153 heat interface units for new construction in Berlin
Project Description
Watts Industries Deutschland GmbH is supplying HIU2 HKM heat interface units for decentralised domestic hot water and space heating in a new residential building with 153 apartments. The building is located in Berlin's Marzahn district, in the eastern part of the city, which has about 270,000 inhabitant. The building, constructed to the KfW 55 standard, consists of 153 rental apartments, 84 of which are designed to be barrier-free. It is connected to a district heating network.
The HIU2 HKM units used have a domestic hot water tapping capacity of 12 l/min and are combined with heating manifolds for underfloor heating.
System Functionality
Here’s how it works: The heat is provided centrally – in this case via a connection to a district heating network. The heat interface units installed in each apartment transfer the heating energy to the underfloor heating system, while domestic water is heated decentrally using the instantaneous water heating principle. Water is only heated when needed, so there is no need for storage. This approach offers multiple benefits: it meets the highest hygiene standards for drinking water. Additional legionella protection measures are not required, and compliance with the German Drinking Water Ordinance can be achieved without additional cost. The domestic hot water is precisely temperature-controlled, and the underfloor heating provides pleasant, even heat. The housing association also benefits from the easy and therefore cost-effective installation and low maintenance of the system. For rented apartments, it is also advantageous that consumption can be recorded individually for each unit.
Installation of the Heat Interface Unit
The heat interface unit is installed together with the stainless-steel manifold in a suitable flush-mounted system cabinet. One advantage of using the cabinet is that it can be installed during the shell construction phase thanks to a pre-assembled ball valve strip. The HIU itself is then installed later, after the walls and floors are finished.
Heating Distribution Components
The HKV2013A stainless-steel manifold ensures heating distribution via an underfloor heating system. It is controlled using 22CX actuators and the WFC-03 H+ control unit.
Location
Berlin-Marzahn
Application
Decentralised heating distribution and domestic hot water heating
Scope of the project
Supply of 153 home stations for an energy-efficient new building
Timeframe
May 2025
Links to the products used
Heating circuit manifold HKV2013A VA for HIU2