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. Typical 2KW electric patio heater will cost approximate 21p per KW per hour. LPG gas patio heater at max heat (13KW) will cost 16 per KW, turn it down to 7KW and the cost goes down to less than 11p per KW.In the same way as heating a building, electric heating is far more expensive than gas heating.t full power a 13kw patio heater will use less than 1kg of LPG per hour. Older 16kw gas guzzlers burn a great deal more. By fitting the latest high energy burners they'll give plenty of heat without costing a fortune wasting energy and money.