Twizel 003

EHAUS EURO, PHI LOW ENERGY

Twizel

Carbon Savings

50,290 KG

Heat Savings

93%

Designed by Jessica Eyres of Hiberna, this holiday house was built as a base for its owners to explore the outdoors with their young family. This minimalist industrial-inspired home, reminiscent of South Island high country huts, offers a seamless connection to the outdoors and ample storage. Featuring one bathroom, separate toilet and two spacious bedrooms, with an additional snug or single bedroom and a mudroom, it caters to the owners’ desire for practicality and comfort. With a ground floor area of 119m2 plus a 25m2 mezzanine with storage, this home maximizes space efficiency. 

The brief emphasised hard-wearing, durable finishes, resulting in a warm, comfortable, and energy-efficient space. Clad in cedar vertical board and batten and corrugated steel, with wood joinery and triple glazing, this home is not only simple but also beautiful. Guests have praised its outstanding performance, even in cold weather, with no need to light the fire. 

This home has featured on the front cover of the international Passive House Plus Magazine and also New Zealand House and Garden November 2017 edition.    

Design Components

Floor
Fully insulated concrete pad with a U-value of 0.240 W/(m²K)
Wall
SIP construction with insulated service cavity U-value of 0.213 W/(m²K)
Roof
SIP construction with insulated service cavity U-value of 0.154 W/(m²K)
Window Joinery Frame
ThermaDura NatureLine Wood Uf value 1.11 W/(m²K)
Glazing
Triple Glazed Low E Argon Ug value 0.53 W/(m²K) G Value 50%
Ventilation
Zehnder Comfo Air 350 MHRV
Hot Water
Rinnai hotwater heat pump split system with internal 300 litre water storage.
Heating
Bionic wood burner with ultra low emission down draught burner

Performance Specs

Heating Demand
19.0 kWh/(m²yr)
Heating Load
12.0W/m²
Frequency of Overheating
1%
TFA
149.6 m²
Form Factor
3.2
Air Leakage @ 50Pa
0.46 ACH
Per Demand
51 kWh/(m²yr)

Consultant: eHaus - Jon Iliffe

Certifier: N/A