The efficiency of a water heater is measured by its Energy Factor (EF), which indicates how much of the energy input is converted into hot water. Factors that can affect a water heater's performance include the type of fuel used, the size and design of the heater, the temperature setting, and the frequency of maintenance.
A heater typically transforms electrical energy into thermal energy, which is then emitted as heat.
The original energy store used by a heater is electrical energy. This energy is converted into heat energy by the heating element in the heater, which then warms up the surrounding air or space.
When an electric heater is switched on, electrical energy from the power source is converted into heat energy, which warms up the surroundings. The energy store in the heater increases as it transforms electrical energy into thermal energy.
Electricity energy is converted into internal energy through work. As the internal energy of the heater increases so, too, does its temperature. Energy is then lost to the surroundings through heat transfer. The change in the heater's internal energy is the difference between the work done on the heater and the heat transfer away from it.
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Water heater is real danger, also is a waste of energy, solar energy water heater is able to avoid
Any heater that has the Energy Star label will be very energy efficient. The Honeywell eco line, for instance, are very energy efficient.
The total energy supplied to a patio heater can be calculated by multiplying the power of the heater (in Watts) by the time it is operated for (in hours). This will give the energy consumed in Watt-hours or kilowatt-hours.
The energy that is not usefully transformed by the fan heater is wasted as heat energy. This heat energy is typically lost to the surroundings and does not contribute to heating the desired space or object.
It converts electric energy to thermal energy
An electric fire converts electrical energy into electromagnetic energy. In the form of heat and light.