2023 02 11 12 02 43 483 Enhanced

EHAUS EURO, PASSIVE HOUSE CLASSIC

Toiora High Street Co-housing Project

Carbon Savings

225,325 KG

Heat Savings

92%

In 2013 the Urban Co-housing Otepoti was formed, and over a six-year period, the group developed and refined their ideas and requirements into an economically viable, energy efficient co-housing development project. 

The group now known as Toiora High Street CoHousing Community purchased a 5,000 sqm site that was the former High Street Primary School and in November 2018, eHaus Otago commenced construction. The project is New Zealand’s first certified passive house co-housing development. 

There are 21 passive house homes, ranging in size from two bedroom to large five-bedroom homes, each with their own private outdoor area. All the homes are certified to the International Passive House "Classic" standard, with triple glazing, thicker wall construction, superior insulation than new conventionally built houses as well as being designed to ensure they meet the Passive House air tightness standard. 

Combined with individual mechanical heat recovery ventilation systems to ensure that fresh filtered air circulates the homes and keeping the temperature between 20-22 degrees all year round. In addition to the 21 Passive Houses, part of the former school buildings has also been modified to accommodate a large communal community centre which includes dining area, offices and meeting rooms. 

Passive House Classic Certification was awarded in two parts; the first consisting of 6 homes in a single terraced row referred to the Alva Street block. The second a multi level development of 15 units referred to as the High Street block.

"

It feels wonderful to be in our new home. I actually think I may be ruined for living anywhere else because our standard has risen so much, it’s amazing. I’m not worried about whether the kids are cold or warm which was a really big thing for us in the house we were in before. For us, a house that is sustainable feels really good!

"

— Jessica Ross

Meet the team Behind this project

Tim designhaus

Tim Ross

Tim is an award winning architect specialising in the design of high performance Passive House and low energy architecture. He has a wealth of experience in designing both private homes and multi-unit projects.

Design Components

Floor
EPS raft slab 360mm U-value = 0.103 W/(m²K)
Wall
SIP Panels 165mm U-value = 0.303 W/(m²K))
Roof
Fibreglass, total thickness 240mm U-value = 0.167 W/(m²K)
Window Joinery Frame
Energate, uPVC 843 U w-value = 1.27 W/(m²K)
Glazing
Triple glazing low e Argon U g-value = 0.63 W/(m²K) g -value = 62%
Ventilation
Zehnder MHRV
Hot Water
Central hot water heat pump + tank hot water for each building with water meters for hot water to each unit
Heating/Cooling
Resistance electric heating in each unit

Performance Specs

Heating Demand
15
TFA
1827

Consultant: Birgit Bartel

Certifier: Jason Quinn