Fresh air from outside and humidity question

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SquirrelMaster87

Member
Basically growing in a little shed, I cut a 4 inch hole for fresh air intake at the bottom so I’d have some fresh air in the tent, also got a 6 inch scrubber running Inside exhausting the stale air and I’m also pulling cool air from outside over my light and blowing it out the other end. I just went into flower mode about 2 weeks ago and was wondering if the humidity outside is basically going to be the humidity inside where I’m growing. My RH seems to be all over the place. Thanks
 
My Name is Mike

My Name is Mike

Well-Known Member
SquirrelMaster87 said:
Basically growing in a little shed, I cut a 4 inch hole for fresh air intake at the bottom so I’d have some fresh air in the tent, also got a 6 inch scrubber running Inside exhausting the stale air and I’m also pulling cool air from outside over my light and blowing it out the other end. I just went into flower mode about 2 weeks ago and was wondering if the humidity outside is basically going to be the humidity inside where I’m growing. My RH seems to be all over the place. Thanks
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Yes. The RH% and temp of air from outside will be what you'll pull inside your tent. Plants as they mature from veg to flower also increase the RH%. If you can control the environment within the shed and use a tent, it may help.

The sounds of your current setup, you're at the mercy of mother nature.
 
NukaKola

NukaKola

Well-Known Member
I'm growing in a shed as well. 6" intake, 6" exhaust, air conditioner, dehu, and evap. humidifier. I have my 6" fans on a cycle timer to come on for 1 minute every 5 minutes to cycle fresh air in until I add CO2. I have the AC and humidifier on during lights on. Dehu on during lights off.

My climate is fairly dry as I live in a high desert so you might need to configure things a bit differently. Thermostats and Humidistats will help you dial things in.
 
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SquirrelMaster87

Member
My Name is Mike said:
Yes. The RH% and temp of air from outside will be what you'll pull inside your tent. Plants as they mature from veg to flower also increase the RH%. If you can control the environment within the shed and use a tent, it may help.

The sounds of your current setup, you're at the mercy of mother nature.
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Ya kind of thought so, looking at picking a tent up for my next grow,
Renfro said:
Well you are pulling air in from outside. I don't see how you could achieve lower RH% or temperatures than the outside air.
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Renfro said:
Well you are pulling air in from outside. I don't see how you could achieve lower RH% or temperatures than the outside air.
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Didn’t think it was possible, thought about a dehumidifier but I don’t believe it would work. Just wanted clarification, don’t know what else to do to lower the humidity.
 
Rooster91762

Rooster91762

Well-Known Member
SquirrelMaster87 said:
Basically growing in a little shed, I cut a 4 inch hole for fresh air intake at the bottom so I’d have some fresh air in the tent, also got a 6 inch scrubber running Inside exhausting the stale air and I’m also pulling cool air from outside over my light and blowing it out the other end. I just went into flower mode about 2 weeks ago and was wondering if the humidity outside is basically going to be the humidity inside where I’m growing. My RH seems to be all over the place. Thanks
Click to expand...
You only cut one 4" hole at the bottom for ventilation? That is way way to small bro, typically they run about 10"x 6" with a metal vent cover over it, and have at least one on each side of the shed, just my 2 cents.
 
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