The construction industry is responsible for 36% of the European Union's greenhouse gas emissions. The main goal of the EU in the last decade has been to boost energy efficiency and expand the use of renewable energy in buildings. Ground-to-air heat exchangers may be a solution to reduce the use of primary energy in buildings from nonrenewable sources. The study in this paper deals with an evaluation of the heating and cooling energy potential of a ground-to-air heat exchanger (GAHE), serving a pilot energy-efficient building in Romania. The research follows a comparison between the experimental behavior of GAHE, evaluated based on measured outlet temperatures for two full years, and theoretical behavior, assessed using two computational models following EN 15241:2007 (Model 1) and EN 16798-5-1:2016 (Model 2). A comparison is made between the energy potential calculated using temperature measurements and the energy potential determined based on calculated outlet temperatures using the two models. The assessment is performed as well for conventional climate corresponding to the building location.

建筑业占欧盟温室气体排放量的36％。过去十年中，欧盟的主要目标是提高能源效率并扩大建筑物中可再生能源的使用。地对空换热器可能是减少不可再生能源来源的建筑物中一次能源使用的一种解决方案。本文中的研究旨在评估地对空热交换器（GAHE）的供热和制冷能量潜力，该服务为罗马尼亚的节能建筑试点提供服务。该研究对基于连续两年的测得的出口温度评估的GAHE实验行为与根据EN 15241：2007（模型1）和EN 16798-5-1：2016使用两个计算模型评估的理论行为进行了比较。 （模型2）。将使用温度测量值计算出的能量势与使用两个模型基于计算出的出口温度确定的势能进行比较。还针对与建筑物位置相对应的常规气候执行评估。