Glacies developed a heating reactor that functions as a specialized heat pump that changes the pumped water into ice and the heat is released into the flowing air, effectively decarbonating the ventilation system. Glacies vision is to enable seasonal thermal storage: meaning using the passage of seasons (winter-summer) to store heat using the phase change properties of water. The reactor is producing ice as a by-product during the winter. That ice can be used during the summer to cool the mine. The mining industry is a good fit for Glacies seasonal thermal storage technology. The industry is looking for decarbonization solutions and a mining site is simply perfect for large scale energy storage using water. Glacies reactor can use the water stored in the settling ponds. The Glacies heating reactor can rapidly reduce by more than 70% the GHG emissions related to underground ventilation heating. The reactor is completely on the surface and will be fully automated. The only input is water, and the only output is ice (pumped as ice slurry). The reactor is very efficient, the annual coefficient of performance is above 15 (meaning we use 1kW of electricity to generate 15kW of heat). The payback period is relatively short for a decarbonization technology. For sites using oil, the payback is less than 1.5 year, for propane, it is between 3-5 years and for natural gas it is between 6-9 years. This technology is already incredible for all the advantages related to clean heating. When we use it as a seasonal thermal storage system, we can reduce the total cost and energy usage related to heating and cooling. This is our vision, using the passage of the seasons to store large amounts of energy.