How Much will it reduce your bills?

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It is hard to say exactly how much it will reduce your bills as this is dependent on the fuels you use and the efficiency of your water heating apperatus, however we can say that on average a correctly specified system will produce 80% of your hot water.

Not only does it offer massive savings on your fuel bills but prolongs the life of your boilers & immesions as they are only occasionally used to top up the solar heated water.

How Much will it reduce my carbon emissions?

Again it is hard to give an exact figure but as a rule of thumb you will achive approximately 500kwh per year of energy per 1m2 of solar panel with the average house will use 4m2.

With this in mind below is an average of co2 savings.

LINKS

http://www.energysavingtrust.org.uk/generate_your_own_energy/types_of_renewables/solar_water_heating