McCartney residence, Passivhaus Classic home

ideadmin on 5 June 2025

Description The McCartney Residence is located in New Plymouth, on the North Island of New Zealand. The home was built by eHaus, a company established in 2010 by Jon Iliffe and Baden & Glenda Brown with the dream of creating a New Zealand owned and operated specialist design and construction company using PassivHaus build and …

McCartney residence, Passivhaus Classic home

Passivhaus Certification

Description

The McCartney Residence is located in New Plymouth, on the North Island of New Zealand. The home was built by eHaus, a company established in 2010 by Jon Iliffe and Baden & Glenda Brown with the dream of creating a New Zealand owned and operated specialist design and construction company using PassivHaus build and design principles.

The home was designed by architect Ross Bennett, with Passivhaus consultancy done by Maria Rei of eHaus, and Passivhaus Certification by Oliver Style of Praxis Resilient Buildings.

This single-story, detached family home has a treated floor area of 125 m² and was built using a lightweight timber frame system, and Gealan Eco Passivhaus certified PVC windows were used. SIGA membranes and tapes have been used for airtight layer.

The blower door test for this home achieved an excellent result of n50 = 0,4 air changes per hour (ACH).

Ventilation is provided by a Zehnder ComfoAir Q350 HRV unit with whole house balanced mechanical ventilation with heat recovery. A Panasonic split system is used for heating and cooling.

Links:

iPHa (Base de datos internacional de proyectos Passivhaus)

Year: 2025
Location: New Plymouth, Taranaki, New Zealand
Architecture: eHaus – Ross Bennett
Services provided by Praxis: Passivhaus Certification
Passivhaus Certification Class: Passivhaus Classic
Climate zone: Warm Temperate
Floor area: 125 m2
Thermal envelope area: 460 m2
Blower Door Result: 0,35 n50
Heating Demand: 19 kWh/m2·a
Cooling Demand: 0 kWh/m2·a
Primary Energy Renewable consumption (EPR): 46 kWh/m2·a
Final Energy consumption: 44 kWh/m2·a
Renewable energy generation: 0 kWh/m2·a
CO2eq emissions: 16 kg/m2·a

Residence in Blenheim: Passivhaus Plus home

ideadmin on 5 June 2025

Description This new residence is located in Blenheim, on the South Island of New Zealand, and the first to receive Passivhaus certification in Marlborough. The home was built by eHaus, designed by architect Vlada Acimovic, with Passivhaus consultancy by Maria Rei of eHaus. The project was certified to Passivhaus Plus by Oliver Style of Praxis …

Residence in Blenheim: Passivhaus Plus home

Passivhaus Certification

Description

This new residence is located in Blenheim, on the South Island of New Zealand, and the first to receive Passivhaus certification in Marlborough. The home was built by eHaus, designed by architect Vlada Acimovic, with Passivhaus consultancy by Maria Rei of eHaus. The project was certified to Passivhaus Plus by Oliver Style of Praxis Resilient Buildings.

This is a single-story, detached building with a treated floor area of 157 m², built with a lightweight timber frame system, and Gealan Eco Passivhaus certified PVC windows with low-e triple glazing. SIGA membranes and tapes have been used for airtight layer. The blower door test for this home achieved an excellent result of n50 = 0,5 air changes per hour (ACH).

Ventilation is provided by a Zehnder ComfoAir Q350 HRV unit with whole house balanced mechanical ventilation with heat recovery.

“Certification was valuable to me, since my career as a chartered accountant attached value to the distinction between registered and unregistered practitioners,” explains co-owner Steven Molotsky.

This is the third project to be certified by Praxis Resilient Buildings in New Zealand.

Link to The Press article: https://www.thepress.co.nz/home-property/350404895/why-were-swapping-1927-bungalow-passive-house

Pep – iPHA

Year: 2025

Location: Blenheim, Marlborough, New Zealand

Architecture: eHaus – Vlada Acimovic

Service provided by Praxis: Passivhaus Certification

Passivhaus Certification Class: Passivhaus Plus

Floor area [m2]: 157

Thermal envelope area: 577 m2

Blower Door result: 0,46 n50

Heating Demand: 12 kWh/m2·a

Cooling Demand: 1 kWh/m2·a

Primary Energy Renewable consumption (EPR): 31 kWh/m2·a

Final Energy consumption: 29 kWh/m2·a

Renewable energy generation: 55 kWh/m2·a

CO2eq emissions: 10 kg/m2·a

Casa #SgPi: Passivhaus Premium home

ideadmin on 19 July 2023

Praxis has carried out the Passivhaus Premium certification of this single-family home in Sant Pere de Ribes, Barcelona, designed by the architect and Passivhaus Designer Sergi Gargallo of SgARQ Passivhaus Architecture.

