ALPHA3 - easy hydronic balancing The ALPHA3 is our newest circulator for domestic buildings. It is of the renowned Grundfos quality and guarantees easy installation, world-class energy efficiency and reliable operation in the toughest conditions. For the ultimate benefits of the ALPHA3, however, installers need two other components รข?? the ALPHA Reader and the Grundfos GO Balance app. Together, the state-of-the-art ALPHA3 system helps installers complete a hydronic balancing incredibly fast and accurately.