Trying to find the right dehumidifier for a 5x5 grow tent.

Hey folks,
Looking for a dehumidifier that can treat a 5x5 tent effectively. I'm on a budget though, no more than $75. I found some used ones in that price range, but that's an as is sale. Do I need to treat the grow tent or the room the grow tent is in? The room is roughly 12x12, but it has a built-in window A/C, which has humidity usually at 50-55%. Lights out, though, my tent quickly rises to high 80's. Lights on in the tent, it's 45-55%.

I'm not sure why it goes so high. I have a 6inch fan venting outside at full speed, and a 4 inch fan venting into the tent at full speed, air which has been treated by the A/C.

For the time being, I have a space heater in the room with the A/C on. I was able to bring the humidity down to 55% (and dropping) while the temperature hasn't risen too much. That space heater is probably 2400watts though, so not a long term solution.

I'm also looking at this: https://www.amazon.com/LUOYIMAN-Dehumidifier-Electric-Operation-Sterilization/dp/B07867SVJH/ref=cm_cr_arp_d_product_top?ie=UTF8 but it comes with a UV light that treats the air, I'm not sure what wavelength it is and if it would bother the plants at lights off, were it in the tent.

I put a home security WiFI camera in the tent that has night vision so I could figure out what was going on without bothering the plants. I was hoping it was just peaking high 80's right after lights off and then dropping back down, but nope, I was able to confirm it wants to stabilize in the 80's. I have my hydrometer just above plant canopy.

Any suggestions are appreciated!

https://www.amazon.com/dp/B0787CRMJS/ref=sspa_mw_detail_1?psc=1

I wouldn't use that because of the light, this one has a green light which is what you need, it should keep a five by five under 60 (I use it in a five-by-five) and one in my drying area too
-good luck!

Thanks for the suggestion. That thing is awfully small! I'm going to bookmark it. Helps to know it was suggested by someone growing in a 5x5 as well. And the price is right! Does it still function fine with all of your fans running during lights off?

For that price you could get two and still be under budget (you might need two?) You might need another one in your drying room at some point ?

It functions fine with my 9" floor fan, you can feel the air coming out of it strong, I put it in a corner where it's not directly hit by the fan

That unit with the UV light has the light inside to sterilize air passing through the unit. Not going to be shining UV into peoples eyes.

Relative humidity is relative to temp and when your temp goes down the RH # goes up even tho there is the same amount of moisture in the air. Just a lower temp.

gjs4786 said:

Thanks for the suggestion. That thing is awfully small! I'm going to bookmark it. Helps to know it was suggested by someone growing in a 5x5 as well. And the price is right! Does it still function fine with all of your fans running during lights off?

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So yesterday the humidity was 70s and 80s all day I checked the little humidifier in my tent it lowered it a few percent below ambient

normally it keeps it under 60 when the humidity reasonable but yesterday's humidity I don't think much would have helped, just wanted to let you know it's not the end-all be-all but in general it works keeping it below 60 pretty well in normal conditions

Also have a different brand but it looks exactly the same and it has the same specs as that one so I'm assuming it's the same manufacturer but not for sure