 Accumulated thermal unit

An Accumulated Thermal Unit (ATU) is a unit of measurement used to quantify the total amount of thermal energy (heat) that is accumulated over a specific time period. This concept can be relevant in various fields, such as environmental science, HVAC (heating, ventilation, and air conditioning) systems, and energy efficiency studies. In the context of energy management, ATUs can help track the efficiency of heating systems or the thermal performance of buildings.