In Spring 2016 Bryann Allen, Austin Anderson, and Solomon Clark from the Renewable Energy Student Union (RESU) proposed to replace the old natural gas water heater with an electric heat pump water heater with solar thermal coil preheating in the CCAT house. In total there is one outdoor unit and one indoor unit. The RHEEM hybrid electric air-to-water heat pump system provides hot water to both levels of the house. The electric heat pump and solar preheat system replaces the inefficient natural gas water heater which had a broken coil. By replacing the water heater and cutting out natural gas CCAT has moved closer to becoming entirely electrically powered, or a home that is “zero net energy”. This project was approved in December 2016 and originally allocated $9,000 for installation. Project installation was completed on February 15, 2021.