Abstract: As we know refrigerator is a device use to keep items at respective temperature, generally at low temperature to preserve items and it is its main function. We have tried to make this device more versatile and efficient, by adding heat chamber. Heat chamber is an external chamber which is installed over our convectional chiller with the help of insulated pillars. We have installed an aluminium chamber over our chiller with the help of insulated pillars and we have wrapped this chamber via refrigerant flow tubes which are coming directly from compressor. Our study have found that refrigerant is compressed up to temperature 30-40 degree Celsius and this hot refrigerant is then allowed to flow through fins which are set at back side of refrigerator for lowering the temperature of refrigerant which is further expanded and allowed to flow through evaporator ( chiller).