Heating issues

Here is my current set up. With rising temps out side and its not even summer yet i am very concerned about my grow.

Temps inside the lung room hit 85 today and inside the grow rooms hit 90. With that being said i do not thing my ac is enough.

Entire room is 18x7.5x6.5
Each grow room is 5x7.5x6.5

Does my ventilation seem good?

I am going to add a 5000 btu window unit inside each grow room. Do you think that should do the trick?

Looking for some advice..

No it does not.

I have 3ea 430W HPS(sometimes +2 ea. 430w LEDS) , my detached room size is about 10 x 10 x 8; with 6" walls insulated. I don't heat this room anytime during the winter(LOW TEMP 17F) , other than the lights. My out-side temp right now is 43F, inside temp is 83.3F; With 10" and powered 6" intake into room, and 10" exhaust powered by >750CFM on a thermostat [set-point 78/5diff.] . my lights are 24/7, With an oscillating mixing fan. I know this is not like your set up but I wanted to give you an idea why I said NO.

You need more CFM's.

With only two small fans (cfm wise) I seriously doubt you are moving 400+CFM because of wind resistance around your lights & through ducts & filters in your configuration. (My set up will pull the door closed.)

Why are you heating the last 600w lamp with 2 other 600w lamps so that it has to dissipate heat into HOT air???? Have you considered cooling lights in parallel instead of your series heating/cooling?

The 8" fan might be adequate for one leg of your set up, I could be wrong, but it just might be that the two small fans are limiting the INPUT to big fan. Try an experiment: Check volume of output from 8" "{ with & with-out 6"s Running} !

I wouldn't add AC until I made the CFM adequate, unless you have an extra $2-3/day.

Double the pipe diameter and you quadruple the Volume. Pi(3.14159) x radius x radius = area ........ 4"=12.5sq.in.
8"=50sq.in ................

@Billiam76

Right now the 6 inch fans at the filters are just small duct fans. I could replace them with 6 inch inline fans. That would bump it up another 400 cfm.... Giving the system a total of 1620cfm vs the 1220cfm i have now.

This also would be the easiest fix vs adding anothing 8 inch fan on the exhaust. As i am very limited on space



As of right now i can fell the pull on the door when i open n close it. And all the walls get sucked in alot.

Also i have tested tested the air flow with and with the filter rans running. Poked a hole inbetween the cool tubes and stuck my finger in there. I can feel the difference in flow between on/off

I have a 40x12 room cooled with a 12k window shaker, 5k total, co2, dehuey, much circulation, sealed, no outside air in/out. I've never seen temps higher than 85 since 2010. No issues fotunately. decided if I see 86 I will cut the hole in the wall and put another one in at once, already got it in a box on a shelf.
Its a very well insulated room inside of an outdoor unheated building. I want for a split air but wife doesnt want for any sign of anything going on in there. like an ac outdoor condenser running in february. (will they even function outdoors in the winter?)

@chemphlegm

Idk how this helps me... But sounds like an awesome set up

Garden_viking said:

@chemphlegm

Idk how this helps me... But sounds like an awesome set up

Click to expand...

sharing what a 12k unit is capable of, also temps of 85 being my max, and adding another unit will surely help us both if temps get high.

chemphlegm said:

sharing what a 12k unit is capable of, also temps of 85 being my max, and adding another unit will surely help us both if temps get high.

Click to expand...

My 12000 ac is a portable one and obviouslly not as efficient as a window unit... Temps hit 80 in my lung room with it set at 70....

So im going to be adding a 6 inch inline to each filter and removing the duct fans

I will also be adding a 5000 btu ac in each grow room that will be plugged into a temp controlled outlet

Garden_viking said:

Also i have tested tested the air flow with and with the filter rans running. Poked a hole inbetween the cool tubes and stuck my finger in there. I can feel the difference in flow between on/off

Click to expand...

I've had a similar issue on a smaller room. The space wasn't equalizing with room temp. It'd run hot. The ventilation runs a negative pressure on the space. My carbon filter is at the end of the ventilation verses at the front. I'm using a 5000btu in about the same footage as you.

I stuck a couple of fans in front the cabinet ventilation intakes. Pushed the cooler air into the space. My temps drop by 5-6f. That's all it took.

SouthCross said:

I've had a similar issue on a smaller room. The space wasn't equalizing with room temp. It'd run hot. The ventilation runs a negative pressure on the space. My carbon filter is at the end of the ventilation verses at the front. I'm using a 5000btu in about the same footage as you.

I stuck a couple of fans in front the cabinet ventilation intakes. Pushed the cooler air into the space. My temps drop by 5-6f. That's all it took.

Click to expand...

I use all positive intakes. The room is not 100% sealed so air gets sucked in through the door gaps and a intake hole...

But the air being sucked in is outside air and it doesnt help if the outside air being sucked in is 90+

Garden_viking said:

I use all positive intakes. The room is not 100% sealed so air gets sucked in through the door gaps and a intake hole...

But the air being sucked in is outside air and it doesnt help if the outside air being sucked in is 90+

Click to expand...

You're gonna have to bite the bullet and buy an A.C. or put the intake inside.

SouthCross said:

You're gonna have to bite the bullet and buy an A.C. or put the intake inside.

Click to expand...

Already bit the bullet
Order 2 5000 btu units. One for each room. Also ordered a temp controled outlet, so i can set it to turn the ac on at 85 and turn the ac off at 80. Should help me save some enegery cost vs just having it run while the lights are on.

Also ordered stronger 6 inch fans to install at the filters. I dont think i should have a problem with heat anymore... Electrical cost may go up though...

Hell Yeah.

I just built this grow room and have spent the money and didnt want to spend any more... But being this deep already i guess theres no choice...

Garden_viking said:

I just built this grow room and have spent the money and didnt want to spend any more... But being this deep already i guess theres no choice...

Click to expand...

Lol, yeah. I thought I wouldn't have the extra money too. We can see how this all turned out.

Sometimes you feel like sticking the receipt up to plants. Saying, "Look at this". "You see this?"

You need to grow. We're invested in this $hit.

SouthCross said:

Lol, yeah. I thought I wouldn't have the extra money too. We can see how this all turned out.

Click to expand...

Il make s journal in a little. Gotta get to work

Garden_viking said:

My 12000 ac is a portable one and obviouslly not as efficient as a window unit... Temps hit 80 in my lung room with it set at 70....

So im going to be adding a 6 inch inline to each filter and removing the duct fans

I will also be adding a 5000 btu ac in each grow room that will be plugged into a temp controlled outlet

Click to expand...

I put a dehumidifier in my room here in humid south. It's control would not keep humidity steady around 60% so added external control which was better for a while but the starting amps was a bit more than that could control...I had to add higher amp rated relay so starting current didn't burn out contacts. A dehumidifier is like an AC (in reverse) so starting two ACs on one thermostat may ruin contacts in thermostat since starting amps of those types of motors can be instantly over 5 times running amps......be careful.