Students of Ludvigsbergsskolan have complained that it was cold in classrooms during winters, but actually the energy consumption (electricity and district heating) of the school has been already very high. So energy audit is required and aim of this project is to find out how to improve the indoor climate of Ludvigsbergsskolan(http://www.skola.gavle.se/ludvigsberg/) which is located in Valbo, a city on the Sweden east coast and at the same time. Achieving this goal is not by increasing district heating demand but by some energy audit methods. Front part of the building has 2 floors, and the left part has one floor. The whole building is composed by classrooms, offices, gymnasium and dining-room.

First, data related to energy is collected, such as installed power of facility, power utilization factor and the running hours of these facilities. Then, calculation can be taken to decide if the building is working properly and healthy. At last, present and discuss the situation, suggestions to improve energy condition are offered.

Total demand of District Heating in year 2006 is 1088 MWh, and electricity is 304 MWh. Problems for this school need to solve is too cold in winter and to hot in summer.

In this article some suggestions are made to save the energy consumption and work out the indoor climate problems. After all processes is done and evaluated 10 MWh electricity and more than 300 MWh district heating could be saved.