Multizone to Variable Volume Control Retrofit
Multizone air handling units are older units that are still prevalent in the DoD. This retrofit converts a pre-existing constant volume multizone system to a variable volume (MZ-VV) multizone. The technique makes changes in instrumentation and uses a novel control scheme to reduce energy consumption by reducing simultaneous heating and cooling and excess airflow to satisfied spaces. The retrofit is significantly less expensive and less disruptive than a full system change-out (to VAV) that would require demolition and installation of ductwork and terminal units.