What country are you in? How is your apartment wired as far circuits in say the living room (common U.S. practices are one maybe 2 different branch circuits in a livingroom and it all depends on when the place was built as to what size they are 15a/20a,  15a being the most common).

Dont let the numbers fool you.  Mining rigs are CONTINOUS DUTY and since that is so you will have to derate your branch circuits that they powered by.  The derating factor is 80%.  So a 15a circuit is ONLY good for 12a of continous duty! That is only 1440w at 120v and the includes ANYTHING that is powered on the same branch circuit also.

How do you plan on getting rid of the heat in your apartment during the summer?