designPH 1.5 PRO updated for the Southern Hemisphere

Good news for all designPH users in New Zealand, designPH 1.5 has been released as a free update and it now automatically takes account of the orientation of Southern Hemisphere designs! (No need to flip the model.) For full information on the update visit Existing customers can update for free at after login. Read more about designPH 1.5 PRO updated for the Southern Hemisphere[…]

Measuring Airtightness in New Zealand Passive Houses

A blower door test to measure the airtightness in a New Zealand Passive House building needs to be performed in accordance with AS/NZS ISO 9972:2015. The only exception to this is the calculation of the internal reference volume outlined in section 6.1.1 of the standard. The air change rate (ach) at a pressure difference of Read more about Measuring Airtightness in New Zealand Passive Houses[…]


First for NZ: Certified Passive House Component made in NZ

Exciting news to start 2017: there is now a Passive House certified component being made in Aotearoa NZ for the first time! Congratulations to Thermadura for achieving certification for the NatureLine PASSIVE range of timber windows. In the international Passive House Component Database: Download the certificate PDF here. We expect to see the certification Read more about First for NZ: Certified Passive House Component made in NZ[…]

How to account for thermal bridges

R or U-values do not tell the whole story about transmission heat loss through the building envelope. In fact, the better you insulate your building, the more you need to pay attention to rat-runs to get the full benefit of the thermal separation. The following instructions are a refresher for people who did thermal bridge Read more about How to account for thermal bridges[…]

All models are wrong – but some are useful

The right tools are needed to do a proper energy modelling job. For Certified Passive Houses, using the Passive House Planning Package (PHPP) is mandatory. It is the only energy modelling tool in the world that has successfully been tested against real-world results on a large number of projects (see here for some examples). Thousands of Certified Passive Houses deliver results very close to the modelling expectations. Other modelling tools are clearly not performing that well, or have never been tested. […]

Taramea Passive House

The Housing Trifecta. Can we have homes that are affordable, healthy and resilient?

This important article by PHINZ member Glenn Murdoch was published today on the Pure Advantage website. Affordability, Health and Comfort, Climate Change Resilience Our homes are important to us. Be it owned or rented our home is where we live, love, laugh, play, share and rejoice. It’s where we raise our kids, have dinner with Read more about The Housing Trifecta. Can we have homes that are affordable, healthy and resilient?[…]

Passive House Certifier and Passive House Designer

NZ’s First Passive House Certifier Confirmed


Certifying a Passive House Building in New Zealand and the South Pacific just got easier with confirmation that New Zealand has our first Passive House Certifier.

Jason Quinn, of Whanganui, has just completed the requirements to become a Certifier at the International Passive House Conference in Darmstadt. […]

Melbourne Photo

South Pacific Passive House Conference 2017 in Christchurch

  The 2016 conference in Melbourne ended on a high – join us in Christchurch next year for the 3rd South Pacific Passive House Conference. We expect delegates from around the world to report about projects, building science, cost, user experience and design and building challenges. More details on the conference website and you can Read more about South Pacific Passive House Conference 2017 in Christchurch[…]

Comfort in an eHaus Passive House

Passive Houses – built for comfort and health

It is impossible to achieve an indoor environment that can be categorised as comfortable by international standards (e.g. ASHRAE 55 or ISO 7730) with an indoor air temperature of only 18°C.

Despite the myth, there is no indication that Kiwis are more tolerant to colder temperatures than people elsewhere in the world, which should not come as a surprise, as many of us were born overseas, or grew up in far away places. In fact, several NZ studies suggest that if Kiwis are capable, technically and financially, to heat their homes to the degree Americans and Europeans are accustomed to, they will (Fyfe, 2005; Howden-Chapman et al, 2009). […]