or higher then what it's rated for. Actually when I was doing a separate unrelated project, building a small LED array, reading about wall transformers to use as a power supply, some people were suggesting that not all of the wall transformer are made equal and can have these fluctuations, so they suggested to use dedicated LED drivers.

SHROOMSISAY01 said:
You have to realize some power supplies have pots that can be adjusted to change the voltage. And if the pots have been messed with or are just not right the device will not run properly.


Some of the ones I tested do have a switchable voltage, but others don't have this function, they're all pretty cheap models. Some were pretty stable with regards to the readings vs the ratings, others weren't. I do have a fairly expensive meanwell power supply that has a pot to adjust the voltage, it's a pretty stable power supply.

Groovy Hobbit, as SHROOMSISSAY01 said about that fan, you might have a problem getting it to run slow. When I was playing around with a disc fogger if you have the fan speed to high, it sort of just dissipates the mist before it gets a chance to go anywhere. The small home ultrasonic humidifiers use those small squirrel cage blowers you posted earlier and they only put out supposedly 2-32 cfm. I've been able to use one of those and push the mist up about 5-6 feet of flexible ducting.

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Re: Fan specs for humidifier in Martha set-up [Re: Groovy Hobbit]
    #25577671 -

Here is what you need for the drain. the elbow will help get as much water as possible out of the barrel but you wont get it all out obviously.

https://www.homedepot.com/p/Charlotte-Pipe-1-2-in-PVC-Sch-40-Female-S-x-FPT-Adapter-PVC021010600HD/203811406

https://www.homedepot.com/p/Charlotte-Pipe-1-2-in-PVC-Sch-40-Male-MPT-x-S-Adapter-PVC021090600HD/203811636

https://www.homedepot.com/p/DURA-1-2-in-Schedule-40-PVC-90-Degree-Elbow-C406-005/100344810

https://www.homedepot.com/p/DANCO-1-2-in-Rubber-Washers-2-Pack-10401/202832511

https://www.homedepot.com/p/Homewerks-Worldwide-3-4-in-PVC-Sch-40-Slip-x-Slip-Ball-Valve-VBVP40E4B/202370032?MERCH=REC-_-PIPHorizontal2_rr-_-202370031-_-202370032-_-N

You probably know how to do this already but just in case you don't this is the easiest and cheapest way to go through a barrel...


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Re: Fan specs for humidifier in Martha set-up [Re: DigitalRhizae]
    #25577757 -

Quote:
Groovy Hobbit said:
as SHROOMSISSAY01 said about that fan, you might have a problem getting it to run slow. When I was playing around with a disc fogger if you have the fan speed to high, it sort of just dissipates the mist before it gets a chance to go anywhere. The small home ultrasonic humidifiers use those small squirrel cage blowers you posted earlier and they only put out supposedly 2-32 cfm. I've been able to use one of those and push the mist up about 5-6 feet of flexible ducting.


I was going to mention that to high of a fan speed would cause a less dense fog. I figured that should be obvious though. That is one of the reasons I said you will probably need 2 mist makers.

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Re: Fan specs for humidifier in Martha set-up [Re: SHROOMSISAY01]
    #25580562 -

Good discussion here. That fan looks pretty awesome. Make sure you have 1 intake and 1 exhaust going 24/7 if you plan on fruiting oysters or Lions Mane. Check out my GreenHouse Build to see the problems I encountered and how I dealt with them. I used 6' Hurricaine fans, but I must say after the company changed hands the quality dropped. I would recommend if you are using a humidibuket with pond foggers on floats - get a large britta filter and run your tap through there first before filling the humidibucket. It'll add longevity to your fans and foggers.


--------------------





Indoor Greenhouse Build 
          Mid Size Mushroom Farm

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Re: Fan specs for humidifier in Martha set-up [Re: TravelAgency]
    #25580614 -

TravelAgency said:
Good discussion here. That fan looks pretty awesome. Make sure you have 1 intake and 1 exhaust going 24/7 if you plan on fruiting oysters or Lions Mane. Check out my GreenHouse Build to see the problems I encountered and how I dealt with them. I used 6' Hurricaine fans, but I must say after the company changed hands the quality dropped. I would recommend if you are using a humidibuket with pond foggers on floats - get a large britta filter and run your tap through there first before filling the humidibucket. It'll add longevity to your fans and foggers.


I hope you are talking about the fan for the humidity barrel when you say intake fan or that fogger is going to have a hard time running with a separate intake fan going also. A passive intake is much better in my opinion.

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Re: Fan specs for humidifier in Martha set-up [Re: SHROOMSISAY01]
    #25580660 -

I didn't find passive intake to be adequate. Here's a pretty simple Humidibucket Build that I used as a baseline - so the intake fan pushes air through the humid buicket and up into the FC - preferably in through the top so the air will push down over the fruits, taking the C02 and sporeload down with it towards the exhaust fan along the bottom of the FC. You can definitely get by with less, but if you are going to go through the effort of building a decent FC you might as well make it as effective as you are able.

