Drain a quart of water from your water tank every 3 months to remove sediment that impedes heat transfer and lowers the efficiency of your heater. The type of water tank you have determines the steps to take, so follow the manufacturer's advice. If you heat with electricity and live in a warm and sunny climate, consider installing a solar water heater. The solar units are environmentally friendly and can now be installed on your roof to blend with the architecture of your house. Take more showers than baths.
Bathing uses the most hot water in the average household.
Consider the installation of a drain water waste heat recovery system. Indoor Lighting Tips Turn off the lights in any room you're not using, or consider installing timers, photo cells, or occupancy sensors to reduce the amount of time your lights are on. For example, use fluorescent under-cabinet lighting for kitchen sinks and countertops under cabinets. Use 4-foot fluorescent fixtures with reflective backing for your workroom, garage, and laundry areas. Both lights are much more efficient than their incandescent counterparts.