Saving energy! When we bougt our house buikt 1971 in 1989 it used 40MWh for heating. I decided to do something about it. 1999 i installed 20 m2 of solar panels for heating and varmwater. These solarpanels are heating my house and the pool 6 month of the year. 2017 i installed 65 solar panels for electricity. They produces 15000 kWh/year and has so far saved 23,5 ton CO2.Thats like you have planted 700 trees! Now i hve changed windows and doors and i am insulating the facde with 240 mm more insulation. Lets se how much this will help the next winter.... Here is my solar panels https://monitoringpublic.solaredge.com/solaredge-web/p/site/public?name=Lindfors%20solkraft#/dashboard Mats L