Industrial Air Handling Units Modular vortex air cooled chilled water heat pump unit compatible with fan coil and fresh air units The vortex module-type air-cooled chilled water (heat pump) unit utilizes advanced modular technology with air as the cooling and heating medium. This integrated central air conditioning equipment serves as both a cooling/heating source and combined unit, designed to work seamlessly with fan coil units, cabinet-type and ceiling-mounted air handling