25 October 2018 HVAC&R News’ Marc Vender: Mould Inquiry Calls for Tighter Building Standards

Surprise! Australian buildings have very similar problems to New Zealand buildings. They’re finding that mould is prevalent throughout their buildings because they don’t require designing to prevent mould in their building code. Because they don’t design cold spots out of the buildings or sufficient ventilation they have condendation and then mould in their buildings. And as we all know this …

26 October 2018 Passive House Plus Jeff Colley: Study: extreme overheating not reflected in building simulations

Dangerous overheating in buildings may not be showing up in desktop studies, new research suggests.”   “Monitored operative temperatures of up to 47.5C recorded in a highly glazed apartment building in London were not reflected in software modelling of the same building, with temperature peaks in simulated scenarios between 18C and 30C cooler, depending on which weather files were used.” …

26 October 2018 Passive House Plus’ Kate de Selincourt: Performance gap much smaller for passive homes, research finds

This report reviewed detailed test measurements for air tightness and heating loads for passive houses and non-passive houses designed to meet an energy target. From this data the Passive Houses (Passivhaus in the UK) predicted performance matched quite closely to the measurements compared to other non-passive house designed buildings. “Most of the homes were fitted with mechanical ventilation with heat …

Calling All Passive House Builders

I’m helping to set up a session of hands on builders to each speak for 5 minutes at the next Passive House Conference in Wellington (9th and 10th of February). The concept is to have some real hands on discussion from folks actually building Certified Passive Houses rather than all the talks being from design folks. You would all be speaking together …

14 June 2018 BRANZ Transition to Low Carbon Built Environment by 2050

I was a bit disappointed reading this brief workshop report as the conclusions are very cautious. It started strong by reviewed some epic keynote points like ice free summers at the North Pole by 2030 (12 years away by my math) and the need for negative carbon emissions to stay below 2 degrees increase. Then went on to how industry …

06 September 2018 David Hargreaves argues that what is missing from the Government’s Healthy Homes initiative is a long-term plan to modernise all of New Zealand’s housing stock

This article is great. The author actually gets the obvious limitations built into this government act. Even if NZ chose the top option of all those offered we wouldn’t have guaranteed warm healthy homes. They would be better but not much better … unless someone pays the tenants (large) heating bill. One issue I think is missing is that new …

04 September 2018 SunLive: Healthy Homes Proposals Made Public

I’m glad to see that this is finally out for public comment. Although this article focuses on Rental Housing I see these issues with owner occupied and brand new housing as well; And yes these are new homes built to meet NZ Building Code. The high performance building industry needs to comment as a whole on what will actually fix …