4 X 8 Sealed Tent Setup Question

[timmur]

I'm getting ready to pull the trigger on a new tent setup and I wanted to get some thoughts around sealing it up. Here's the basic equipment list.

Secret Jardin 4 x 8 Orca 240
UC 6 with remote epicenter
1/4 hp chiller
(4) Cycloptics Greenbeams lights
14,000 btu Portable AC
70 pint dehumidifier
Hyper Fan Stealth 6 in 315 CFM
Phat Filter 20 inchx6 inch, 450 CFM

My plan is to recirculate the air in the tent with the fan and carbon filter and cool/dehumidify the environment inside the tent with the duhey/AC, and CO2 (bottle). I've read quite a bit about the difficulties of running a tent sealed, so I wanted to hear opinions regarding how well this will or won't work.

 

[RonSmooth]

A dehumidifier and an AC sounds redundant and probably pretty inefficient.

You could probably keep a 4x8 tent cool without AC. Not familiar with your lighting setup, how much heat does it produce?

Why sealed?

 

[Granger2]

There's some redundance with AC and dehu, but IME, AC's only do a partial job of getting the humidity where I want it [50% or less].

In my neck of the woods there's no way to keep cool enough running HID's 6+ months out of the year. RH would also be too high much of the time with risk of PM and Botritus. Maybe in Canada or at altitude. Good luck. -granger

 

[timmur]

A dehumidifier and an AC sounds redundant and probably pretty inefficient.

You could probably keep a 4x8 tent cool without AC. Not familiar with your lighting setup, how much heat does it produce?

Why sealed?

The lights produce about 1,380 watts of heat. Sealed tent will not stay cool without AC. Sealed with CO2 for the highest yielding setup. When lights are out at night the humidity will likely climb high enough to require dehumidification.

 

[ChasingGreen]

Is the tent going outside or something? If it's inside a house, and the house is kept at like 75F and dehumidified to around 45 RH, why would you need the AC / Dehum, and why would the humidity climb that high?

 

[timmur]

Is the tent going outside or something? If it's inside a house, and the house is kept at like 75F and dehumidified to around 45 RH, why would you need the AC / Dehum, and why would the humidity climb that high?

Using CO2, so can't keep the tent cool with fans. Lights are not air cooled either. I assumed humidity would climb with little air conditioning going on at night.

 

[queequeg152]

watts of heat?

i suggest you convert this to BTUH so you can compare it to your ac units rating.

if your light consumes 1400 watts, its producing at least 4760 btuh.

i would advise against a portable ac. they are mostly dog shit. if you insist on one, at the very least buy a two duct model.

these units are always leaky, even the two duct units. the single duct units leak a shitload, its necessary to their operation.

is there anyway to install a window unit and fill a room with co2,not just the tent?

 

[timmur]

Thanks I've already done the BTU calculation. If the portable units are even close to their rating then it should cover the load. The room is 12x14 and using it as a lung room isn't really feasible. What do you mean when you say those ACs leak? Thanks.

 

[queequeg152]

single hose portables leak air because they have too. that air thats getting pumped out of the single hose... where does it come from?

dual hose units leak less, much less, but still more than a typical window unit.

portables in general suck because the condensing coil is brought inside, necessitating the use of ductwork to pump it back outside. its just shitty in principal.
this duct will tend to leak, not only in the hose itself, but at the connections. this hose tends to be uninsulated as well, meaning heat is moving through the mylar or pvc jacket of the duct itself.

the heat gain from uninsulated duct will be small, but not 0. probably less than 100btuh assuming something like a 3 or 4 foot length of duct.

the Styrofoam cowling and and internal parts always leak air... in the case of a window unit though, only the evaporator is inside, so leaks dont mean a whole lot.

on a portable, some amount of air from the condensing side will invariably leak into the conditioned space. how much is going to depend on the quality and age of the unit i imagine.

 

[sdd420]

In hot temps (100*) a window ac will continuously drip water as it cools and also dehumidifies in my case anyway and is enough to cool my tent. During flower do at night when it's coolest I like 9-9 fwiw peace and good luck

 

[timmur]

Well maybe I don't need a dehumidifier after all. My relative humidity in the house is running between 30-34%.

Thanks queequeg152 for the explanation. SSD420, I will plan on flowering at night as you suggested.

 

[ChasingGreen]

Not only is your house RH low, but usually those portable AC units can dehumidify as well, so no need for a 2ndary one.