PHPP Version 9.6 has now been tested pursuant to ASHRAE 140

“PHPP Version 9.6 has now been tested pursuant to ASHRAE 140, which qualifies it as an acceptable energy modelling software under a variety of regulatory systems” This means that PHPP could now be used for H1 verification via the modeling method for buildings with interesting glazing ratio’s or other non-standard features. The issue will be that Section G1.6.3 in “NZS …

Prevention of fabric and interior furnishings fading from the sun

If you could block 100% of UV light than the fading would be reduced to approximately 1/3rd the amount. As the entire spectrum of light contributes to fading and it is very dependant on the material the best you can do is select a glass which has low damage-weighted transmittance has the symbol T-dw. This isn’t perfect as T-dw was developed …

24 July 2001 Nature.com: Original Article | Published: 24 July 2001 The National Human Activity Pattern Survey (NHAPS): a resource for assessing exposure to environmental pollutants

Many speakers talk about how much time we spend indoors when they talk about how important indoor air quality is and they seldom take the time and reference source of references. So I thought I’d point out this very technical reference to the amount of time spent indoors was a survey done in the United States. It’s been done quite …

Documentation required for a Certified Passive House

A fairly common question during the certification process is ‘What sort of construction documentation is required for a certified passive house?’ Required documentation for a Certified Passive House (Passivhaus) or PHI Low Energy Building is that sufficient to fully check the energy model and design quality and assure that the building was built as per the design. That sort of …

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 …

The Four Control Layers – Fundamentals of Building Science

The Building Enclosure and the Four Control Layers   Understanding of the building enclosure and the four control layers that make up the building enclosure is vital to understanding how the building enclosure will perform Enclosure The building enclosure is what separates the inside environment from the outside ‘natural’ environment. This includes everything from the paint on the outside of …

SE Certification Platform Checklist

Sustainable Engineering Ltd. provides client certification resources to help them with their certification process. The attached link to the PDF is a list of all the different entries of the Passive House Certification Platform to enable you to go through and just check off and make sure you’ve made each of these entries to make the certification process easier and …

Passive House Climate Files for NZ

As of 13 December 2017 there are six additional PHI certified climate files for NZ. These now cover all of NZ including the Chatham Islands. It is important to note these are all (excluding the Chathams file) based on work done by NIWA to develop regional files for NZ and this last set of climate certification work done by PHI …