Natural Gas: Collective Annual Savings

If every California household upgraded to a... Energy Savings* CO2 offset Dollars saved Cars off the road
ENERGY STAR Qualified Central Natural Gas Furnaces 255 million Therms 1.4 million metric tons $230 million 235,000 cars
Energy-Efficient Gas Storage Water Heaters 100 million Therms 552,000 metric tons $91 million 92,000 cars
Energy-Efficient Dishwashers 254 million Therms

188 million kWh
235,000 metric tons $52 million 42,700 cars
Energy-Efficient Clothes Washers 7.8 million Therms

40 millionn kWh
61,000 metric tons $14 million 11,000 cars

* The savings estimates compare efficient models to conventional models of the same product.

** Figures based on $0.14/kWh and $0.90/therm residential rate.

Assumptions for Calculations

Example 1: Furnaces

If all California households with old, inefficient (80 AFUE) central gas furnaces upgraded to ENERGY STAR qualified models (90 AFUE), it would save 255 million Therms and 1.4 million tons of CO2 per year (equivalent to taking 252,000 cars off the road).

Sources and Assumptions

Example 2: Water Heaters

If all California households with old, inefficient (0.58 EF) gas water heaters upgraded to energy-efficient models (0.62 EF), it would save 100 million Therms and 552,000 tons of CO2 per year (equivalent to taking 100,000 cars off the road).

Sources and Assumptions

Example 3: Dishwashers

If all California households with old, inefficient (0.485 EF) dishwashers upgraded to ENERGY STAR qualified models (0.65 EF), it would save 254 million Therms and 235,000 lbs of CO2 per year (equivalent to taking 42,700 cars off the road).

Sources and Assumptions

Example 4: Clothes washer

If all California households with old, inefficient clothes washers upgraded to ENERGY STAR qualified models, it would save 7.8 million Therms, 50 million kilowatt-hours (kWh) and 61,000 tons of CO2 per year (equivalent to taking 11,000 cars off the road).

Sources and Assumptions