Grow tent to hot!

Dankestsmell

Dankestsmell

Well-Known Member
Hey guys, have a little bit of an issue. Got everything setup today put my thermometer in between my two plants. Opened it back up and read it was 93 degrees kinda wanna tackle this down. I made a diy 120mm pc fan exhaust at the top of the tent. And then using a little fan at the bottom. I'm looking for the cheapest route possible. I have a little portable Swamp cooler in the bedroom keeps the room pretty nice. Idk if I can hook a ducting up to that and blow the cold air from that into the tent? During the light hours can i have the Door to the tent open for the fresh air to atleast blow in. The pc fans I think are to weak to pull the hot air out. Could I put my normal house fan on top to pull hot air out
 
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coreywebster

coreywebster

Well-Known Member
1, Don't have the thermometer in direct light, it should be above the light line to read air temps.

2, do you have lots of intakes, passive holes or intake pc fans? The fan can only remove air if that air can be replaced easily and a weak fan like a pc fan will just move air in front of it if there is resistance for it to fight.

A long time ago I built a cupboard grow container with about 200w of cfls, in that I had 6 pc fans up top pulling air out and 6 low down pulling air in. It just about worked.
You should be able to find the cfm rating of the PC fan your using and calculate how many you will need to exchange air out every 3 minutes at a minimum.

Assuming your running lights on at night time and off in the hottest part of the day, the first thing I would do is move that thermometer to the correct place. Plants can take a huge amount more radiant heat than they can air temp, light heats a thermometer but it doesn't heat air. Its air temp thats important , That's why you have the thermometer in shade. Do that, see where your at and if needed look at making some modifications.
 
New Age United

New Age United

Well-Known Member
Mr Blamo said:
Buy a good carbon filter though. The cheap ones at growlight.ca don't keep up with the smell.
Know this from experience.
Click to expand...
Is that right good to know. My buddies worked fine but his bud wasn't very dank. Can you suggest a better site that ships to Canada?
 
Aolelon

Aolelon

Well-Known Member
I keep mine at the canopy, Heat rises so the top of your tent is going to be way hotter than your canopy region, by as much as 5-10F
 
nonamedman420

nonamedman420

Well-Known Member
@coreywebster is correct with #1. grab a 1' square of styrofoam and put the probe for the thermometer in the center of it, sso it is completely surrounded by styrofoam. you get way more accurate readings that way, it falls right in line with my laser thermometer readings this way.
 
Dankestsmell

Dankestsmell

Well-Known Member
Okay, so far I have put it above, not directly under the light anymore **don't know why I would do that lol** it's most definitely reading cooler. I had made a diy customer active intake from the bottom. Made a home made ducting and connected it the a boX fan working absolutely great bringin in nice cold air from my room. Anyways I have this ThermoPro TP50 Digital Hygrometer Indoor Thermometer Humidity Monitor with Temperature Humidity Gauge https://www.amazon.com/dp/B01H1R0K68/ref=cm_sw_r_cp_apa_i_O3ScBb1CX0S7W

I bought it just too see a rough reading if how hot I'm running. Thanks guys for all the help I will inform you of the tents temperature later on
 
Dankestsmell

Dankestsmell

Well-Known Member
Okay, So my Tent is Roughly 74.055 Cubic Feet. Could i use pc Fans to Suck air out could i get away with that for now? And how many would i have to use
 
SwiSHa85

SwiSHa85

Well-Known Member
4 Inch cheap duct fan. Do passive intake/exhaust. Suck hot air from the top which will pull cold air from the bottom up. They run about $15-20 bucks. My shitty Vivosun 4" has lasted 2 years now with no problems.
 
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