Sunlight is only present for a little time. As a result, a storage device is frequently needed to harness solar energy throughout the day so that it can be utilized in a variety of ways at night. The thermal insolation energy can be stored in a variety of ways depending on how it will be used. Space heating is a basic requirement of people who live in hilly areas during the winter. In certain areaswinter nights are too chilly for people to feel comfortable. This problem may be resolved by a mechanism for heat absorption that uses a photovoltaic solar air preheater and a daytime energy accumulation mechanism using [PEC]and provide comfort at night. For space heating, parameters relating to both replenishing and disposing of charge in[PEC]s must be adjusted. For a room heating application in Uttarakhand's hilly regions, the currently ongoing study investigates the enhancement of numerous key parameters of a mechanism for heat absorption, including [PEC] size, rocks dimension, the flow rate of air during charge accumulation in[PEC] , cycle time during [PEC] charging, and the desirable comfort inside a closed volume. There are four occupants and a 64 m3 volume in the room.For the purpose of researching the charge replenishing and disposingattributes of [PEC]s, a MATLAB computer algorithm has been developed. The algorithm is verified with earlier study data. The outcomes reflect that a [PEC] with a better design might offer soothing overnight warmth.