Air conditioning has always been taken for cooling in England. But the modern unit is capable of reversing to become a heater.
This is very important to understand. They will put out almost four times as much energy as they consume.
I.e. an air conditioning unit when burning one kilowatt of electric will put out 3800 watts of heat.
But an electric fire will only put out about 950 watts when burning 1000 watts (1 KW). (950x4= 3800.)
That means they give you heat at a quarter of the price.
Remarkable?
Well no actually. For at the heart of all refrigeration is a heat pump. It will pump heat in as well as out. It is not burning raw energy. You may know that a pond pump might only consume about forty watts whereas an electric fire several thousand watts.
There is a big difference between burning energy for heat and just running a pump.
You must also consider the spiraling cost of energy.
With the price of oil going to $140 a barrel and back the price is very unstable. there is talk of it reaching $200 by the end of 2009.
It might not run out in our lifetime but there is increasing awareness that we are using it up fast. This is helping to push up prices.
Then north sea gas is running low, we have recently laid an expensive pipeline to bring in gas from Russia. This all means huge rises in energy prices.
Gas and oil may dwindle but remember that electricity can be generated in many different ways, and from renewable sources.
Electricity will become the cheapest form of energy.
We can reduce you heating bills by up to three quarters even if you have gas central heating.