This is an industrial IoT system designed and developed for reducing the energy consumption of buildings. It consists of two main parts: A dedicated web based application (software) and hardware including gateway and smart engine room module that we designed and developed both parts. The system can be utilized using the web based application or as standalone. In standalone mode smart engine room module uses a sophisticated algorithm and via an external sensor that measures the outside temperature estimates heating/cooling demand of the building by considering the building parameters and subsequently tunes the setpoint of central boiler and chiller, proportional to the building heating/cooling demand to avoid energy exhaust for heating and cooling. In the web based mode, smart engine room module is connected to the web application using the gateway and subsequently to other SharifNCS smart devices, such as smart thermostats. This helps the smart system to better estimate heating/cooling demand of the building and subsequently reduce more energy for heating and cooling. In addition, using the web based application, remote operator monitors, controls and plans smart engine room module. Note that smart engine room module can be planed locally as well as remotely by the web based application.