Once I got everything dialed in:




While I was still figuring everything out:


While that last cluster is definitely pretty, you can see the difference in the shingling of the caps - the stems are elongated and the caps have had to leave gaps between them in order to breathe properly - which affects both yield and texture. The more stemmy, the more tough and chewy they will be, as well as waste energy searching for the best climate for them to form in instead of providing it to them from the get go.

Here's the difference from my former farm's walk in FC:


then a bit  better:


Then pretty much as good as I got it in that FC:


--------------------





Indoor Greenhouse Build 
          Mid Size Mushroom Farm

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Re: Fan specs for humidifier in Martha set-up [Re: TravelAgency]
    #25580664 -

I also had both fans on dimmer switches - the exhaust almost on full - and the intake tailored to keep the GH at just slightly negative pressure.


--------------------





Indoor Greenhouse Build 
          Mid Size Mushroom Farm

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Re: Fan specs for humidifier in Martha set-up [Re: TravelAgency]
    #25582046 -

TravelAgency said:
I didn't find passive intake to be adequate. Here's a pretty simple Humidibucket Build that I used as a baseline - so the intake fan pushes air through the humid buicket and up into the FC - preferably in through the top so the air will push down over the fruits, taking the C02 and sporeload down with it towards the exhaust fan along the bottom of the FC. You can definitely get by with less, but if you are going to go through the effort of building a decent FC you might as well make it as effective as you are able.

Once I got everything dialed in:




While I was still figuring everything out:


While that last cluster is definitely pretty, you can see the difference in the shingling of the caps - the stems are elongated and the caps have had to leave gaps between them in order to breathe properly - which affects both yield and texture. The more stemmy, the more tough and chewy they will be, as well as waste energy searching for the best climate for them to form in instead of providing it to them from the get go.

Here's the difference from my former farm's walk in FC:


then a bit  better:


Then pretty much as good as I got it in that FC:



I agree 100% with this. Nice build!! The only thing I had different is a fishtank float valve so I didn't have to fill it. I hooked it up to reverse osmosis. I already had the RO. I won't drink bottled or tap water it is full of fluoride poison. I also used pvc to hard pipe it into my Martha to keep from slowing down the air. I angled the pipe slightly to allow any condensation to run back into the bucket freely.

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Re: Fan specs for humidifier in Martha set-up [Re: SHROOMSISAY01]
    #25582109 -

Yeah for my large Fruiting Chamber I built This.


--------------------





Indoor Greenhouse Build 
          Mid Size Mushroom Farm

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Re: Fan specs for humidifier in Martha set-up [Re: TravelAgency]
    #25582156 -

TravelAgency said:
Yeah for my large Fruiting Chamber I built This.


I had bad luck with the larger pond foggers lasting. I paid $185 for a 9 disk from the house of hydro and it didn't last 6 months. and the second one didn't last much longer. That's why I built the high-pressure mist from the pressure washer.

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Re: Fan specs for humidifier in Martha set-up [Re: SHROOMSISAY01]
    #25582173 -

Man that sounds rough, I definitely didnt encounter that (though mine only ran 8 months) and none of my friends had reported problems. Did you clean it often? Perhaps your water isnt great - I've seen people rig a water filter to their float valve. I'll see if I can find a link.


--------------------





Indoor Greenhouse Build 
          Mid Size Mushroom Farm

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Re: Fan specs for humidifier in Martha set-up [Re: TravelAgency]
    #25582277 -

They were hooked up to a good 4 stage reverse osmosis system. I don't think you are going to get much better water. It may just be the house of hydro ones that suck. That is why I asked your experience. Either way, I was not going that route again. I think I found my solution and I can grow my area easily by just adding misters. But mine is expensive to run it costs me like 1.5 pennies a day to run. Now I just have to figure out how to cut pennies in half. OK, so I got a bad sense of humor shoot me. If anyone knows where I live I'm joking don't shoot me!!

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Re: Fan specs for humidifier in Martha set-up [Re: SHROOMSISAY01]
    #26069120 -

Hi, SHROOMSISAY01. It's been TOO long, but I wanted to report back: I finally made the Martha set-up we discussed here. At first, it was great: Timers facilitated perfect humidity. But after maybe 10 days of operation, the bilge fan is hardly moving air. Am I over-straining that motor?

Maybe I should scale this down to the 5 gallon size. I think my tank is 30 gallons or something (more vertical distance than necessary, more volume than necessary, etc.).

Or should I drill larger holes in the dispersal PVC (they're 1/4")?


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Re: Fan specs for humidifier in Martha set-up [Re: Groovy Hobbit]
    #26069974 -

I would take the PVC out of the 30-gallon bucket and see if it will work without the PVC hooked up. If it works I would make the holes bigger. You might get a whistle when you drill them bigger.  I did. For the life of me, I can't remember how I fixed the whistling problem.

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