Here in Houston TX 200a 120/240 is the norm, although 400a service is not uncommon. AC is the main load. We use it almost year around. We only have 30-45 heating days a year, some years more some less. Natural gas is the most common with electric a common second. Most homes with gas use it for water heating. As new technology comes to play, more homes have instant water heaters, ether gas or electric. Heat pumps are also more common with ether gas or electric as a backup. Robert
