Building energy consumption has presented itself as one of the biggest proportion inenergy industries. Focus could really be placed on this field with a view to conservingenergy. One popular way to achieve ideal energy identification is to conduct an energyaudit. An energy audit is of interest in pinpointing energy losses. For small households,it could be a way of reducing energy spending, while for large companies it could beone crucial way to decrease energy expenditure and improve efficiency in operation.The Brynässkolan has been in use for many years and performing the audit is anattempt to increase its energy efficiency and ultimately cut down cost. Byinvestigating the school building’s climate envelope and lighting and measuringventilation unit we gained knowledge about its energy losses. We came up with someenergy-saving plans, among which some are inapplicable, the others are feasible.Finally some constructive suggestions are presented to the school administration.