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If you place your fan or filter outside your grow room, (or in any way vent outside your room) you will be running negative pressure, so all that nice ACed air is wasted, CO2 if your have it is wasted, and you will never control your humidity. The only thing you can vent without worrying about...

If you put twice the BTU size AC for what you need, it will continuously cycle, causing RH spikes, and will use more juice cause of initial load to startup compressor every time it kicks on. You don't want a portable if your want to run a sealed room, and out of the three, its the least...

That is simple then, obviously that room gets the AC, and you do not run a intake or exhaust out of that room. Though you can run air cooled lights with both the intake and exhaust running into another room, or outside, so long as the system is properly sealed. If you need to deal with smell...

I stand corrected, i thought a inverter would not cycle. I am all for sizing an AC right, but what about additional load due to nature? How much capacity can i leave for that, and would a inverter system allow for more? Power wise, would it be better to run the AC lights on, and a dehumidifier...

Unless you have a inverter compressor, it will cycle some, but not too bad i would think. But then again, i live in Maine, if i lived in a state like Arizona, i would not have read half as much on the subject, as i just would not care. It really depends on what your local climate is, PM is bad...

You can run a carbon scrubber exhaust fan, but just exhaust into the room your cooling, not into another room, or window, or the room will no longer be sealed. I have a carbon scrubber in my tent, connected to a fan that is also in my tent, but that fan just dumps the hot air into the room the...

Corrent me if i am wrong, but did you not just prove my point for me? "Real world is you buy a 12k btu system and put the set point at 72f the system runs until it reaches set point then modulates to maintain the set point." When you reach that set point, and the system has to modulate, its...

If your cooling needs are 9,000 btu, and you buy a 12,000 btu inverter system, the compressor runs at 75% continuous. If your cooling needs are 12,000 btu, and you buy a 24,000 btu inverter system, the compressor runs at 50% continuous. A inverter compressor modulates from 15 or 25% up to 100%...

Mostly just read, i have not been really active on the forums since the days of overgrow.com. Every now and then i would pop on here or other sites, check out the latest lighting, growing technique and such, but since i was not growing myself, was never fully committed. Past 6 months however, i...

Yeah Ive been looking at them, it solves the problem of exactly matching your AC to your grow, you can ramp down the compressor, so that it runs continuous, thus eliminates RH spikes, but you still have capacity left if you expand.

Think of the room as your buffer, or your rez, you treat the rez, then pump it into the tents. Yes your temps will be a bit higher inside the tent, then your room temp, but that is expected, and needed. Bud rot take hold the lower the temps your running, (typically under 70deg) i like to keep...

Sealed room does not necessarily mean sealed, (though the more the better) it just means closed loop, neither negative, nor positive pressure. Yes there are more downsides that just spilling your ac into the next room. You will never control your humidity, as all your treated dry air goes right...

You cant dump your carbon filter exhaust into another room, or your room is no longer sealed, and your wasting AC and CO2. You either have your carbon filter in your tent, hanging at the top, then have your fan exhaust into your ACed room, or have the fan mounted at the top of your tent, then...

It sounds like you did not properly size your AC to your room, you want it sized properly so it runs continuous, it will eliminate both temperature, and RH spikes. You have two real options, add more lights, or get a smaller mini-split. Or just deal with the spikes, your temps are well within...

How many windows do you have in that room? If your running air cooled lights, you can duct the intake and exhaust to a window, and still maintain a sealed room. A window AC recirculates the air, there is no negative pressure, so long as you do not have any intake or exhaust going in or out of...

Don't do that hack job, yes the hot air comes out the very back, but where did that hot air come from? See all those vents in the sides/top? Well those normally sit outside as well, well air goes in there, and out the back. Think about this for a moment, when you use it indoors, all your nice...

You don't need the ac to dump into the tent, just the sealed room the tent is in. You just have your carbon scrubber/fan dump the hot air from the top of your tent into the room, then have your intake be at the bottom opposite corner, it will circulate just fine. Its what i have, my AC is in the...

I am building a 9 CXB3590 light running at 1050mA, I was able to find the DB bin listed at Mouser, but its a "Non-stocked" item, just waiting on a reply on price, and time it will take to deliver. What I have not been able to find is, DD bin, not listed for sale anywhere far as i can tell, not...

Thanks, i will check that out, like i said nothing is really set in stone, and i have enough space to try any configuration i want. In the interest of getting a first few crops as fast as i can, ill be using the best clones i can get my hands on, that being said anyone have any ideas on what...

Well i'm finally in a position to grow again, i have not grown in years, my last setup was a aeroflow 60 in a crappy dirt floor/stone wall basement, this time its a medical setup, and i plan of maintaining legal plant numbers. In that regard i want to grow trees, i have an entire top of a barn...