Grow room help please

Serrated_

Serrated_

Well-Known Member
I have a large unfinished crawl space with nine ft ceilings. I need to construct a hybrid tent. Due to an HVAC system being in the same area and it drawing odor. So the grow will be 6 x 4 feet. I have heavy plastic to make a sealed area that I can vent the smell out of. I already ran 6 in ducting and it moves 400cfm outside. The problem I'm having how to build a door. I don't want to Frame a real door. I would rather make something that opens and reseals. Velcro is my thought, but we have a lot of years of experience on the forum so I thought I would ask for some advice. I am really trying to make a doorway with plastic sheeting.
 
qballizhere

qballizhere

Well-Known Member
Serrated_ said:
I have a large unfinished crawl space with nine ft ceilings. I need to construct a hybrid tent. Due to an HVAC system being in the same area and it drawing odor. So the grow will be 6 x 4 feet. I have heavy plastic to make a sealed area that I can vent the smell out of. I already ran 6 in ducting and it moves 400cfm outside. The problem I'm having how to build a door. I don't want to Frame a real door. I would rather make something that opens and reseals. Velcro is my thought, but we have a lot of years of experience on the forum so I thought I would ask for some advice. I am really trying to make a doorway with plastic sheeting.
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I would suggest panda film and tarp zipper for the doorway. Here is a youtube on it.
 
giantsfan24

giantsfan24

Well-Known Member
qballizhere said:
I have not had the need to cut one I'm 6'2 and need the height but I believe you should be able to cut it. Try it let me know how it worked
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I think it's doable. This provides a great solution for my box. It's only 4' tall but cutting it to length shouldn't be difficult.
 
Bareback

Bareback

Well-Known Member
giantsfan24 said:
Are these zippers light tight?
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The ones I get at at the building supply are cheap like less than 10$ , so you might have to add a blind cover. I built my room with blind covers over the door and you can't find the door even if you know where it is.
 
giantsfan24

giantsfan24

Well-Known Member
Bareback said:
The ones I get at at the building supply are cheap like less than 10$ , so you might have to add a blind cover. I built my room with blind covers over the door and you can't find the door even if you know where it is.
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I got one that's a bit more expensive but it's lite tight. I was able to get a good amount of the panda film, 10' x 10', and will add this to the inside of the door jamb then weather seal the door side of the door jamb and that should handle about all the light sealing I'll need...hopefully.. lol
 
Serrated_

Serrated_

Well-Known Member
giantsfan24 said:
I got one that's a bit more expensive but it's lite tight. I was able to get a good amount of the panda film, 10' x 10', and will add this to the inside of the door jamb then weather seal the door side of the door jamb and that should handle about all the light sealing I'll need...hopefully.. lol
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This cheap one Home Depot was $19 for two 7' strips they are very light tight. And they did come with a really cool tool to split the plastic once you open a zipper
 
Serrated_

Serrated_

Well-Known Member
So I think I have a really good seal on the room. All of the walls bow in, with the two 6 inch exhaust fans. So the question for the Forum, it is clear I need to create an air Inlet but I've heard anywhere from 2x to 5x the exaust diameter. And I don't understand why. 6 inch exhaust venting running 340 CFM should only need a 6 inch Inlet. Can someone please explain?
 
Bareback

Bareback

Well-Known Member
Serrated_ said:
So I think I have a really good seal on the room. All of the walls bow in, with the two 6 inch exhaust fans. So the question for the Forum, it is clear I need to create an air Inlet but I've heard anywhere from 2x to 5x the exaust diameter. And I don't understand why. 6 inch exhaust venting running 340 CFM should only need a 6 inch Inlet. Can someone please explain?
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Sorry I can't explain in a way that makes sense, but there's a formula for cfm conversation in relation to passive intake try @Budley Doright he does havc and could probably explain the volume x whatever = sq" of passive intake for x amount of exhaust
 
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