Sponsored by Mitsubishi Electric Heat pumps are transforming heating and cooling in commercial buildings. This podcast featuring leading design and manufacturing experts discusses the impact of heat pumps on the commercial market and looks at the optimal design solutions for minimising energy use and carbon emissions. Areas covered include future-proofing developments, design challenges, heat recovery opportunities and the embodied energy of heat pumps. The guests in the CIBSE Journal podcast chaired by editor Alex Smith were: • Bean Beanland, director of growth and external affairs at the Heat Pump Federation • Cherry Chan, mechanical engineer at Elementa Consulting • James Chaplen, senior product manager at Mitsubishi Electric • Tim Dwyer, visiting professor at UCL as well as the CIBSE Journal’s technical editor • Mark Poulter, project director at ChapmanBDSP • Bill Watts, senior partner at Max Fordham