Battling heatwave with AC but no CO2

[Mr. Organic]

It gets up to 91c in the 12by4 room with (2) 750w air cool hoods on a 6in inline fan, i have the option of running one small intake with one 6in fan extractor fan or running AC.

As i don't have co2 i think i need to exchange air but don't want to lose all my ac so can i just vent the room for 15min every hour?

What are my options i am in week 3 flowering.

 

[olekingkole]

If it's over 80 outside, venting the room might not lower the inside temp much , but give it a try. You should know if its going to work within half an hour. Next turn off the exhaust fan and turn on the air conditioner. See how that does and don't worry about CO2 yet. If the air conditioner works better than the fan, you can always buy some CO2 tanks and a regulator. Now with the air still running, turn on the exhaust fan. You may find that gets the temperature even lower. Plus you will have fresh air being drawn into the room by you exhaust fan. Don't get too hung up over CO2. More important is humidity. It's got to be over 40%. Repeat "trial and error is my friend".

 

[Mr. Organic]

out door RH is 75-80
out door temp is 80-85

grow room lights on (at night) temps hit 86-91
Ac dial is set to 80 and works like a charm, lights on temp =77>81

I set the exhaust to 15min every hour, is that acceptable?

 

[Granger2]

Probably acceptable, but the only way to know for sure is to measure CO2 levels. You can get one of these: https://www.monstergardens.com/Clim...tors/Autopilot-Desktop-CO2-Monitor-auto-pilot [check Amazon]
One feature is that it will log a 24 hour period every 30 mins. You'll only need CO2 for about 3 more weeks, then you'll want to keep it at pretty close to ambient [400 ppm] for the last 3-4 weeks. Good luck. -granger

 

[Mr. Organic]

i may need more than 3 weeks as the plant suffered from heat and looks like week 1 pluss is a sativa. but thank for the tip about dropping co2 levels the last 3 weeks. does that pilot also work as a controller or does it just monitor co2 levels?

 

[Granger2]

Just a monitor.