The energy conservation and carbon reduction project for Watson Hall included the dismantling of the original chilled water main unit, air handling units, cooling towers, and old pipes. It also involved the addition of one transformer, two outdoor units, ten indoor units, two heat recovery units, and three air purifiers. The project was completed and put into operation on February 20, 113.

The new equipment adopts a "variable frequency multi-unit air conditioning system" to replace the original "fixed frequency water-cooled screw chiller." This change reduces the maintenance burden of cooling towers and increases operational convenience. The new system uses the environmentally friendly refrigerant R410A to replace the old R22 refrigerant, effectively reducing carbon emissions. The use of variable frequency control instead of fixed frequency control is estimated to save about 50% in electricity consumption. Coupled with heat exchangers and air purifiers, the system filters PM2.5 and has sterilization functions. It also automatically adjusts the intake of CO2 to maintain the air quality in Watson Hall. The current feedback from teachers and students regarding the new system has been positive.