johbee wrote:I've been involved in the construction of many houses. I currently live in a big old stone built house in Limassol. When I renovated and built on to it I put the provision for central heating, but I never installed it since I also put split units in every room. I simply use the split units for hearing and cooling. The provisions for central heating were a complete waste of money. I am now building a summer house where I will only put split units. Of course if you are up in the mountains you may choose to go with central heating, but let's face it: It doesn't get that cold in Limassol. My advice would be not to waste your money on central heating or such extravagance as geothermal. Very expensive. I will probably put some solar panels to help with he electric, but even the cost for these is over the top and will take many, many years to recover the initial investment.
geothermal can include a simple Air-earth heat exchanger, which consists mostly of an air-pipe from between 20 to 50 m in total length up to say 600m diameter buried at the lowest end at least 3 m down, where ground temperature is fairly constant: the intake is normally situlated in a well shaded area (behind a north facing wall): the larger the pipe the better the surface area and the slower the airflowf or better cooling .
The air is ducted into the house: one can either have closed loop system where the air is recirculated or an open system where the the air is then extracted, using something like a solar chimney - ie large diameter pipe in a sunny loaction, possibly painted black to warm the top, to induce an updraught. With a suitably baffled system one can have both.
Not sure what the underground temperature at about 3m depth is in Limassol, but bearing in mind that at that depth it does not change much in the year the temperature of admitted air should pretty constant and there could be cooling in summer and warming in winter.
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