A system for detecting and cleaning air pollution in indoor space with heating, ventilation and air conditioning includes one or more outdoor gas detection devices, several indoor gas detection devices, several filtering devices, and a central controller. The central controller receives air pollution data detected by the gas detection devices, by connecting to a cloud device, performs an intelligent computation and comparison on the air pollution data to locate an air pollution location, and the cloud device transmits a control command intelligently and selectively to the central controller. Therefore, according to the control command, the central controller controls the air conditioning modulation mechanism of one or more HVAC components and enables the filtering devices to generate a directed air convection, thereby achieving the filtration of the air pollution to allow the indoor air pollution data to be a safety detection value.

The ordering or staging of packaged units corresponding to an array thereof includes detecting environmental conditions proximate to the array, selecting a calculation for ordering the packaged units based on at least one of the detected environmental conditions, executing the selected calculation for each of the packaged units included in the array, and ranking the respective packaged units based on respective results of the executed calculation. The selected calculation for each of the respective packaged units factors an operational coefficient, a weighted value of a detected runtime, and at least one of a detected intake air temperature or a detected wind speed