Casa #SgPi

Passivhaus

Description

The house has a useful floor area of 254 m2 over a ground floor and three upper floors. The project was developed by reusing an existing structure that remained unfinished, built more than 10 years ago on the same plot, thus reducing the environmental impact of the house.

Outer walls consist of a honeycomb brick with 10cm of high-performance EPS external thermal insulation. The roofs have between 10cm and 20cm of XPS insulation, and the window frames are Passivhaus certified WERU Afino One PVC with triple glazing and exterior shading devices.

An excellent result was achieved in the “Blower Door” air tightness test of n50 = 0.22 ach.

A solar photovoltaic array supplied by Prot Energia was installed on the roof, which generates 11,313 kWh/a of renewable energy. The owner also has an off-site solar photovoltaic installation that generates 10,609 kWh/a, totalling 21,922 kWh/a. The house is expected to consume a total of 6,864 kWh/a.

Through the Passivhaus certification process, Praxis audited all the calculation and design documents presented by the Passivhaus Designer, including the PHPP calculation, thermal bridge calculations, architectural and service drawings and reports, the Blower Door test report, the ventilation commissioning report, and photographic documentation of the entire construction process, to ensure that the building was built as designed and as calculated in the PHPP energy model.

PEP: https://www.plataforma-pep.org/ejemplos-ph/casa-sgpi/

iPHA: https://passivehouse-database.org/index.php?lang=en#d_7297

Photos: Joan Giribet

Year: 2023

Location: Sant Pere de Ribes, Catalonia

Services:
Passivhaus certification

Olloki, Navarra: Passivhaus Plus home

ideadmin on 11 February 2025

This single family home in Olloki has achieved Passivhaus Plus certification. Designed by the architecture studio IM Arquitectos Urbanistas SL with

Olloki, Navarra: Passivhaus Plus home

Passivhaus Certification

Description

This single family home in Olloki has achieved Passivhaus Plus certification. Designed by the architecture studio IM Arquitectos Urbanistas SL with

Pedro Mariñelarena Albéniz as Passivhaus Designer, the home was certified by Oliver Style from Praxis Resilient Buildings.

Built over two floors and located towards the back of the plot, the home’s main façade faces southeast. Its light-coloured walls are insulated with external insulation and an insulated service void to the inside. The pitched roof is insulated with mineral wool.

Unilux timber-aluminium windows with low-e argon-filled triple glazing and adjustable blinds were installed.

A Zehnder ComfoAir Q350 mechanical ventilation with heat recovery unit provides good air quality, removing contaminants and excess moisture 24 hours a day.

The heating and cooling system consists of an air-to-water heat pump with underfloor heating/cooling. The same heat pump provides hot water for showering and tap use.

A 7.2 kWp solar photovoltaic system installed on the roof generates about 8,600 kWh/year and enables the house to achieve Passivhaus Plus status.

The monitoring data show that the house is working correctly:

Predicted total consumption in the PHPP = 6,294 kWh/a
Average total consumption measured between 2022-2024 = 5,825 kWh/a

Links:

PEP

iPHa

Photos: Pedro Mariñelarena Albéniz

Year: 2025

Location: Olloki, Navarra, España

Architecture: IM Arquitectos Urbanistas SL

Services provided by Praxis: Passivhaus Certification

Passivhaus Certification Class: Passivhaus Plus

Climate zone: Warm Temperature

Floor area: 135 m2

Thermal envelope area: 526 m2

Blower Door Result: 0,57 n50

Heating Demand: 15 kWh/m2·a

Cooling Demand: 3 kWh/m2·a

Primary Energy Renewable consumption (EPR): 58 kWh/m2·a

Final Energy consumption: 47 kWh/m2·a

Renewable energy generation: 89 kWh/m2·a

CO2eq emissions: 25 kg/m2·a

Can Martí, Ibiza: Passivhaus Plus home

ideadmin on 6 February 2025

Casa Can Martí is a single-family home located in Ibiza, Balearic Islands, and is certified Passivhaus Plus.

