Hello bro.
By the time we get our climates where we want em, most of us could get second jobs doing HVAC. Ha.
I'm also drawing from and venting to the same space. Luckily it's 25x25 feet. 7.5x7.5m.
I was using a humidifier(winter) when I started my seedlings. Now my girls are big, (summer) and my ambient RH has been in the 60's.
6 Flowering now. Sweating it out, literally. Lol
New, nasty. (second large one !) dehumidifier arriving Wed.
Extracts up to 70 pints a day. 33 L! :[emoji5]
225$[emoji52]
But, about your heat.
This might not be applicable to your situation, but could you install something like this?
If so, maybe you could put a box fan on the floor, outside the door drawing heat out?
I will keep thinking....... keep after it, homie !
Good luck.
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Bi-fold Closet Door Plantation Louver-Louver White, Doors, by Kimberly Bay
$74.00 · Houzz
+$4.62 tax and $50.00 shipping
Jah Strength
mg
All are invited to check out my current first grow. [emoji271] Mephisto; DP.
https://www.autoflower.org/index.php?threads/59051/