Dr Hector Altamirano is Associate Professor in Environmental Design and Engineering at the Bartlett Faculty of the Built Environment, UCL. He is a building scientist, trained architect with a broad research interest in energy, indoor environment and operational performance of buildings. The outcome of his work on the humidity in dwellings project (2005-2007) ODPM Building Operational Performance Framework (CI 71/6/41 BD2515) was incorporated into Appendix A of Approved Document F 2010 and now fo