In this review paper it is discussed about how an IoT can be implemented in the refrigeration and air conditioning to save the energy at different climatic problem. We will be discussing about the knowledge of sensor, actuators, and other objects which are connected to Internet and application of IoT. While using IoT in the application it will sense the different parameter like temperature, voltage etc. and maintain the feasible condition in order to save the human time. Now-a-days industries are also using IoT to get the better results. The use of IoT is implemented in industry as well as for household purpose. In this paper, the brief description about the application of IoT in different climatic conditions and how it is beneficial for the human comfort and also how it can reduce the wastage of energy.

In this review paper, we mainly focus on the working of air conditioner and the required development needed for the sake of human comfort. Day by day the requirement of air conditioner is increasing because the temperature is increasing rapidly. Along with the air conditioner the quality of the air must be improved in order to sort out health related issues.Impurity of air is increasing due uneven human activities. In order to purify the air, the air conditioner must be developed in such a way that different type of filters such as Manganese Dioxide filter, HEPA Filter, Electrostatic Filter must be attached to trap various types of pollution causing elements. In order to kill germs, the UV radiations must be introduced to kill the disease causing germs and pathogens for the sake of purification of air. Along with the purified air the energy must also be used efficiently, for that, IoT must be implemented to ease the work and to save energy.