Isomäen jäähalli, also known as Enersense Areena for sponsorship reasons is a multi-purpose arena located in Pori, Finland.

The following year, the B-series matches of the World Hockey Championships in Finland were played on this rink.

There were no seats at all in the arena, and the ice was surrounded on three sides by a partly wooden standing auditorium.

In the past, the teams had had to change their equipment in the Pori Stadium a couple of hundred meters away, and walk from there to the arena.

In the spring of 1978, an all-time record was seen in Isomäki, when the decisive final match of the Finnish Championship League between Ässät and Tappara was crowded to be watched by an estimated 13,000 people.

With the new east-facing seating area, the audience capacity of the Porin jäähalli was reduced to 7,500 spectators.

Additional seats were built and the wooden standing auditorium was replaced with a new concrete structure.

At the same time, a second floor was built in the arena, which included new restaurant, sales and sanitary facilities, as well as modern benches.

[8] The arena can accommodate 6,350 people after the latest renovation.In 2022, when the club ran into financial difficulties, the City of Pori bought the shares of Kiinteistö Oy Porin Jäähalli owned by HC Ässät Pori Oy, after which the city owns the arena alone.

[12] In 2023 after a successful season, the arena got a new jumbotron and new sound technology – increasing the amount of speakers from ten to 130.