Wrap your hot water heater with insulation. A hot water heater uses 12 to 15 percent of a typical home's energy. Completely wrap electric water heaters, but wrap gas water heaters on the sides only. On gas heaters, make sure that the pilot light's access door isn't covered or that air isn't blocked from the burner. Change the filter on the heating unit often.
Dust can restrict air flow and increase operating costs.
Fix leaks, especially hot water faucet leaks. Hot water leaks make your hot water heater operate unnecessarily. Many of the same principles for home energy conservation also apply to other structures. If the structure isn't well insulated, consider adding insulation based on recommendations for the particular structure. Make sure the structure is ventilated properly for more efficient fuel use and for safety reasons.