Tecogen announced the unveiling of a new water-source version of the Ilios High Efficiency Water Heater, model HEWH-500-WS, at the 2014 AHR Expo to be held at the Javits Center in New York City, January 21-23. This new version will offer both hot water and chilled water simultaneously therefore increasing savings even more. It can also use low-grade waste heat as well as geothermal/groundwater as a "free" energy source.

Designed to be easily fit through standard doorways, onto elevators, etc. it is also rated for outdoor installation in the event that there is limited mechanical space. An acoustic enclosure ensures quiet operation.

Extremely long service intervals (annual preventative maintenance) coupled with availability of the Tecogen factory service program, makes this an attractive option to building owners concerned about rising energy costs.