Whanganui District Parthenay eHaus Euro, Certified, Passive House Plus


This striking family home was the first in Australasia to be certified Passive House Plus. Its performance has been monitored and reported on and it also featured in the book Positive Energy Homes. The buildings simple rectangular form maximises energy efficiency and easy of construction. It was designed and sized to match the Ecoblock Wall system with minimum waste.

The house opens up to impressive mountain views to the north. A bold use of colour inside adds immediate character and personalises the bedrooms for each of the family’s three teenage boys. The home provides excellent year round comfort including during the summer months, - no active cooling is required. This has been achieved in part due to the modest amounts of glazing on the eastern and western walls and well sized overhangs to the north.

NB: Initially certified as a Passive House by BRE UK in 2014. Sustainable Engineering subsequently certified it as a Passive House Plus in 2017

Extraordinary heat energy savings.

Every one of our projects are energy modelled using the Passive House Planning Package (PHPP). It's through this powerfully clever tool that we can accurately calculate just how much heat energy every eHaus will save when compared to a similarly- sized typical new home, built in the same climate region.

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This project is making significant carbon savings for a better environment.

We believe that our homes should have a big impact on the way we live, but little impact on the land. We've calculated the amount of carbon our homes have saved through energy efficiency from move in day 'til now. At their core, eHaus' are built with the elimination of carbon emissions in mind - so we're not only creating healthy, comfy & high performing homes, but spaces that don't cost the earth.

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Meet the team of designers and builders behind this project

Our eHaus team is made up of some of the country's best Passive House builders, architects and designers who are redefining the way kiwis live one home at a time. Our team of professionals work together to see your dreams come to reality.
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Design Components

Fully insulated concrete pad with a U-value of 0.24 W/(m²K)
ecoBlock ICF wall U-value of 0.261 W/(m²K)
Double layer of fibreglass insulation U-value of 0.145 W/(m²K)
Window Joinery Frame
eco Windows German laminated timber with aluminium outer facade (Wood Alu) Uf value 1.5 W/(m²K)
Double Glazed Low E Argon Ug value 1.10 W/(m²K) G Value 61%
Zehnder Comfo Air 350 MHRV
Hot Water
Heat Pump with external 285 litre water storage
400W Ceramic Panel
Power Generation
3kW Solar PV system
Ecological Features
22,500 litre water harvesting system. Natural flow black and grey water treatment system with composting.

Performance Specs

Heating Demand: 6.2 kWhy/m²/yr
Heating Load: 9 W/m²
Frequency of Overheating: 0%
TFA: 134.5 m²
Form Factor: 2.9
Air Leakage@50Pa: 0.47 ach
PER Demand: 33 kWh/m²/yr
Renewable Energy Generation: 45 kWh/m²/yr


eHaus - Cyril Vilbert


Sustainable Engineering - Jason Quinn
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