A person who studies the origin of the words and its meaning is called an etymologist. Etymology is a branch of linguistics. I think all these are terms are named in English language, in every developed language there is a different term for each studies.
The wisdom of using an electric heater depends on the per kilowatt cost in your region. 1  If your heater has a 1000 watt rating and your cost of electricity is $0.15/Kwh your cost to operate for one hour would be $0.15. 2  If the element is activated 10 hours out of every 24 hours your cost per day would be $1.50.
A single bar electric fire often uses electricity at the rate of one kilowatt (kW) per hour. So, in an hour an electric fire will use one kilowatt hour (kWh). One kilowatt hour is also referred to as a âunitâ of electricity. In 2010 this cost an average of around 13p.