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Ventilation Setup for Smell Attenuation
MrBz21started grow question 3 years ago
Is this setup ok? Since the air tent will be recirculating i think the smell will be atenuated. I haven't seen other growers with this setup (I'm a newbie though), so I wonder if there's something wrong with it.
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Setup. Ventilation
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chronicsteranswered grow question 3 years ago
My experience is that you will have a hard time with heat / RH etc as well as there is no room for fresh air replacement. The air coming out of the tent will be a certain humidity and temp. You push it back into the tent and the air will heat up again as you are essentially using the tent as a heat exchanger. And with no fresh air coming in, I'm apt to think that the RH will rise as the same air keeps getting reheated and cooled and reheated etc.
I pull the air through the filter
[Ducting <- fan <- filter <- Tent air] and push it out the ducting. If I weren't drying 2 big ass plants right now, the smell in my basement would be next to nothing even though one tent has 2 more big ass plants starting flower. I've got a this in a 4'x8'x80" tent https://www.amazon.com/gp/product/B084XHGSBT/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 and it sucks the walls of the tent in just a little bit. and has no smell to it at all.
Chow_13answered grow question 3 years ago
If you go with a recirculating method you will need to control the temp/humidity/CO2 inside the tent so you will need
1. Temp Control - AC unit and/or Heater depending on the environment outside your tent.
2. Humidity Control - Humidity sensor with attached humidifier and dehumidifier.
3. CO2 - CO2 bags at a min, but either burners or canisters and a sensor.
4. Ensure no leaks are in the grow area( zippers, pinhole from sewing, vent flaps not air tight ) since you have a neutral air pressure it will leak out of any spot it can.
Its much easier to have a passive intake( bottom vent on most tents ) and to have a carbon filter with a fan at the top always on( negative pressure ). As long a the carbon filter is rated for the CFM that the fan does you will not smell anything until the carbon filter needs replacing.
Happy Growing
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TheUk420Showanswered grow question 3 years ago
No fresh air intake. it will work but wont be the best you need a constant supply of fresh air recirculating hot spent air is going to cause you some problems :)
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