Tom DollardTom Dollard is Head of Sustainable Design at Pollard Thomas Edwards. He is an architect with wide experience in sustainable design and construction, with a particular specialism in Passivhaus. He is author of the Zero Carbon Hub Builders' Book and ha lead performance gap site reviews since 2013. He is vice-chair of the Zero Carbon Hub Ventilation and Indoor Air Quality research project and continues working with the hub on research to advise government and industry on current housing policy. Read More Read Less