Waikato – Cambridge

In by Shelley

Waikato – Cambridge

Certified Passive House Classic

Tim Ross from Architype met the challenge of a long narrow site and district plan setback requirements for this couple relocating to Cambridge who wanted a comfortable, energy-efficient house that would meet their needs as they aged.

The layout, structure, services and aesthetics of the building tightly work together to create a simple yet extremely high performing building. Construction was with structurally insulated panels (SIP). A beautifully crafted and designed family home.

Design Components

Floor – Fully insulated concrete pad with a U-value of 0.232 W/(m²K)

WallStructural Insulated Panels with PUR (025) 90mm, with 20mm services cavity U-value = 0.304 W/(m2K)

RoofTimber framed roof with 315mm of batts insulation (040 – 047) U-value = 0.15 W/(m2K)

Window Joinery Frame – Dopfner, Slim Double glazed spruce framed and aluminium shielded tilt and turn windows U w-value = 1.32 W/(m2K)

Glazing – Double Glazed Low E Argon Ug value 1.12 W/(m²K) G Value 58%

Ventilation – Zehnder Q350 MHRV

Hot Water – 2x Apricus ETC30 solar collectors on 20 degree frames connected to Peter Cocks 300L silver bullet tank

Heating/Cooling – Daikin FTXS46L (4.6kw cooling/5.4kw heating) high wall

Performance Specifications

Heating Demand: 14,7 kWh/mr/yr

Heating Load: 13.3 W/m2

Frequency of Overheating: 0%

TFA: 207.6m2

Form Factor: 3.1

Air Leakage@50Pa: 0.3 ACH

PER demand: 42 kWh/m2/yr

Experience this eHaus for yourself

Contact eHaus Waikato

Passive House Project Team


Tim Ross Architype NZ


eHaus Waikato


Architype NZ


Sustainable Engineering - Jason Quinn