(EN) The present invention describes enhancementof non-solar water heating systems (such as systemsthat operate on gas, diesel fuel, or electricity energy) towork with solar heating panel as well. The retrofitable systemaddresses the need to provide a simple to install,cheap, and clean add-on solar panel and parts to existingnon-solar based heating systems. The hot water extractedfrom the system has homogeneous temperature, and whenwater is not taken from the system the hot water are beingcollected in the existing boiler.
