Greytown Wairarapapa exterior

EHAUS EURO, PASSIVE HOUSE CLASSIC

Greytown

Carbon Savings

58,599 KG

Heat Savings

91%

This comfortable, contemporary three-bedroom eHaus has been designed to balance everyday functionality with strong architectural form. The open-plan lounge, kitchen and dining area is the heart of the home, flowing through large doors to a north-facing outdoor living space that's perfectly positioned to maximise sun, warmth and connection to the garden.

Certified to the Passive House Classic standard, this home delivers an exceptional 91% predicted reduction in heating energy, providing stable indoor temperatures, outstanding comfort, and ultra-low energy use. 

Sited sympathetically toward the southern boundary, the home creates generous space for gardens and indoor-outdoor flow, while presenting strong visual appeal from the street. A mono-pitch roof completes the design, efficiently shedding the strong Wairarapa winds while reinforcing the home’s clean, contemporary aesthetic.

"

Our eHaus is infinitely better compared to our previous 1970's barely insulated house! Our family and friends note the comfort, even though their homes are also comfortable but at a much greater heating cost.

"

— Robin

Design Components

Floor
Fully insulated concrete pad with a U-value of 0.214 W/(m²K)
Wall
ecoBlock ICF wall U-value = 0.244 W/(m²K)
Roof
Double layer of fibreglass insulation U-value of 0.193 W/(m²K)
Window Joinery Frame
Energate – Ludwig Häussler Gmbh, EN 843 Upvc U w-value = 0.87 W/(m²K)
Glazing
Triple glazed units 4/18/4/18/4 Argon Low E U g-value = 0.5 W/(m²K) g -value = 52 %
Ventilation
Zehnder Comfo Air 350 MHRV
Hot Water
Flat plate automatic drain down Solar Thermal system with 300 Litre storage tank
Heating/Cooling
500W inline heat coil fitted in the ventilation system. Controlled by comfo ease panel
Ecological Features
2500 Litre Rain water harvesting system

Performance Specs

Heating Demand
15.6 kWh/(m²yr)
Heating Load
14 W/m²
Frequency of Overheating
2.7%
Treated Floor Area
150.2m²
Form Factor
3.61
Air Leakage @ 50Pa
0.6 ACHn50
Per Demand
109 kWh/(m²yr)

Consultant: eHaus - Jon Iliffe

Certifier: MosArt Ireland