100% Sealed room with CO2 enrichment, vent dump during lights off ??

To vent or not to vent a sealed enriched room. At anytime of the cycle-- on or off.

  • Total voters
    27
N

nopifarms

Member
kulakush said:
While the yields are still good with CO2 enrichment and no air exchange in a sealed environment, the hybrid CO2 enrichment with air exchange works better. You get bigger nugs and more weight. I don't know the exact science of why this occurs but I can tell you from experience of doing it both ways and my best results have been using both CO2 enrichment and air exchanges. My og kush plants thrive this way. For example when I ran CO2 in an enclosed room that uses a scrubber to clean the recycled air, I would average around 2.3-2.5 pounds per gavita fixtures. The nugs do get dense but not very big compared to the hybrid system. When I enriched with CO2 with air exchange I started hitting 3+ pounds per gavita fixture. My og kush nugs were bigger and did not rippen so quick. All my buddies that are getting over 3 a light are doing the same. The completely sealed grow room environment enriched with CO2 with no air exchange is an inferior technique to the hybrid system. 1st photo is the the top bud of my og strain using the hybrid system. The second photo is a top nug with no air exchange running CO2 in a sealed environment where the air is recycled and only scrubbed.
Click to expand...

Old post but was interested in when the air exchange happened? was it temperature based? or just based on a schedule? Looking into a hybrid combo. Thanks in advance
 
Renfro

Renfro

Well-Known Member
I'll chime in too just for shits and grins since ppl will be looking at the thread now.

For me it depends greatly on the amount of water in the outside air. We don't wanna blow in air that is way too humid. We also want to prevent the temperature from dropping too far if the ambient air is very cold.

Remember cold air = dry air.

A vent cycle at lights out can really help with the associated RH% spike that many grows tend to encounter when biomass is very large. This of course depends on the ambient air conditions.
 
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