22 May 2002
Annex 25 started in 1998 and is nearly achieved. Its objectives are to define and show the technical feasibility of new packaged systems for year round residential space conditioning using heat pumps. These systems target only residential dwellings and use either water or air as energy distribution vector. First, each participating country has produced a state-of-art study which contains an analysis of the existing systems, the market and the users’ expectations, in order to define a new concept of heating/cooling system. Then demonstration projects have been launched to prove the feasibility and the performance of these systems.