There is full focus on making the best possible use of district heating in the approximately 400 apartments in Sønderborg Cooperative Housing Association’s Kløver-/Hvedemarken department. The goal is not only to use heat more sustainably, but also to help residents save money on their heating bills. All with the help of a heat exchanger and measures to motivate residents to conserve heat.
Before the project started, the heat from the radiator was sent directly back to the district heating, with the result that residents’ heating bills were often surcharged because the return water was hotter than the utility company’s recommendation. Today, the return water is sent down to the basement past the hot water tank, where the high temperature helps to heat domestic hot water. This provides an extra good and more sustainable utilization of the district heating, while the residents do not have to pay an additional fee to the district heating company, as the return water has removed the heat.