Effect of AC unit on humidity?
- Thread starter shiva71
- Start date
Hook Daddy
Well-Known Member
Yes, an AC unit will lower RH just like a dehumidifier.
HydroKid239
Well-Known Member
Correct. I do the same. Just recently acquired a portable ac that has 2 hoses. Will be fun to play with this summer.
shiva71
Well-Known Member
Cheers. But an ac unit has warm air coming out the back which needs ducting to remove it correct?
SheeshM
Well-Known Member
Yes, AC will cool the air and lower RH but in some cases you'll still need the dehumidifier. I had my tent in a hot attic for a few years and had to run a portable AC but still needed the DH. The tent would hit the desired temp, say 80 F, so the AC shuts off. Then, the RH rises when the AC is off which would kick in the DH. The DH would send warm, low RH air into the tent but now the temp goes back up! AC kicks on and the cycle repeats. I used 2 inkbird controllers; 1 for temp and 1 for RH and ended up with good control of temp and RH.
driver77
Well-Known Member
I have a portable AC unit in my grow room also, it has no active drain line and it doesn't lower humidity as much as a window unit seems to. It does have a dehumidify function also and a place to drain water from in that mode. Had to insulate the exhaust because it was so hot.
![20230531_074530[1064].jpg](/data/attachments/4397/4397455-0a4ce58221c3c781d37a858a068c159b.jpg)
HydroKid239
Well-Known Member
Yes, this one I have does. It's not a window unit. It's pretty cool though because it's been told to me that the moisture from the dehu evaporates. I kinda like the idea of that capability.
It has 2 ports in back.
This is the one I have..
seo_product_factory_title
Cooper&Hunter’s Dual Hose Portable A/C is ideal for temporary or supplementary heating, cooling, and dehumidification. Portables are often utilized during events, when spaces are more crowded than usual, and during construction or repairs of primary A/C systems. 12K and 14K Btu/h models are...
cooperandhunter.us
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HydroKid239
Well-Known Member
My humidity was 64% in my veg tent. I kicked the AC on and it went down to 47-51% within 90mins. (I’m using a window unit)
shiva71
Well-Known Member
Ok thanks thats a significant reduction in RH cheers!