Within the scope of the project UPMEF a number of municipal properties in Eskilstuna have been equipped with the main aim of saving energy but with a clear focus on the whole, where soft parameters such as well-being, well-being, safety and security were also included in the work. The initiative aims to contribute to the fulfillment of Eskilstuna's climate goals, but also to raise the standard of the indoor climate and thereby achieve satisfied and well-being of staff, users and customers.

One of the properties within UPMEF located in the West is the Munktellarenan, and the following improvements have been made there,

• The heating systems have been regulated, so that all spaces get the right temperature
• New ventilation units have been installed
• The ventilation has been regulated to obtain the correct air flows
• In the connecting corridor, electric radiators were replaced with water-based ones to reduce electricity use
• Entrance locks are rebuilt to minimize cold drafts
• Windows and window sections have been replaced, and in some parts of the arena, windows have been rebuilt on the inside with insulation and cover sheets to minimize energy loss
• Remaining existing windows are renovated on the outside
• The property's control system, which optimizes energy use while maintaining a good indoor climate and reads indoor temperature (heating and fan), was replaced
• Older energy-consuming pumps in heating systems were replaced with new energy-saving pumps
• The house was drawn up with updated A drawings as the house looks today