Seeing that my homemade air conditioner was not powerful enough to cool down the living room (it only had 2000 of the 14’000 required BTU/H), I took the copper coil off the fan, and turned it into a water cooled bed for the ferrets 
The bed holds a comfortable 16-18 degrees Celsius.
This is nice for the little weasels, seeing they can’t sweat to get cooler.
I made a sort of Homemade air conditioner today.
It’s based of a powerful fan (150 w, sounds like a large aircraft) and 5 meters of copper tubing in a coil mounted on the fan. Cold water (around 10 degrees Celsius) goes trough the copper tube at around 2 liters per minute.
I also added strips of 0,2 mm thick copper plating to help disperse the heat.
I measured it’s cooling capacity today at around 2000 BTU/H, but I’m going to reserve judgment until tomorrow (it will be around 30 degrees Celsius, just like today).
