Submitted by elsbeth on Wed, 2009-10-28 12:36

 How much can I save with a solar water heater?

 

Assuming approximately 3 m² of solar collectors, annual savings for an average household of up to four people are estimated at 150 to 200 m³ of natural gas, which corresponds to 40% to 50% of the gas or electricity used to heat tap water. An annual saving of around € 70.00.