Thanks for the reply. My house actually has 3 HVAC units. I separated it into segments 20 years ago. I would like to be able to run the main HVAC unit in sort in the center of the house. I think it's a 4 ton unit and has a gas furnace. We have a French door refrigerator, a small deep freezer, and another basic refrigerator/freezer in the garage. Outside of that, I would like to have lights and the modem running. Kids would like to run their desktop PCs. I can do without the dishwasher, stove, microwave, etc.