Dinos wrote:
A heat pump - to which Elko refers - is like a split AC unit but with a reversing valve that allows you to operate in heating and cooling modes. These units are not very efficient in the heating mode when outdoor temperatures drop to about 45 or so degs F and below. They should probably do for the most part in Cyprus, but check manufacturer specs / an a/c specialist to be sure...
Dinos, you must be living in England otherwise you would not be talking in Fahrenheits
That means 7.2 degrees Centigrade. It is true that a heat pump does not give high temperatures like an electric heater and as the outside temperature falls, the warm air pumped into the room becomes luke warm. Still it is good enough for Cyprus and much cheaper to use than electric heaters. The ones I use in my house gives 3.25 times more heat compared to an electric heater for the same amount of electricity consumed. What is more I use them in the summer for cooling.
Gas and fuel oil is too expensive in Cyprus for hot water heating systems to be economical. I know many who installed these systems but cannot afford to use them. The most sensible thing would be to use sunshine for heating the houses coupled with better insulation. Once I thought about applying this system for my new house in Famagusta but then I thought I would not be able to find the right craftsman to execute my plans. The idea was to have glass panels on the roof and have the air circulated into a pit full of gravel in a closed circuit. Some of this hot air would be used to heat the house daytime and the heat energy accumulated in the pit would be used to heat the house after sunset. I believe they have these systems in California in the States.
Here is a business idea for young and upcoming engineers.
ismet