Hawkes Bay – Hatuma

In by Shelley

Hawkes Bay – Hatuma

eHaus Pacific - Verified

Because of the elevated site this home has incredible views over Hatuma Lake and the surrounding rural landscape and on to the east coast. This is where attention to detail with the fabric of the building especially  airtightness really pays dividends. Every eHaus is tested at a pressure of 50 Pascals simulating a force 5 wind on the Beaufort scale. A wind like that would not be unusual in this location! The home has 3 bedrooms including the master, a lovely feature is the reading room a prefect place to curl up with a good book.

“The property we bought to build our new house on it was extremely exposed, very windy and we knew that the eHaus was going to be the right one for our situation. Our experience was excellent from the moment we joined the information evening we got a lot of good information that helped us to decide to build with eHaus” Randall & Mary

Design Components

Floor – Fully insulated concrete pad with a U-value of 0.183 W/(m²K)

Wall – 140mm timber frame with service cavity U-value of 0.221 W/(m²K)

Roof – Double layer of fibreglass insulation U-value of 0.159 W/(m²K)

Window Joinery Frame – APL- Thermally broken aluminium- Uf value = 4.30 W/(m²K)

Glazing –  Double Glazed  Argon Ug value=1.12 W/(m²K) G value = 61%

Ventilation – Zehnder Comfo Air 350 LH MHRV

Hot Water – Bosch Compress 3000 – 270L capacity heat pump hot water cylinder to supply bathrooms and Rinnai Infinity VT16 gas instantaneous water heater to supply kitchen and laundry.

Heating/Cooling – Panasonic 1.37kW Mini Cassette heat pump ceiling mounted.

Power Generation – 10 kW solar photovoltaic array and a 8.8 kW generator as backup.

Performance Specifications

Heating demand: 33.5 kWh/m2/yr

Heating load: 14.7 W/m2

Frequency of Overheating 2.8 % year over 25C

TFA: 169.2 m2

Form Factor: 3.6

Air leakage@50Pa: 0.88 ACH

PER demand: 47.5 kWh/m2/yr

Experience this eHaus for yourself

Contact eHaus Hawkes Bay

Passive House Project Team


Ross Bennett


eHaus Hawkes Bay - Ian Welch Builders


Maria Rei