Mixed air in HVAC systems is the blend of return air from the building and outdoor air. Conventional control strategies waste significant energy by continuously maintaining the mixed air at a temperature cold enough to satisfy the building’s maximum cooling requirement. During most operating conditions this results in unnecessary overcooling, forcing the heating system to reheat the air to maintain comfort—a costly cycle of simultaneous cooling and heating.
The Perimeter’s Dirty Little Secret
Your thermostat kept the room perfect. Your heating valve had other plans. And nobody noticed — until the bill arrived.