Passive House: Principles, Performance and Practical Application

Passive House is one of the most misunderstood concepts in residential construction... often dismissed as “too expensive,” “too European,” or “not suited to Australian climates.” In this episode, Dean sits down with Daniel Kress, founder of Smart Plus Academy, to talk about what Passive House is, how it works, and why builders need to understand it.Drawing on decades of experience across Germany, Ireland, Canada and Australia, Daniel explains the building physics behind comfort, airtightness, moisture control and energy use, and why most Australian homes still get these fundamentals wrong. The conversation also explores cost myths, window performance, the limits of NatHERS, and how better design-build integration can dramatically reduce construction risk.It’s a practical, builder-level conversation about performance, process, and why understanding Passive House principles can make you a better builder.In this episode:Daniel’s journey from German carpentry and prefab construction to Passive House educationWhy Passive House works in all climates, including AustraliaThe science of comfort: temperature, humidity, CO₂ and health outcomesAirtightness explainedThe difference between Passive House, Passive House principles, and greenwashingWhy certification existsCommon misconceptions around costReal numbers: additional cost per m² and where it’s actually absorbedWindows, condensation and why double glazing alone isn’t enoughUPVC vs aluminium vs timberWhy NatHERS misses critical performance issues in real buildingsHow builders can take control earlier through site selection and design inputWhere AI is already reshaping design, costing and performance modellingWhy Passive House forces better communication between designers and buildersThe long-term financial, health and comfort benefits of getting it rightLinks & Resources:Smart Plus Academy https://smartplusacademy.comPassive House Institute https://passiv.deAustralian Passive House Association https://passivehouseaustralia.orgPro Clima – Building envelope systems https://proclima.comNatHERS energy rating scheme https://www.nathers.gov.au/Hosted by Dean Ipaviz, builder & director at Verdecon, creating high-performance, low-impact homes across Australia. Follow Dean Ipaviz and @_thebuiltenvironment on Instagram and visit thebuiltenvironment.com.au