My research interest includes sustainable technologies and environmental systems. I am particularly fascinated by the potential for sustainable technologies to enhance human living conditions and protect the environment in the building sector. I am interested in studying how heat exchangers, such as ground heat exchangers, earth–air heat exchangers, U-tube borehole heat exchangers, and energy pile heat exchangers, can create effective, sustainable systems and technologies. I have also conducted research on net-zero-energy buildings, minus-carbon and plus-energy houses, passive ventilation, heating and cooling systems, radiant heating and cooling systems, and vacuum-insulated panels.