I’ve searched around and mostly seen people create custom radiator builds attached to their water supply, but that’s beyond my skill level and I’m not sure if linking it directly to the water supply via piping would violate the lease or not. Are there any solutions a bit more DIY that I could take advantage of?
Just run your shower with cold water. Open a window on the otherwise of the house and get a fan to blow air from the bathroom to the open window.
As the water turns from liquid to gas it absorbs heat. As long as it doesn’t get too humid it should feel cool.
Dehumidifier.
A dehumidifier would return heat to the room. Best you can do with swamp cooling is draw the humid air out.