Can Martí, Ibiza: Passivhaus Plus Home

Passivhaus Certification, Thermal bridge calculations

Description

Casa Can Martí is a single-family home located in Ibiza, Balearic Islands, and is certified Passivhaus Plus.

Fraile Project did the Site Supervision and Construction Management for the project. The home was designed by architects Antonio Albaladejo and Josep Ferrer Llaneras and certified by Oliver Style from Praxis Resilient Buildings.

The house is built with a CLT structure with external EPS insulation on the walls and XPS insulation on the roof.

The windows consist of aluminium-timber frames with low-e argon-filled double glazing, and exterior sliding shading devices and two pergolas on the north and south facades.

The house has a very high level of airtightness, tested on-site with a Blower Door test, together with a mechanical ventilation and heat recovery systems, that guarantees good indoor air quality and removes contaminants and excess humidity 24 h/d.

To reach Passivhaus Plus, 24 solar photovoltaic panels were installed on the roof, providing a 10.8 kWP generator, along with a vacuum tube solar collector for domestic hot water.

Links:

PEP

iPHa

Photos: Rafa Fraile

Year: 2025

Location: Santa Eulària des Riu, Islas Baleares, España

Architecture: Fraile Project with Antonio Albaladejo y Josep Ferrer Llaneras

Services provided by Praxis: Passivhaus Certification, Thermal bridge calculations

Passivhaus Certification Class: Passivhaus Plus

Climate zone: Warm

Floor area: 212 m2

Thermal envelope area: 852 m2

Blower Door Result: 0,63 n50

Heating Demand: 11 kWh/m2·a

Cooling Demand: 19 kWh/m2·a

Primary Energy Renewable consumption (EPR): 53 kWh/m2·a

Final Energy consumption: 50 kWh/m2·a

Renewable energy generation: 69 kWh/m2·a

CO2eq emissions: 15 kg/m2·a

Casa SG Mas Alba: Passivhaus Classic home

ideadmin on 6 February 2025

Sg Mas Alba is a single-family home located in Sant Pere de Ribes, on a steeply sloped plot, which defines the design of the house on two levels

Casa SG Mas Alba: Passivhaus Classic Home

Passivhaus Certification

Description

Sg Mas Alba is a single-family home located in Sant Pere de Ribes, on a steeply sloped plot, which defines the design of the house on two levels: the first floor, where the main access and daytime areas are located, and the ground floor, open to the garden, where the bedrooms are located.

The house was designed by the SG Arq architecture practice and certified by Oliver Style of Praxis Resilient Buildings as Passivhaus Classic.

Outer walls are made of honeycomb ceramic brick, insulated with external insulation. The terraces and flat roofs are made of concrete slabs, insulated with XPS insulation. The light external colours of the walls and roofs increase the reflection of solar radiation in the summer and reduce cooling demand- a typical vernacular passive strategy throughout the Mediterranean.

The windows include PVC frames with double glazing and external venetian blinds with adjustable slat angles for controlling solar gains. A Zehnder mechanical ventilation system with heat and humidity recovery provides optimum air quality and removal of excess humidity. Heating and cooling are provided by an air-source heat pump and indoor ducted split units. Domestic hot water is generated by a high-efficiency air-to-water heat pump, both made by Panasonic.

Links:

PEP

iPHa

Photos: Sg Arq

Year: 2025

Location: Sant Pere de Ribes, Barcelona, España

Architecture: Sg Arq

Services provided by Praxis: Passivhaus Certification

Passivhaus Certification Class: Passivhaus Classic

Climate zone: Warm

Floor area: 113 m2

Thermal envelope area: 470 m2

Blower Door Result: 0,42 n50

Heating Demand: 10 kWh/m2·a

Cooling Demand: 14 kWh/m2·a

Primary Energy Renewable consumption (EPR): 46 kWh/m2·a

Final Energy consumption: 37 kWh/m2·a

Renewable energy generation: 0 kWh/m2·a

CO2eq emissions: 13 kg/m2·a

Casa SG Joaquim: Passivhaus Plus

ideadmin on 21 November 2024

Description Casa SG Joaquim is a Passivhaus Plus certified home, designed by architect and Passivhaus Designer Sergi Gargallo of SgARQ Passivhaus Architecture, and certified by Oliver Style of Praxis Resilient Buildings. This terraced home has a façade to the main street and the interior patio to the rear of the property. The building consists of …

Casa SG Joaquim: Passivhaus Plus

Passivhaus

Description

Casa SG Joaquim is a Passivhaus Plus certified home, designed by architect and Passivhaus Designer Sergi Gargallo of SgARQ Passivhaus Architecture, and certified by Oliver Style of Praxis Resilient Buildings. This terraced home has a façade to the main street and the interior patio to the rear of the property.

