ABSTRACT
Earth–air heat exchanger (EAHE) system is the system that fulfils such criteria. In India, the utilization of an EAHE system is limited, and it is rarely used in residential buildings as people have reservations on several aspects of the system. The EAHE system is considered suitable for residential, commercial, and industrial buildings having some open area for the construction of the earth–pipe–air heat exchanger tunnel system. Consumption of energy within the houses and buildings for providing cooling and heating comfort, is escalating continuously, and owing to changing climatic conditions, the demand of low-energy techniques is also growing. Highland climatic conditions represent the northern-most part of India. In this area, the climate ranges from nearly tundra the snowline to tropical in the foothills. Subtropical humid climatic conditions persist in majority of north-eastern states and most of north India. Arid climatic conditions prevail in majority of the extreme western parts of Rajasthan and Gujarat in India.
