I'm not currently in this situation but was wondering if you had a air unit directly in your grow tent is it possible to still be able to cool the outside room? Say your tent is in a bedroom?
Air conditioner blows the hot air out the back so no you'd be cooling the tent and heating the room. Unless you buy a portable ac unit and vent the air through ductwork.
That's really what I wonder if it was portable will it still cool the surrounding roo your opinion? Iyo?
You would need a separate room for the ac unit then pull cold air in from that room. I have mine setup like that. 3 rooms one room is the flower room one room is the veg room and the 3rd room is where I have the ac unit. I pull cold air with inline fans into each room with a temperature controller. Pump the hot air from the flower room into the cold air room through a carbon filter so my ac unit works a little overtime but extracts that filterd hot air outside of my house into the atmosphere
That's the way mine is kinda. A bedroom with tent in it except I still need to pump the hot outside. Right now it recirculates and stays fair inside the tent and cool in the bedroom even cold but stale. I veg in daytime but I probably am going to have to flower at night I don't know positively but im going from 600 watts veg to 1000 flower. Probably going to flower at night but still might have to hook more exhaust up so I can pump it outside
Blowing cold air in beats blowing hot air out. A carbon filter fan in the bedroom will make a huge difference to the room air quality. Nothing beats central air for cooling. The ambient to tent temp is almost always 10 degree F. No matter what the room temp is, So gotta keep the room thermostat 10 below your max cannabis temp. The max on the lights is usually 90F to be safe.
You are right about 10f difference almost always. I have cool air sucking into my tent but im still thinking about blowing the hot air into the attic or outside
forgive me if i spew a lot of info you already know. I live where it is currently 115 F so a/c is important. Yes you can have a/c in your tent but it will not cool the area outside the tent. A/c only moves heat energy from one area to another and that takes a lot of work(energy, $$). There are 2 types of portable a/c units--one hose and 2 hose. Both will work inside a tent but there are some problems with them in tents. Negative pressure..... one hose type a/c will create a slight negative pressure in the tent which is good BUT smell will be exhausted through the exhaust hose. Putting a carbon filter on the hose end could overwork the small a/c fan exhaust fan and shorten its life. (LMK if it has been done and how etc.) A 2 hose a/c in a tent will solve the exhaust smell problem(mostly--much less than the single hose type) but this type a/c will create positive pressure in your tent unless your carbon filter/ fan set up is pulling or pushing more air out than the a/c is pushing in, and if it were, you would be turning over the tent air too fast so it would be a waste of energy.
I'm wondering can I be using too much negative pressure? My air conditioning is in the window I haven't hooked my filter up yet but I have the fan hooked to the light. Is it possible to suck the cool air out before it has a chance to cool it more than it can? I don't think so and I think im doing it mostly the best possible way. It gets super hot here too. 98 to 100 but the humidity makes it shoot to 115 like nothing some time 120 but my room stays around 72 to 76 and tent from 76 to 82 most the time running during daylight. I think I can keep it around 76 to 78 if I run it at night but im concerned because im at 600 watts veg planning to flower at 1000 if possible I think I'll be able to if I have to run at night. Also I have 1 flap at the bottom of the tent open as opposed to 2 and seems like that works better than 2 but also creates a little more vpd
Why not just crank the ac in the bedroom . Get the bedroom 70 to 75 f perfect for me. That tent you can hook that filter up to keep the smell down. Just vent the tent with the outside room air . Best option only if your carbon filter can be reversed . Filter outside of the tent sucking air from the inside of the tent . Cold air being pulled into the tent .
a lot of neg pressure just means that the time for the tent to equilibrate with the room temp will be quicker is all. the question is do you have enough reserve exhaust fan speed to compensate for the almost double in wattage of the light in flower. If you dialed down the fan to 1/2 speed now and you are keeping good temps then I think when you flip you can just increase the fan speed. If you are maxed out in fan speed your options are: Cool down the room more if a/c can do it--$$ and or get bigger exhaust fan and or open up another bottom vent. you might want to put on air filter now to see how temps react since it will decrease your cfm.
That's how I have it and it's doing fine with 600 watts but Im afraid when I try 1000 at flower it may not
I still have quite a bit of air conditioning and fan speed and I can flower at night when it's easier on my air conditioning unit when the time comes
going from 600 to 1000 is a lot more thermal energy to get rid of. Your forward thinking is legit. Sounds like you are using a cool tube or vented hood. I saw a test on the performance of those style fixtures and the amount of heat energy they remove was not as much as one would think. I never used them but it seems they should. The result of the experiment was most of that heat radiates through the ducting from the light fixture to the tent wall. Interesting so i made a mental note of that. Your set up will put it to the test. IIRC I said in a post to you(?) about a question you had about LEDs. I think I said if you know your HID system well and have no thermal issues or height limitations, stay HID. If that was you, then this is exactly a reason for LED. A watt is a watt when it comes to cooling; however you will just need a few hundred less of them to do the same amount of "work". Really that in itself isnt the story. It is the cost to move that light>heat energy to where you dont want it. THAT will pay off bigtime. Cheers
Just get the air in the tent pulled out a bit faster . 400 more watts . That ac will handle it easily .
Thanks for the information friend. 1 thing I am thinking I will do is get a keyhole saw and cut a 6 inch hole in my ceiling and direct my exhaust into my attic because my air conditioning is very strong but it's so hot here and it's overworked slowly the temp rises so that'll at least direct a lot of stale heat out my room. Also I may flower at night but im vegging in the day right now. I sleep in there that's why I rather run my light in the day but if I end up flowering at night im going to put some black breathable cloth shade cloth over my intake vents. Also I still have 30 percent or 3 higher speeds on my exhaust fan still need to hook my carbon filter up. The fan is extremely powerful. Yes it's a air cooled hoods works so good I can hold my arm to the glass without it getting really warm. But that heat that exhaust is just constantly recirculation from the tent back into the bedroom on top of outdoor heat it slowly warms up during the day. Thanks for your help
i think so too man im just being patient wanting to know positively as im still planning to veg for a while I usually fill my canopy 70 percent in going to go above 70 percent and direct my tips to grow vertically a little bit after being filled and if I must im planning to prune.
I do wonder if when I try LED I have 640 watts of I will be able to yield what im about to find out soon enough with 1000 hps. That's of course if I grow the same strain the same technique,light schedule feeding etc..