I'm just starting to renovate a small off grid chalet in Northern France, including passivhaus insulation, zeolite-based recycling shower system, solar/batteries etc

Download my book for free at: https://1drv.ms/b/c/1f9f44c3a741b7f9/IQD5t0Gnw0SfIIAfxlEAAAAAAY-TblB1tCCO3knEM7ymHdI