A product devised for the purpose of implementing phase change material solutions inside of heated and cooled spaces, including but not limited to commercial building, cold storage facilities, freezers, and other temperature controlled environments. The ATD’s design allows for maximum airflow across phase change material filled chambers causing increased productivity of the phase change material
 
The ATD, when positioned within or next to the HVAC ducting or heating and cooling mechanism within a given space, can maintain that conditioned space at a desired temperature for prolonged periods of time without the use of heating and cooling forces, and it can perform this function more effectively and efficiently because of its proximity to the conditioned air emanating from the ducting or the heating or cooling mechanism of the air conditioning system.