Helios is a brand new line of digital diffusers powered by ambient light. It automatically delivers just the right amount of warm or cool air using a unique digital logic system for more accurate temperate bands. Helios now comes with a wireless thermostat and postmaster for even greater control and comfort. One thermostat can power up to 15 diffusers in a single zone. Feel the difference in your comfort, see the difference in your energy bills. When it comes to VAV diffusers, it’s time to see the light.