Watt

Unit of measurement of power. Very commonly recognised in electricity but applicable to the rate of generation, conversion, use or dissipation of any kind of energy. For example, Tour de France champion Bradley Wiggins is quoted as saying that his strategy is to keep up a steady 400 watt output; an airliner on landing approach would dissipate kinetic and potential energy at a combined rate of (say) 20,000,000 watts.

Water conditioning

Techniques for suppressing the formation of limescale in domestic hot water (DHW) systems. Other than established chemical treatment such as ion exchange, various physical conditioning (e.g. magnetic and electrical) devices are available whose scientific basis is often not understood. Electrolytic methods have a known basis in science and polyposphate dosing is definitely effective. Read more...

Wind speed

Factor potentially affecting energy consumption in buildings but not easy to take into account because of compound effect with air temperature. More..