How much would a costantly-on AC cost?
September 5, 2011 10:46 AM Subscribe
Can you calculate the electricity usage of one AC in one room and the percentage it would be in terms of the electricity bill?
posted by atetrachordofthree to home & garden (14 answers total) 1 user marked this as a favorite
My two roommates and I get along superbly well, and we are in a 3 bedroom apartment.
We have an AC in the living room/dining room/kitchen (which is kind of a big, open, square space), and roommate A has an AC in her room. Roommate B and I don't have AC, but we use fans.
When roommate A installed the AC, she had agreed that she will contribute more to the electricity bill, since her room will be using more electricity than ours. But roommate B and I soon find that she leaves her AC on 72 pretty much all the time, even when she is out of town for 3 or 4 days. She told us specifically to not turn her AC off. She sometimes leaves the door open hoping that the cool air will get to us.
The living room AC is on a lot these days, too, but at 78 degrees, and it is off when we all leave the house. The AC is 8000 BTU and we have about 300 square foot of space.
I would like to know if there's any way I can calculate the electricity usage of her AC? I know the square foot, the exact model of the AC. She keeps it on 24-7, at energy saving mode, at an average of 72 degrees.
I want to get a sense of how we should divi up the electricity bill-- I don't want to charge her by the volt, but if her AC is costing as much as the rest of the house, then obviously contributing a few buck more would not do.