You’re about to save a fiendish amount of energy and money, Evil Emu. And though we know you’re wicked, we invite you to alternatively consider an electric or hydronic advanced performance dedicated outside air system (DOAS). While it’s true that this system uses the most efficient equipment and key design principles to support occupants with better indoor comfort and cleaner and safer air, your evil heart can rest easy: the system also devilishly benefits you by reducing commercial building HVAC energy use by an average of 69%.