Recently, I was in Invermere again and I visited a friend’s house with a unique take on solar air heating. He has coined his invention the Solar Coffin. This device heats air up to well over 100 degrees C within the “coffin” unit. The air is then moved under the slab of his house which stores the solar energy for release during the winter. This system is based on a system called annualized geo-solar developed in the US as a strategy to get off the grid. Take a look at the video below and let me know what you think!