9 October 2017 AIRAH: Improving the energy efficiency of residential climate control systems

Newly released standard AS/NZS 5141:2018 Residential heating and cooling systems – Minimum applications and requirements for energy efficiency, performance and comfort criteria Specifies requirements for the design, selection, installation, commissioning and maintenance of residential heating and cooling systems to maximize operating energy efficiency within residential buildings. It also sets requirements to achieve prescribed performance and comfort criteria. This standard includes …

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 …

WUFI

Hygrothermal modeling with WUFI Sustainable Engineering can perform hygrothermal modeling of your proposed assemblies using WUFI one or two dimensional software. Quick initial reviews of assemblies and more in-depth consulting to improve or fix the assemblies performance are available. Presentation for Expert Tour 2015 – Introduction to WUFI As part of the 2015 Expert Tour Sustainable Engineering Ltd. was asked …

Stress test your design for Overheating

I hate comfort complaints. Not the complaining bit – folks are nice – but I hate the failed expectations of comfort. This past summer I had several calls from clients living in certified Passive Houses. They say it’s too damn hot. What is going on here? The Passive House Planning Package (PHPP) appears to predict the overheating pretty well. When …

Glass is rocket science for high performance buildings

During a presentation at the South Pacific Passive House Conference in Christchurch (March 2017). I spoke on lessons learned from New Zealand projects. One of the biggest lessons we’ve learned is that windows are the rocket science in high performance buildings.  They are very advanced technology originally from the space industry and they can make your building high (sky high) …

Fundamental 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 from the paint on the outside of the wall cladding to the finish surface on the inside …

How to estimate of the R-value of unconditioned spaces

Several Passive House projects undergoing certification have requested a way to estimate the additional R-value of an adjoining unconditioned spaces (such as garage). A good example is a garage which is part of the building but outside of the Passive House Thermal Envelope. This garage will increase the insulation value of the thermal envelope by buffering it from the exterior …