im having a hard time explaining this, so im going to do my best. please feel free to ask questions on things that arent clear. i want to find out how much one would save on their electricity bill (from the lights and powering the AC to cool the room). ive already calculated the money im saving from the lights, but what about powering the AC? lets say i leave my lights on 24/7. the total power consumption by the lights is 1kW. would I consider that the rate of heat transfer (Qdot)? if i want the heat transfer (Q), i would multiply 8760 hr/yr * 3600 s/hr and get 31,536 kJ. is that correct so far? now if thats correct, this is where i reach a dead end. what other information am i missing to calculate how much the AC system is using per year? would i treat this as a refrigeration cycle, the room being the system?