His research interests are in the field of low energy heating and cooling systems, passive building design and building integrated renewable energy systems. His current research includes modelling of advanced ground heat exchanger technologies and district heating and cooling networks. Other work has included application of HPC methods to analysis of wind energy systems and holographic data visualization. His expertise in building energy modelling has resulted in him being invited to join design teams for a number of innovative low energy buildings such as the Co-op Headquaters building at 1 Angel Square, Manchester. He has published more than fifty papers on building modelling and renewable systems and recently edited and co-authored the book ‘Advances in Ground Source Heat Pumps’.