Energy factor
Encyclopedia
An energy factor is a metric used to compare energy conversion efficiencies
of appliances or equipment.
For water heaters
, the energy factor is the ratio of useful energy output to the total amount of energy delivered. A higher energy factor indicates greater energy efficiency.
Energy factors have also been used to compare relative efficiencies of washing machine
s using the following formula:
Energy factor = 392 x Volume (ft³) / Annual energy usage (kWh)
Energy conversion efficiency
Energy conversion efficiency is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The useful output may be electric power, mechanical work, or heat.-Overview:...
of appliances or equipment.
For water heaters
Water heating
Water heating is a thermodynamic process using an energy source to heat water above its initial temperature. Typical domestic uses of hot water are for cooking, cleaning, bathing, and space heating...
, the energy factor is the ratio of useful energy output to the total amount of energy delivered. A higher energy factor indicates greater energy efficiency.
Energy factors have also been used to compare relative efficiencies of washing machine
Washing machine
A washing machine is a machine designed to wash laundry, such as clothing, towels and sheets...
s using the following formula:
Energy factor = 392 x Volume (ft³) / Annual energy usage (kWh)