 But you're going to pay a lot of money for something that you're not using all year round. So most builders will not do something like that. When it comes time to replace your furnace or your air conditioning system, that's a conversation you need to have with your technician. Like Stanley at Heating Equipment Company, that's something he asked. How cold do you want to keep your house when it's being air conditioned? And how hot do you want it to be heated when you're heating?