Pereko KSR 3,9 is a boiler installed in central heating installations. The fuel used during the combustion process is eco-pea. It has a very simple to use controller with only 3 function buttons, which greatly simplifies the control and configuration of the boiler. Boiler backfilling container is located on its backside, which saves a lot of space. The front door has a possibility to turn it on the other side. The connections and the flue are located at the front of the boiler.