Hitaveita Sudurnesja was originally funded as heating plant in the narrowest understanding of that word. During time the company has changed and developed into multiple energy plant. The company produces and sells hot water and electricity. Also provides fresh water for the Suðurnes and Vestmannaeyja area as well as selling steam and earth sea to industrial users.

The company distributes electricity, hot water and fresh water on several areas, along with suage. The service is different between areas, below is an image that shows witch kind of distribution is on each area.