At 1155 GH/s, he has probably mined upwards of several dozen dollars worth of cryptocurrency this month. And an extra hundred dollars on his power bill, assuming it’s not included in his rent.

EDIT: mixed them up, Spoondoolies ones had a nice mesh but the Antminer ones don't behind the fans. That 1" of plastic must be enough to let a significant amount through (or the power supply wires still)