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Is there any difference in the co2 beverage kind to regular kind we need in a grow room?

Hello. I'm new to growing. Started Jan 2020. I decided to build a room in my attic with heating and cooling with a mini split. Room dementions are 14ft long by 6ft wide. This summer has been 100°F all summer. It has stressed out my mini spilt to the point it freezes up sometimes. My venting...

I spend a lot of time in my room. I have concerns about me dropping dead in a completely sealed room with the lack of o2 and 1200ppm co2 in the air. Have you experience this?

Are you in the attic as well? This is my 1st summer and its been 100°F all summer!! My mini split is starting to stress and freeze up.

This kind of got confusing. Thanks for taking the time to respond and help. So what I was able to take away from all this. Is that I should turn off my 4inch fresh air duct and plug it off. And do the same with the 6inch exhaust duct? Then that's a sealed room? So no body will drop dead from the...

I hav3 I have a 9000btu mini split

So what should I do not run the exhaust and run the fresh air intake?

I'm a newbie. I built a sealed room in my attic. I have a 6inch exhaust fan with carbon filter. And I also installed a 4inch round duct with can-filter to add fresh air into the room. I'm adding a co2 soon. How's my setup?

I'm a licensed electrician in CT. This 200amp service upgrade should cost you $2000-$3000.