In 2020, Folksam compared 68 heat pumps from 14 different manufacturers based on four criteria: efficiency, environment, function and warranty. They stated that the development in heat pumps has progressed rapidly compared to their last measurement in 2016. Today's heat pumps are more energy efficient and contain more functions.

The air source heat pump Hero is one of Mitsubishi Electric's best sellers and comes with a host of features that make life easier for homeowners. In addition, it is a product specially made for the Scandinavian climate and which has a very good operating economy and a long service life.