how many watts will a house use
Average rate for a house in the US is 1200 watts. watts/hour is a meaningless concept. A rate of 1200 watts is 1200 joules of energy per second or 4.32 MJ per hour. That is equivalent to 1.2 kW-hours every hour. . The watt is a measure of power, i.e., energy per unit time. It is not the measure of energy used over a period of time. The appropriate measurement you want is power X time. For electrical use, the typical unit is kilowatt-hours. In my home we use about 10 kilowatt-hours per day.