Hello guys. I continue working on my thesis and this time my solar thermal panel HVAC system seems to be unable to heat my single thermal zone, instead it cools it even during winter. I'm using a water heater on the demand side as a storage tank with Heater maximum capacity set at 0. [This] is my .osm file. Any help is more than welcome.(https://www.dropbox.com/s/splxglt5k1rya0g/thesis%20new.osm?dl=0)