So I know these are very well recommended by the community but be aware... they hygrometer part is not at the probe end.
If you remove the black end cap it is just a thermistor. The hygrometer sensor is actually in the lcd display housing...
Just an fyi with the cheap probe meters.
This is your problem. Those are HIGHLY inaccurate and also very inconsistent.
Check out this.
https://www.amazon.com/dp/B07Y36FWTT/ref=cm_sw_r_apa_glt_i_JH3GS4V9YSH6Q8S0RM86?_encoding=UTF8&psc=1
$12 and its super accurate
so I have a 24x48 and I have 2 nozzles where the red V's are. the blue is the estimated area that I feel the misters cover easily. There is some overlap in the middle but not a lot and mostly just distributed by the turbulence that the mist creates with the warm air.
If I were to add 1 more...
https://www.lowes.com/pd/48-in-x-8-ft-Embossed-White-Wall-Panel/1000174771
It is rigid and comes in 4x8ft sheets. This is all I'm finding on their website... sometimes their website is not so great to search for things.
Another thing I consider doing if I could not find the PVC was to use 1/4in plywood and then glue a sheet of the "wall waterproofing" that home depot and lowes sells to it. Its like a 1/16" or am 1/8" thick impermeable plastic sheet. Sold, in my lowes at least, with the paneling, like the...