The Hanham Hall development by Barratt on the outskirts of Bristol, has created great interest nationwide for its potential contribution to – and perhaps even more importantly, its long term monitoring of – domestic energy efficiency, says test and research organisation BSRIA. Barratt is determined that its homes should be practical and affordable to run, BSRIA explains, coinciding with the goal of creating a situation where tried and tested energy efficiency can be replicated elsewhere in time to meet the anticipated zero carbon Building Regulations in 2016.<br> <br> Barratt has ordered a total of 185 Wi5 systems from BSRIA for Hanham Hall. Each home will be checked for utilities consumption, and a random selection of houses will be monitored for internal environmental living conditions. These include temperature, humidity and carbon dioxide emissions as well as the energy used for hot water, the quantity of water used domestically from rainwater harvesting and photovoltaic generation sold into the grid.<br> <br> The wireless Wi5 kits supply the information required via equipment that is easily concealed and designed to be largely unnoticed by the householders being monitored, BSRIA claims.