So I have the worst heat/ac setup. I live in a townhouse 2 floors 1 zone heat/ac and the unit is upstairs on the 2nd floor. The problem is my living room is a step down with vaulted ceilings and a skylight that leave no place to hang a fan. The force hot air heat just will not warm the space. One wall is an interior wall and there is a fire place that puts off no heat at all unless you are sitting a foot and 1/2 in front of it. The room has hardwood on concrete floors.Plus there is a 9ft sliding glass door. Which is almost 1 whole wall. I buy a new space heater every year hoping it will be better than the last. please please help! any suggestions? room is about 18ft x 11ft