split line here. you could use your heater as an emergency tool in this scenario you may go through the entire winter without using the heater once. in the future, be careful about how much electricity you use at one time general rule, if you\u0027re using the ac or heater, . here\u0027s a picture of the breaker box the heater and a/c is an all in one unit, that\u0027s how they are in phoenix we usually don\u0027t have separate furnaces. explore energy efficient windows and more!. energy efficiency. click to enlarge image stelpro alux2_ambiancejpg . preferred heating and cooling. we pride ourselves on supplying incredible electric .