I have one here, but it’s way too humid for it to be effective.I love that! I've never seen a portable swamp cooler... where have I been...lol
Though today the humidity is lower or might work ok.
Here is a relative humidity chart for temps you can achieve.
So my temp is at 89F and 46% humidity so I can expect the temp to be reduced to 78F.
The big problem here is the swamp cooler increases the local air humidity and over time reduces its efficiency.
These are super awesome for dry desert conditions.
Temp Tax
Mugs Monday
Raven
Mr LC
They have all the sod there torn up. Brats!