HVAC & Water Heater Energy Efficiency Calculator

How much money will a more efficient appliance save me per year?

The calculator converts each appliance to annual energy as kWh/yr = (watts x hours/day x days/yr) / 1000, then multiplies the kWh difference between the old and new unit by your electricity rate. For example, replacing a 1500 W unit with a 1000 W unit running 5 hours a day, 365 days a year, saves about 912 kWh, or roughly $110 at $0.12/kWh.

Related questions

• How is the CO2 reduction estimated?
• What electricity rate should I use?