2.5 ton AC in a larger house
the house is roughly 2400 feet, its well insulated, in Alberta, not much humidity and we don't get super hot here.
the price is good, but im worried about buying something that is just not going to get the job done. I don't want to replace furnace and duct work, as that's working fine, the house is 9 years old.
so lets say its a 29 degree day, and 15 overnight, and I set the ac to keep the house at 21, what can I expect here, the house to stay at 21? increase to 23-24? increase to 27?