Water Heaters Benefits of Energy-Efficient Water Heating If your water heater is more than 10 years old or is reaching the end of its useful life, consider upgrading to a newer, more energy-efficient model. High-efficiency water heaters can lower your water heating expenses by up to 40 percent or more. Benefits of energy-efficient water-heating equipment include: Profitability — upgrading to efficient models can lead to long-term reduced energy costs, freeing up cash to reinvest into your business Maintenance Time — newer equipment can reduce maintenance time and costs by extending the lifespan of your equipment Comfort — energy-efficient equipment is key to maintaining a productive and comfortable work, guest, or tenant environment