Thanks for the eye, spy.
Trying to ween off the heater @ night. I thought if I pumped enough air in, during lights out, the humidity would stay down.
Maybe with all this rain, my intake air is damp.
Lights went off @ 33C humidity was 55
After four hours of passive exchange, humidity rose to 72 as the temp fell to 23C
View attachment 11862
I kicked on fresh air intake and by 5:30pm temp had falling to 18C. Humidity improved to 62%
The trend did not hold. By 8pm humidity was back to 70% , I had to start the heater cycling again.
Light on now.
View attachment 11863
Usually, with the heater cycling on 1, off 2 thoughout the dark, I can maintain 50% @ 27C. Kinda pricey; but it works.
I guess I am kinda lucky, to be in the desert.
With this much mass, I am quite powerless in influencing humidity.
The clouds will be gone soon. My dark temps may approach dry, 27 C's passively, in August, during the heat of the day. I will be serving up Taco's in no time.