EC GPP Case Study: In 2018, the small town of Sulejów began a procedure to build Poland’s first ‘passive’ swimming pool – that is, a pool with ultra-low energy requirements for heating and cooling. This was achieved through a combination of high thermal insulation and air-tightness, as well as the use of heat-pump technology and installation of light emitting diodes (LED) lighting.The building was completed in March 2021, and the desired passive design standard has been achieved.