HP4All brings together leading experts across Europe to enable capacity and skills development within the Heat Pump sector and to ensure that the energy efficiency gains afforded by heat pumps are realised. HP4All, following a a holistic, systemic point of view, will work both with the supply side (manufacturers, SMEs, installers etc) and demand side (building owners, public sector etc.). This way, the project will enhance, develop and promote the skills required for high quality, optimised Heat Pump (HP) installations within residential/non-residential buildings bringing Europe to the forefront of the climatization sector. HP4All will develop the HP4All package, a set of different tools and resources to be used by the different related stakeholders. The package includes a HP Competency Framework to facilitate Mutual Recognition of HP Skills and, from an end user perspective, a HP Knowledge Hub will be created to provide guidance, support and tools e.g. procurement guidance to increase the demand for HP skills and knowledge. HP4All will validate this package through 3 regional plans being implemented (AT, ES and IE) with the ambition of driving market change, influencing end user decisions and planning for new innovations. The implementation plans will be informed by extensive stakeholder engagement to map current and future barriers to HP market exploitation and skills development. Leading experts in the HP and Energy sector will support the regional actors to prepare the market for new innovations related to HP technology, procurement and contracting services. The impact of the project will be maximised through the role of the Observers (HR, PT,RO ) as they will follow closely the development and validation of the HP4All package, being early adopters even before the project ends. Replication activities will include train-the-trainer, a roadmap and pan-European events for policy makers and public bodies.