4X4X7' Tent - Gavita 750W 120V - Heating/Cooling - Recirculation - C02 -

[TerpeneTom]

Hello,

The title includes a number of variables that I will be encountering when designing my proceeding grow.

I desire to implement a new Gavita 120v DE Fixture within my parameters, alongside two LED fixtures operating parallel. Although, concerns regarding temperature is inevitable, because I am running a recirculating(150CFM - Carbon Scrubber), C02 supplemented environment, my ambient temperature (lung room) runs between 64-68 degrees. With my current air cooled hood (independent) with a 600W HPS I can control the temperature with the fan speed controller, although without the constant cooling the room heats to around 90 degrees.

So my question: Is it practical to run an air conditioner (5,000 btu) within my 4X4X7 tent? Perhaps within my lung room (independent 10'X7'X8' grow area) and the recirculation will circulate enough ambient cooled air to maintain constant ~82 degrees? Would I be better off exchanging the air 2X per minute and running 1,000W+ ? I have the ability to run an intake (w/ HEPA) and outake (scrubber) to an remote location, but I would prefer to run C02.

Is it practical to run a conditioner so I can use elevated levels of C02 @ ideal temperature? Or would greater efficiency be achieved just exchanging 2X? Benefit > Cost?

There are many more variables, but I'm hoping someone can provide some insight. Thanks!

 

[RonSmooth]

I would run a single 1000w HPS in that area and use passive intakes and exhaust fans for temp control and air circulation. Even if 1000w is not an option, I think the LED's would be more trouble than they were worth.

Same with the CO2. Its likely unnecessary and the resources better spent on maintaining an optimal environment.

Are you running the filter as a scrubber and using a dedicated intake/exhaust for the air-cooled hood? This sounds like overkill for the size tent you are working with.

I would run a filter > ducting > hood > ducting > exhaust fan > out. Use the filtered air to cool the bulb/keep odor in check. A passive intake or two at least twice the size of the exhaust on the opposite wall near the floor would draw in cooler, fresh air.

If you can keep the ambient temps in the room containing the tent in a comfortable range, cooling shouldnt be to tough to dial in.

IMO, 150 cfm may be too little depending on how your running your filter, esp if you're dialing it down. What size filter do you have?

 

[TerpeneTom]

1,000W intrigues me, but I would much rather supplement spectrum and improve light distribution opposed to running a single light.

I have achieved an optimal environment with a 600W HPS and 150W LED fixture.

Dedicated intake/exhaust for the HPS, and the 150cfm fan recirculates the air/C02 within the tent, making certain to disperse the C02 evenly and keep mold at bay (70% + Humidity, not certain carbon scrubber operates effectively at this humidity).

I have two passive intakes (filtered) open to introduce fresh 02.

The filter is Phresh, at 120 I believe.

Thanks for the reply.

 

[RonSmooth]

fair enough although a 1000w HPS in a 4'x4' tent with a good hood is about as optimal as gets.

The room containing the tent is under 70 and you are running a dedicated intake/exhaust for the hood, you should be able to get the temps down to 10 over ambient with lights on.

What size flange is the hood? Does your exhaust fan & ducting match? What are you using for an exhaust fan for the hood?

How are you getting negative pressure without exhausting the tent air? If I understand correctly you are running the filter/fan as a scrubber so it just blows air back into the room?


It just seems like more equipment than you need.

 

[TerpeneTom]

When recirculating, the temps would run much too high if I did not run a dedicated fan.

6", everything matches. 400 CFM on a controller.

I don't worry much about the aroma, not a large concern.