Tankless water heaters
A tankless water heater heats water as you use it, instead of keeping a full tank of hot water warm all day. That can lower energy use, though the savings depend on the model and on how your household uses hot water. When you compare models, look at the efficiency rating, the installed cost, and what the installation needs, such as venting and gas supply. We specialize in tankless water heaters and can talk you through the options.
Other ways to save energy
PG&E publishes current energy-saving advice for homes, and the major tankless manufacturers publish information on their own models.
Related: Hot water heaters and Water conservation and efficiency.