We have a 50 gallon Rheem natural gas hot water heater. The gas is piped into the house by the gas company. It is the only gas appliance that we have. The kids are gone so wife and I are the only ones that use hot water. We do not try to save money by scrimping on hot water.<br /><br />The gas consumed is reported on the bill as CCF or 100 cubic feet of gas. Any idea of what would be the typical quantity of gas consumed in a month?