Grow tent a/c or solution for high temps?

[Mikedin]

I keep my gavita temp sensor
And ac infinity temp/humidity on top of canopy, the gavita sensor has a plastic shield to block the direct light and get more of an ambient temp (according to gavita)

I use a piece of paper taped about 3-4” above the sensor like an umbrella to block direct light if I don’t it’s a huge difference in temp readout compared to the other thermometers I thought I was running too hot for awhile till I figured that out

 

[Eledin]

I have a 5x5 in a large bedroom that reaches maybe 72 on a hot day. I have a 6 inch fan and filter. I'm running a clip fan and a 10inch table top fan. The inside has good airflow and tried different fan positions. I checked this evening around 9:30pm and it was still 88 degrees with the ambient temp of 65.

Im sorry for using meters here but I dont quite get the CFM system and cubic feet since Im from Spain (I tried). If you have an exhaust fan that has lets say 300m3/h (airflow of 300 cubic meters per hour, change to cubic feet or CFM, its just and example) your intake fan should be around 25% less (because you have your exhaust connected to a carbon filter and also a tube that might bend) so that your tent doesnt inflate. You already have the exhaust and carbon filter so I guess you picked a filter that has more m3/h capacity than m3/h your exhaust fan has, to ensure that there's enough space for air to flow to the filter at the required rate and without impacting your exhaust fan capacity much and forcing the engine. In the meantime, point your clip fan upwards pointing to the lights to help move the heat to the exhaust fan. When its not too hot I just plug the intake fan and open the tent on the top, but many people will not be a fan of having their tent open. Anyway hot air goes naturally upwards because there is more space in between the molecules making it less dense, so its quite effective when you give it a push.

 

[jamesmost]

I use a piece of paper taped about 3-4” above the sensor like an umbrella to block direct light if I don’t it’s a huge difference in temp readout compared to the other thermometers I thought I was running too hot for awhile till I figured that out

White plastic cup from Costco

 

[Southernuncle21]

Odd I’m running the same light in a 4x4 I’m only at about 30% but I had it crankin during the last run she does put out some heat for sure, but I was able to handle it with just a 4” spiderfarmer exhaust and carbon filter, my sensor will read 90 if I don’t post a mini hood on it to block the light from hitting the sensor directly, can you give us a temp sensor location?

Here’s a photo since the video isint working


That little white square of paper floating back and forth is just a 3”x3” paper square I cut a slot in the middle and slid the sensor through it then tape it so it dosent fall down, I keep it about 3-4” above the sensor, if I don’t the exhaust panel will read 90 while my thermometers right next to it read 80
View attachment 1351042

I have the thermometer around the same height as the plants on the railing.