Whanganui District – Roxborough
eHaus Euro - Certified Passive House Classic
It’s remarkable how much fits inside this two-story 151 m2 home for an extended and expanding family. The clients wanted a functional and compact home, a place that was both dignified and comfortable. It also includes a self-contained flat, gym, library and 3.5 bathrooms“Without a doubt the most comfortable house we’ve ever lived in, year-round and without having to burn power to make it that way, which is awesome”
Design Components
Floor – Fully insulated concrete pad with a U-value of 0.238 W/(m²K)
Wall – ecoBlock ICF wall U-value of 0.096 W/(m²K)
Roof – Double layer of fibreglass insulation U-value of 0.205 W/(m²K)
Window Joinery Frame – Hilzinger, KBE Prestige Upvc Uf value 1.53 W/(m²K)
Glazing – Double Glazed Low E Argon Ug value 1.10 W/(m²K) G Value 62%
Ventilation – Zehnder Comfo Air 350 MHRV
Hot Water – Flat plate solar system with internal 300 litre water storage
Heating/Cooling – Inline heating element incorporated into ventilation system and controlled by comfo ease panel
Power generation – 5 kW Solar PV system
Ecological features – 2 x 22,500 litre water harvesting system. Natural flow black and grey water treatment system with composting. Clothes drying cupboard integrated into the ventilation system
Performance Specifications
Floor Area – 151m2
Heating demand: 11.0 kWh/m2/annum
this compares to minimum compliance 6 Star house at approx. 50 kWh/m2 per annum
Heating Load: 10 W/m2
Frequency of Overheating 0%
TFA: 151.3 m2
Form Factor: 3.06
Air Leakage@50Pa: 0.6 ACH
PE demand: 100kWh/m2/yr