The building consists of a ground floor and a first floor with an accessible roof terrace, garden and swimming pool. External walls are insulated with 100mm of external insulation, eliminating structural thermal bridges, with 200mm of thermal insulation on the roofs.

High-performance windows and a very low level of air leaks- tested on-site with a Blower Door test- reduce heat losses in winter and heat gains in the summer, keeping the house comfortable with minimal energy consumption.

The home has a whole house balanced mechanical ventilation system with heat and humidity recovery, with a Zehnder ComfoairQ 350 ERV unit, certified as a Passivhaus component for hot climates. To reach Passivhaus Plus, 18 solar photovoltaic panels were installed on the roof, forming a 6.7 kWp array. PHPP energy modelling indicated the home will have an annual consumption of around 4282 kWh/a, with an on-site photovoltaic generation of around 7903 kWh/a.

Links:

PEP (Plataforma Edificación Passivhaus)

iPHa (Base de datos internacional de proyectos Passivhaus)

Photos: Joan Giribet

Year: 2022

Location: Vilanova i la Geltrú, Catalonia, Spain

Architecture: SGArq Passivhaus Architecture

Services provided by Praxis: Passivhaus Certification

Passivhaus Certification Class: Passivhaus Plus

Climate zone: Warm Temperate

Floor area: 149 m2

Thermal envelope area: 475 m2

Blower Door Result: 0,6 n50

Heating Demand: 14 kWh/m2·a

Cooling Demand: 17 kWh/m2·a

Primary Energy Renewable consumption (EPR): 36 kWh/m2·a

Final Energy consumption: 29 kWh/m2·a

Renewable energy generation: 66 kWh/m2·a

CO2eq emissions: 15 kg/m2·a

Bellcaire: PHI Low Energy Building

ideadmin on 30 September 2024

Vivienda Baja Demanda Energética, Bellcaire d’Empordá

Description Located in Bellcaire d’Empordá, Catalonia, this single-family home was certified by Oliver Style as a PHI Low Energy Building. Designed by Gemma Blanes and Marina Farró from HEM Green & Balanced Architecture, and built by Evowall, the home has a compact triangular shape that takes advantage of the greater height to create two floors …

Bellcaire: PHI Low Energy Building

Passivhaus Certification, Blower Door test, Thermal bridge calculations

Description

Located in Bellcaire d’Empordá, Catalonia, this single-family home was certified by Oliver Style as a PHI Low Energy Building. Designed by Gemma Blanes and Marina Farró from HEM Green & Balanced Architecture, and built by Evowall, the home has a compact triangular shape that takes advantage of the greater height to create two floors and a double-height space in the sitting and dining room area of the house, adding spaciousness. The outdoor area features a pergola for shading in the summer months, adding a dynamic element to the building structure.

The home was built using the Evowall prefabricated steel-frame system, with a patented low-conductivity mortar and EPS and PIR insulation.

The pine timber windows frames are made by Unilux, with argon filled low emissivity double glazing, and traditional “Alicantina” shutters.

A Zehnder ComfoAir 180 balanced mechanical ventilation system with heat recovery provides comfort ventilation.

Heating and cooling are provided by an LG air-to-air heat pump with indoor ducted units. For domestic hot water, a Thermor Aeromax Split heat pump was used. Passivhaus certification was carried out by Praxis Resilient Buildings.

Links:

PEP (Plataforma Edificación Passivhaus)

iPHa (Base de datos internacional de proyectos Passivhaus)

Year: 2023

Location: Bellcaire d’Empordá, Girona, España

Architecture: HEM – Gemma Blanes / Marina Farró

Services provided by Praxis: Passivhaus Certification, Blower Door test, Thermal bridge calculations

Passivhaus Certification Class: PHI Low Energy Building

Climate zone: Warm

Floor area: 114 m2

Thermal envelope area: 481 m2

Blower Door Result: 0,8 n50

Heating Demand: 30 kWh/m2·a

Cooling Demand: 11 kWh/m2·a

Primary Energy Renewable consumption (EPR): 53 kWh/m2·a

Final Energy consumption: 42 kWh/m2·a

Renewable energy generation: 0 kWh/m2·a

CO2eq emissions: 22 kg/m2·a

Mirador de Gràcia: Passivhaus Nursing home

ideadmin on 5 February 2021

Consultoría Passivhaus para una residencia geriátrica asistida ubicada en Barcelona capital, diseñada por el despacho de arquitectura Genars y promovido por FIATC Seguros a través de FIATC Residencias (Inverfiatc).

