Helios is powered by both ambient light and direct sunlight. The variable air volume (VAV) diffuser can be used with thermostats and is completely wireless, enabling maximum comfort, greater efficiency, and simplified installation. Typically, VAV diffusers must be connected to an outside power source such as a building’s power supply, leading to decreased energy efficiency. Beyond the energy losses, the connections create headaches for contractors because they also require cables and cords that complicate and hinder system installations. Helios eliminates both of those issues because it’s wireless and is equipped with a solar cell that can be charged by ambient light and direct sunlight.