During the night (23:00 to 09:00), heat pumps stored cold water in the heat accumulator during the summer and hot water during the winter. A system that uses heated heat energy for cooling and heating of buildings by heating and cooling during the daytime

| Low-cost operation cost using late-night power: Using late-night power | 70% reduction compared to normal heating and cooling methods |
|---|---|
| Reduces power peaks, contributing to improved country and environment | |
| Using the government support system | → Installation support fund, tax deduction benefit, design incentive → Energy use rationalization funds available (low-interest loans) → Support system is also available for renovation |
| Eco-friendly energy use | Reduction of CO2 generation |
| Reduced operating costs by not installing a cooling tower | → No need for cooling tower supply water: Significant reduction in water prices → No sterilization and corrosion protection of cooling tower |
| Excellent load responsiveness | Firewater and other water can be used in case of emergency |
Egen Engineering Co., Ltd. can efficiently implement temperature stratification regardless of water storage type by utilizing patent technology and applied engineering technology for the first time in Korea.

| Maximize utilization efficiency of water storage | Maximizing efficiency through priority operation of water storage |
|---|---|
| Patent [Waterproof insulation and drainage construction of heat accumulator | Design and construction of 95% or more performance-guaranteed water storage Leverage complete design skills and simulations |
| Patent [Diffuser for Temperature Stratified Thermal Storage Tank] | - Leverage complete design skills and simulations - Efficient operation through Temperature stratification |