Es Tresidder from Highland Passive explains what an air-to-air mini split heat pump is, why he believes it's a good choice for heating a high performance home and the various pros and cons of going down this route. He also reflects on one of the toughest stages of his retrofit when they took the roof off the existing dwelling and then faced torrential rain. Check out the show notes for more information.

Having spent the last few years working within the Ministry of Housing, Communities and Local Government, John Palmer explains how building regulations are made and what their role is within the construction industry. Check out the show notes for more information.

Will South from Etude takes us step-by-step through the retrofit of his Victorian terrace house in Brighton, which has improved the health, comfort and energy efficiency of the property. Check out the show notes for more information.

Joshua English, co-founder of Okom wrks labs shares his journey into the creation of a mycelium-based composite material, which has structural and load-bearing properties. Check out the show notes for more information.

Architect Kirsty Maguire shares her experience of designing and building her own Passivhaus on a challenging sloping site in Newport-on-Tay, Scotland. Check out the show notes for more information.

Sally Godber, a Director at WARM consultancy explains why reducing the risks on her own Passivhaus project was so important, what that entailed and how it enabled her to deliver a healthy, comfortable and energy-efficient home on budget. Check out the show notes for more information.

Andy Mitchell, Managing Director of 21 Degrees, explains what factors influence human comfort and how we have tried to make our homes more comfortable through the years. Embracing building physics has been a turning point and while we have the knowledge and skills to create healthy and comfortable homes today, it's still not the default approach. So Andy outlines the options available to get yourself into a better home. Check out the show notes for more information.

Ben Nother, a Director at Hawkland Group, explains the two different roles of Principal Designer in meeting building regulations and addressing CDM health and safety. He also reflects on how this has been integrated into their processes. Check out the show notes for more information.

Phil Neve explains what Passivhaus Premium is and why he chose to target the standard for his own self build in Somerset. He also talks through his biggest project challenge, which was obtaining planning permission to build in open countryside. Check out the show notes for more information.

Heather Johnson from AD Practice explains what Passivhaus Plus is, how it differs from Passivhaus Classic accreditation and what benefits achieving the standard will afford. She also reveals why most of her clients target 'Plus' and outlines the steps to achieve this on a project. Check out the show notes for more information.