Are you spamming by forgetting the link? What software? What are you causing? Here is a comparison of the cost of energies: https://www.econologie.com/chauffage-comparaison-du-prix-des-energies-telechargement-3584.html You don't feel stupid doing "advertising" while confusing kW (unit of power)...

Hello, It is very difficult, without being a specialist, to have a precise opinion on the interest of a system using so-called renewable energy. We must not forget what Lavoisier said "Nothing is lost, nothing is created, everything is transformed" Heat cannot be "pumped&q...