The idea is to have a water cooled server farm (yes this is expensive and potentially hazardous to a mainframe's health) and have it exchange heat with a large water reservoir for a laundromat.
The laundromat could use the excess heat to preheat water for washing machines.
The water reservoir could also have a heat sink attached to some part of it to preheat the air that goes into the dryers as well.
Keep that laundromat open 24/7 and get PAID to cool your server farm.
Step 1 Edit
Find the solution of water-cooled server farm.