Free beta
Know your closet's heat load before you rack the switches
Enter your switch count, active PoE ports and power supplies. Get minimum, expected and maximum BTU/hr, cooling tons, and the amps you need at 120V, 208V and 230/240V.
Free while in beta. Just sign up with your email.
Built for switch stacks
Ports, active PoE ports, PoE class, PSUs and PSU wattage per switch, multiplied across every switch.
Min, expected, max
Idle draw, real PoE load, and the N+1 worst case your power supplies can actually deliver.
Electrical load
Amps per switch and in total, plus the circuit size you need under the 80% continuous-load rule.