First time indoor growing dealing with heat


#1

I’m testing my 4’x3’x60" tent inside an outdoor building. I’m using a 4" fan, carbon filter inlet and outlet, led light. Not wanting to kill plants, so I’m test my environmental control ahead of time. Here is my situation. I live in the deep south of the USA. Current temperature out side is 75 f with 70% rh at night 90 f during the day with 95% rh and its barely starting to get summer.if I turn on my fan the temperature of the tent rises close to the outside temperature. So I have a few questions. If I air condition this building and move my inlet inside instead of outside will I still be getting the proper fresh air needed for the plants. Open for any suggestions.


#2

You are going to have issues when you go to flower. Bud rot and mold with the rh that high.

I have my inlet with my carbon filter in side my tent. Vented air goes outside you will probably need a dehumidifier to for the high rh. Here is a pic of my setup


#3

Thanks ThcinKC
If your inlet is inside the tent where do you draw fresh air from? Like I said before this is my first indoor setup.


#4

The bottom side of my tent has a flap that opens and air comes in through there


#5

The inlet will make the room the same temp as the air being sucked in to room


#6

Add an exhaust fan


#7

Welcome to forum. You definitely need an ac in there & that will help with temp & humidity. You will need sm fans inside tent to move air around. Im in south & a dehumidifier is needed. Your humidity & temp are too high & unfortunately a dehumidifier throws a lot of heat.


#8

Thanks Laurap
Like I said before I don’t have plants in this danger. I’m getting my temp and RH under control in advance. I’m adding a/c to this building and a dehumidifier. My biggest question was, is it ok to use room fresh air from an a/c room and not fresh outside air. From what I’m seeing in replies I guess so.
Maybe I was thinking too technical.


#9

You definately need to get the RH down to acceptable levels , preferably somewhere around 60% for veg and 40 to 50% for flowering. I think the only way forward for you is a dehumidifyer as has been mentioned above combined with some AC. Your carbon filter will not function efficiently abovee 70% relative humidity, the moisture in the air simply blocks the pores of the filter, this in turn reduces the efficiency of the exhaust fan and further compounds the issue.


#10

Normal A/C units already act as a dehumidifier. (I’m not saying you want also need a dehumidifier) Cool air from the rest of your home likely has a much lower humidity than in your grow room. My grow room has portable ac unit, but I also have a box fan in the door way blowing cool (low humidity air) from the rest of the house.


#11

I’m currently building a 12x15 grow room. I’m going to install a small air conditioning unit in it! Will I need a dehumidifier? And for the winter I was going to install a small propane heater ! Do you see any problems that I might run into? Thank you!


#12

Idk about the heater but I have a room inside a room and the bigger is about that size with a window unit runnin 24/7 set at 68 degrees. Given its hot and humid where I live the inside of the room with lights on is 46 Rh and 75 degrees F. Lights out Rh jumps to 78 and temp is 68 F so I’m going to need a dehumidifier for flower. Hope this helps :v:


#13

Yeah that helps! Thanks!


#14

I forgot to mention my light is an led so Temps may be different if your using hsp/mh. :wink:


#15

Propan eats oxygen so if that’s in the room it will change oxygen lvls for the ladies


#16

Thanks mountainman1 I did add a/c and a dehumidifier to the setup. With out side temps in the high 90’s and RH in the 90’s I’ve managed to keep the tent at 75 degrees F and Rh down as low as 45%. With the led lights on .Looks like fighting the elements is working.