Window unit heat pumps are basically not available (Carrier doesn't appear to offer any either after a brief search). There are a lot of people who would repla

Window unit heat pumps are basically not available (Carrier doesn't appear to offer any either after a brief search). There are a lot of people who would replace an air conditioner with a heat pump who can't afford a full house heat pump. Until you give them reasonably priced window unit heat pumps they are going to continue heating their homes primarily with #2 fuel oil. That will require mass production of smaller heat pumps and competition to bring the price down.