Mirador de Gràcia: Passivhaus Care home

Passivhaus

Description

Passivhaus consultancy for an elderly people residence located in Barcelona capital, designed by Genars architecture studio and developed by FIATC Seguros through FIATC Residencias (Inverfiatc). This 6575 m2 building is in the process of Passivhaus Classic certification.

Praxis has delivered the PHPP modelling, design of the thermal envelope and airtight layer, advice on low-impact materials, and analysis and optimisation of thermal bridges and construction details.

We’ve also undertaken a thermodynamic and daylighting study of the building, using DesignBuilder (EnergyPlus & Radiance), to assess natural light levels and analyse the risk of summer overheating.

Our work has also included an audit of the mechanical and electrical systems, with proposals for improvements and compliance with the Passivhaus standard, to ensure efficient operation and low maintenance costs. Praxis has also undertaken the Blower Door testing and on-site Passivhaus supervision and quality control.

Photos: Salva Lopez y Miriam Castells

Links:

Passive House Database iPHa

Base de datos de proyectos Passivhaus PEP

Year: 2024

Location: Barcelona, España

Architecture: Joaquim Rigau – Genars

Services provided by Praxis: Passivhaus design & consultancy, thermodynamic simulation, daylighting analysis, HVAC consultancy, Blower Door testing, site supervision

Passivhaus Certification Class: Passivhaus Classic

Climate zone: Warm

Floor area: 4595 m2

Thermal envelope area: 6880 m2

Blower Door Result: 0,64 n50

Heating Demand: 11 kWh/m2·a

Cooling Demand: 10 kWh/m2·a

Primary Energy Renewable consumption (EPR): 53 kWh/m2·a

Final Energy consumption: 60 kWh/m2·a

Renewable energy generation: 61 kWh/m2·a

CO2eq emissions: 32 kg/m2·a

Borda Nova, Andorra: Multifamily Passivhaus

ideadmin on 22 November 2024

La Borda Nova, Andorra: Multiresidential Passivhaus

Description Public development with 44 social housing units, designed by architects Pau Iglesias Rodríguez and Jacint Gil Rodríguez, with Oliver Style of Praxis Resilient Buildings as Passivhaus certifier. The building is located in the city of Andorra La Vella, the capital city of Andorra. The project has a treated floor area of 3350 m2 and …

La Borda Nova, Andorra: Multifamily Passivhaus

Passivhaus Certification, thermal bridge calculations

Description

Public development with 44 social housing units, designed by architects Pau Iglesias Rodríguez and Jacint Gil Rodríguez, with Oliver Style of Praxis Resilient Buildings as Passivhaus certifier. The building is located in the city of Andorra La Vella, the capital city of Andorra.

The project has a treated floor area of 3350 m2 and includes 228 parking places, ground floor commercial premises and a roof garden.

Alongside the certification of the building, Praxis is carrying out Passivhaus component certification of the Butech (Porcelanosa) prefabricated construction system which is being installed on the façade of the building.

Links:

PEP (Plataforma Edificación Passivhaus)

iPHa (Base de datos internacional de proyectos Passivhaus)

Fotos & renders: Locubsa; Pau Iglesias y Jacint Gil

Year: 2024

Location: Andorra La Vella, Andorra

Architecture: Pau Iglesias Rodríguez – Jacint Gil Rodríguez

Services provided by Praxis: Passivhaus Certification, thermal bridge calculations

Passivhaus Certification Class: Passivhaus Classic

Climate zone: Warm Temperate

Floor area: 3350 m2

Thermal envelope area: 4796 m2

Blower Door Result: 0,6 n50

Heating Demand: 17 kWh/m2·a

Cooling Demand: – kWh/m2·a

Primary Energy Renewable consumption (EPR): 70 kWh/m2·a

Final Energy consumption: 78 kWh/m2·a

Renewable energy generation: 0 kWh/m2·a

CO2eq emissions: 17 kg/m2·a