using AC with exhaust for co2 replenishment - anyone?

[zor]

I was just wondering if anyone had any thoughts or ideas regarding this.

i was considering using a mini split in a 13 x6 diy grow tent and use a small 4" vortex to exhaust.

I understand that this would be wasting the expensive AC. However, im not sure how wasteful this would be. Also, I'm unclear as to how much fresh air is required for optimal fresh air intake.

If i were to turn the small exhaust on low, id guess the ac could maintain grow tent temps. However, would the plants be getting enough co2 in this type of setup?

 

[RedRain]

why ruin a sealed room and vent? you are runing your sealed setup. if you dont have enough cooling power, then get a proper rated BTU ac for your setup. Get a dehum.

1 ton = 12,000 BTU's

1 ton per 3000 watts

Do it right!!

Why spend cash on a sealed setup, mini split, co2 gen and vent air?

You dont need fresh air intake if you have a proper ac, co2 gen and dehum.

 

[zor]

the intention for exhausting the box would be to supply co2. this way, there is no need for a co2 gen and the associated costs/hassles. i understand the basics of a sealed environment but im wondering if the co2 portion can be skipped with SOME fresh air. and if so, how much? Hope this makes sense.

 

[dunkydunk]

The standard idea for fresh air replenishment is to replace the entire volume of air once every 5 minutes, you could probably go once every ten minutes without causing problems. The effect on the AC is the same as though the unit were trying to cool a larger room. Maybe it can keep up, maybe it can't, no way to know without doing some math, but either way you are wasting AC, or at least overtaxing the machine. If you are in a tent and not a room, then the AC will need to be oversized anyway, because tents aren't insulated, and not very airtight either.

With an AC operating in a vented tent, you will functionally be cooling not just the tent, but the whole room that the tent is in.

 

[RedRain]

sounds kinda stupid if you ask me. you either go with a bottle or a burner. dont try and re-invent the wheel here.

you are making more trouble for yourself.

 

[zor]

The standard idea for fresh air replenishment is to replace the entire volume of air once every 5 minutes, you could probably go once every ten minutes without causing problems. The effect on the AC is the same as though the unit were trying to cool a larger room. Maybe it can keep up, maybe it can't, no way to know without doing some math, but either way you are wasting AC, or at least overtaxing the machine. If you are in a tent and not a room, then the AC will need to be oversized anyway, because tents aren't insulated, and not very airtight either.

With an AC operating in a vented tent, you will functionally be cooling not just the tent, but the whole room that the tent is in.

Much thx man, this makes alot of sense. I'd be essentially cooling the room the tent is in with the sensor and controls inside the tent. Since the AC is capable of cooling the whole room the tent sits in, i think this should work.