Description BACKGROUND In future UK low-carbon housing, it could be advantageous to be able to store heat from renewable technologies such as solar collectors or using green electricity by making use of the building fabric rather than traditional hot water tanks. This frees up floor space that would otherwise be taken up by storage. AIM AND METHOD The aim of this project is to develop a computer model or models of different fabric-integrated storage concepts and then test their performance using simulation. The output is to be a set of performance characteristics for the store including heat storage capacity, storage duration, charging and discharging heat exchange rates and temperatures, dynamic storage temperature profiles and heat loss characteristics. Key Objectives The specific objectives of the work are as follows. - Review of fabric-integrated storage concepts for heating and cooling, performance metrics and operating scenarios. - Develop integrated storage concept designs. - Design of a set of simulation-based experiments. - Run simulations and extract performance metrics. - Analyse and report on performance of the different storage concepts.