curious618
Well-Known Member
Hmm. And even if I got another carbon filter fan like the one in my tent, it won’t matter because it’s not a sealed room.
Need some help please!
- Thread starter curious618
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Coloradoclear
Well-Known Member
Do you mean a fan like this? If you are, we need to have Renfro recommend you a fan for your footage. . . . And yes I started with this fan many years ago.
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curious618
Well-Known Member
Yup that’s the in-line duct fan I was talking about.
Coloradoclear
Well-Known Member
That fan is worthless! Renfro, do you know where, on this site, the ventilation diagrams are located? There use to be some nice room setup/planner type, easy to follow diagrams.
curious618
Well-Known Member
What if I moved some gravel around the seal block the holes then spray sealed the bottom edge of the building? Think that might help out my cause?
Coloradoclear
Well-Known Member
I would seal them with dirt/gravel from the outside. No need to spray anything since your surrounding floor is dirt. You are probably on a budget like the rest of us. Take Renfro's advice and start with ventilation. If that doesn't work, maybe you could separate the attic of the shed from the lower part with a tarp/heavy plastic to keep that heat from the sun beating on the roof from getting to the lower part of the shed. You would be surprised what a sheet of plastic will do (think vapor barrier on a wall).
Coloradoclear
Well-Known Member
Even cutting a soffit vent in each end of the shed would help (have to be screened). My attic is around 120-130 degrees in the Summer.
Renfro
Well-Known Member
My advice is to insulate and seal that shed up. It's likely that you will encounter pests otherwise. I don't see you controlling the environment in there unless it's sealed and insulated.
As to ventilation, it might solve the problem when the air outside is cool and dry. But when it's hot and or humid then your makeup air that comes in to replace exhausted air, will cause more problems.
If it were me and I was forced to grow in a shed, I would first seal it up like a drum, pour a pad and spray foam it. Before that I would make sure I have trenched in the utilities I require. Then I would run it sealed with CO2, AC and deuhmidifier.
As to ventilation, it might solve the problem when the air outside is cool and dry. But when it's hot and or humid then your makeup air that comes in to replace exhausted air, will cause more problems.
If it were me and I was forced to grow in a shed, I would first seal it up like a drum, pour a pad and spray foam it. Before that I would make sure I have trenched in the utilities I require. Then I would run it sealed with CO2, AC and deuhmidifier.
Joncoh101
Well-Known Member
So im in a similar position to the OP. I have a concrete floor garage, with a roof thats barely a roof - i.e. no insulation, and old garage doors that have massive gaps in them lol. From my understanding, no matter how much venting you do out of the tent, it will result in the same issue. Same as a dehumidifier as well as an AC. Am i correct? So what you are emphasising is to have any affect with the ac, dehu and inline fan is to have a sealed and insulated space?
Renfro
Well-Known Member
Yeah, especially a metal shed (hopefully it's not metal) sitting in the sunlight. You will basically be fighting an uphill battle until that shed is weatherized.
You need to be able to have a climate controlled room from which to pull the air into the tent. So when you exhaust hot humid air out of the tent, cool dry air comes in to replace it.
You can then either exhaust the air from the tent outside or recirculate it into your lung room where the AC and dehumidifier will condition it. If you exhaust it outside then air has to come in from the outside and you will need to condition that air if it is too hot or humid or even too cold.
Weather is a big variable for a vented system. If a storm comes and the air outside is suddenly really wet then you can't pull that air into the shed and expect your dehumidifier to keep up.
Joncoh101
Well-Known Member
Thanks man great info, im sitting with the issue now of moving my tent from the garage inside but now i have to fight light polution when the flower cycle comes round and i switch to 12/12. I was using passive air intake vents at the bottom on the mars tent and now thats going to be a problem smh
curious618
Well-Known Member
Just my luck it is a metal shed. Basically think about a carport/covered parking structure with a shed attached at the back. That’s what I’ve got. My budget won’t allow for pouring a slab, etc and I’ve already got time and money invested. So I’m going to try and seal up the bottom on the outside, get some spray foam insulation and try to plus all the light holes I see, and try to figure out an exhaust system. Can’t turn back at this point! Lol
Renfro
Well-Known Member
That will be the biggest single improvement you can make is a good thick layer of foam insulation on the walls and roof. Then do the best you can with the door, even that stick on reflectix is better than nothing if the doors slide. You can also get that blue foam board insulation.
If stealth is a factor then you need a good carbon filtration system on your exhaust and possibly another carbon filter running inside the shed/tent as a scrubber.
curious618
Well-Known Member
Stealth is a factor kind of lol, I’m out in the country so there are a lot of smells in the air as is. And everyone out here pretty well keeps to themselves. On top of what I’m gonna do, would you suggest an ac unit inside?
Renfro
Well-Known Member
If you get heavy rains does the water try to run towards the shed? Meaning does it make the gravel floor damp? You may need a barrier on the floor to prevent the humidity from rising if thats the case. 45 mil pond liner might work for that, lay it on the gravel, turn it up the sides a bit at the walls then spray foam the walls sealing it up tight.
curious618
Well-Known Member
It does run towards the shed. I was going to drop a few sand bags down in front of the door. That’s the only place it gets damp.
Renfro
Well-Known Member
If you get it sealed up pretty good then put the AC and dehumidifier in the shed, exhaust your tent into the shed (now your lung room) and you are probably good to go. Might even need to add CO2 or vent the shed just a little bit to provide fresh CO2.
It all depends on how well the shed is sealed up.
What type of AC will you use? If it's a portable single hose unit then it would have to pull in fresh air through any cracks in the shed or vent provided.
curious618
Well-Known Member
It would be a personal small room AC. I’m just using bag seeds right now. I don’t even know what strain it is.
farmingfisherman
Well-Known Member
Is the shed much bigger than the tent? If so do you have overhead trusses or girders that you could attach a hoist to? If so I'd say did a hole a little bigger than your tent and take everything underground. Mother earth does a great job of insulating! I know it sounds like work but had a buddy once do it under a out building and it worked really well. You place the tent on a sturdy platform with attachment points to be able to raise and lower it out of the hole. Small hoist or pulley system is all you really need to lift it with. Once it's in the ground it's easy to cover up the hole with clutter in the shed. Been underground you have no worries about light leak, exhaust warm air out the top and pipe fresh air in to the bottom with pvc pipe and a couple of fans. Might sound complicated but it's really not that hard. Good luck! P.s. Have to add that we built a frame out of 2x4's and used plywood for flooring and then wrapped the inside with white plastic for light reflectivity and cleanliness. It was before tents were a thing!
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