Casa Sg Magi, Sitges: EnerPHit Plus

ideadmin on 2 September 2024

Casa SG Magi: a deep energy retrofit in Sitges

Casa Sg Magi, Sitges: EnerPHit Plus

Passivhaus Certification

Description

Casa SG Magi: EnerPHit Plus deep energy retrofit in Sitges

Designed by Sergi Gargallo from the SgARQ Passivhaus Architecture and certified by Oliver Style from Praxis Resilient Buildings, this single-family home has achieved the EnerPHit Plus certification, thereby reducing the home’s energy consumption by around 90%.

Consisting of ground floor and first, the house has a useful floor area of 82 m². Outer walls are fitted with 120mm of EPS external thermal insulation (ETICS) made of 120 mm of EPS, with 200 mm of XPS insulation on the roof is insulated with, and 100 mm on the floor slab. The Blower Door test result was n50 = 0.69 air changes per hour (ach), well below the EnerPHit límit of n50 = 1 ach. An existing home in Spain typically has an air permeability of around n50 = 10 ach.

The windows consist of WERU Afino One PVC frames, with triple-glazed low-emissivity windows filled with argon gas.

A Zehnder Comfoair Flex 250 sensible heat recovery unit takes care of mechanical ventilation.

Space heating and cooling consists of two Panasonic CU-Z25UBEA air-to-air heat pumps, one on each floor (2 x 2.5 kW for cooling and 2 x 3.2 kW for heating), with ducted indoor split units.

Nine roof mounted 455 Wp photovoltaic panels produce around 32% more energy than the home consumes.

Praxis undertook the Passivhaus audits and certification for the project, as well as completing the 2D thermal bridge calculations to ISO 10211, assessing heat loss and minimum temperatures in all the construction details.

Links:

Pep – (Spanish Passivhaus Platform)
iPHa– (International Passivhaus Projects Database)

Photos: Juan Giribet de Sebastián

Year: 2023
Location: Sitges, Catalonia, Spain
Architecture: SgARQ Passivhaus Architecture
Services provided by Praxis: Passivhaus Certification, thermal bridge calculations
Passivhaus Certification Class: EnerPHit Plus
Climate zone: Warm
Floor area: 82 m2
Thermal envelope area: 347m2
Blower Door Result: 0,69 n50
Heating Demand: 16 kWh/m2·a
Cooling Demand: 21 kWh/m2·a
Primary Energy Renewable consumption (EPR): 61 kWh/m2·a
Final Energy consumption: 49 kWh/m2·a
Renewable energy generation: 83 kWh/m2·a
CO2eq emissions: 26 kg/m2·a

Casa Sg Garona: Low Energy Building

ideadmin on 2 September 2024

Single-family home in Sant Pere de Ribes, south of Barcelona, designed by Sergi Gargallo from the SgARQ Passivhaus Architecture and certified by Oliver Style from Praxis Resilient Buildings as a PHI Low Energy Building.

Casa Sg Garona: Low Energy Building

Passivhaus Certification

Description

The home, over a ground floor and first, has a treated floor area of 135 m2. Outer walls are insulation 100mm of mineral wool insulation, with 150mm of XPS insulation on the roof and 100mm on the floor slab.

The windows consist of WERU Afino One PVC frames, with triple-glazed low-emissivity windows filled with argon gas.

The Blower Door test result was n50 = 0.6 air changes per hour (ach), well below the PHI Low Energy Building limit of n50 = 1 ach.

Mechanical ventilation with heat recovery is taken care of with a JAGA Orcon HRC-350-MaxComfort unit.

A Samsung air-to-water heat pump with indoor ducted fan coil units provides heating and cooling. The same heat pump generates domestic hot water.

12 roof mounted 350 Wp photovoltaic panels produce around 60% of the energy that the home consumes.

Praxis did the Passivhaus certification, which included a detailed revision of the architectural and HVAC design documentation, the PHPP and thermal bridge calculations, the Blower Door test report, the ventilation system commissioning, and construction photographs, to ensure that the Passivhaus Low Energy Building criteria were met, both on paper and in real life.

Links:

PEP (Spanish Passivhaus Platform)
iPHa (International Passivhaus Projects Database)

Photos: Joan Giribet

Year: 2023
Location: Sant Pere de Ribes, Barcelona
Architecture: SgARQ Passivhaus Architecture
Services provided by Praxis: Passivhaus Certification
Passivhaus Certification Class: PHI Low Energy Building
Climate zone: Warm
Floor area: 135 m2
Thermal envelope area: 583 m2
Blower Door Result: 0,6 n50
Heating Demand: 25 kWh/m2·a
Cooling Demand: 26 kWh/m2·a
Primary Energy Renewable consumption (EPR): 72 kWh/m2·a
Final Energy consumption: 60 kWh/m2·a
Renewable energy generation: 36 kWh/m2·a
CO2eq emissions: 22 kg/m2·a

Terrassa Haus: multi-family Passivhaus Classic

ideadmin on 27 March 2024

Terrassa Haus is the first multi-residential building to receive Passivhaus certification in the city of Terrasa, Catalonia, Spain. The project was developed by Cambolico and designed by architects Antoni Espona & Xavier Torcal. Oliver Style and Bega Clavero from Praxis Resilient Buildings carried out the Passivhaus consultancy, HVAC design and Blower Door testing.

Terrassa Haus

Passivhaus Consultancy

Consultoría Passivhaus - Terrassa Haus. Terraza

Consultoría Passivhaus - Terrassa Haus. Salón

Consultoría Passivhaus - Terrassa Haus. Habitación

Consultoría Passivhaus - Terrassa Haus. Oficina

Consultoría Passivhaus - Terrassa Haus. Exterior edificio

Description

The ground floor offers 2 commercial spaces, with a further three floors with apartments ranging from 76 m2 to 154 m2. The building has a total floor area of 1142m2 and includes a communal co-working space, bike room, gym, and communal pool.

With an existing concrete structure that had been abandoned during the economic crisis of 2007, an external thermal insulation system with EPS insulation was applied over ceramic brick and rendered, with a further 5cm of Knauf Insulation mineral wool inside in the service void. The roof is insulated with XPS insulation. Rehau PVC windows frames with argon-filled low-e coated glazing make up the openings, with Swisspacer insulated glazing spacers to further reduce heat loss.

Heating, cooling and hot water is provided by individual Hitachi all-in-one heat pumps in each apartment. Similarly, mechanical ventilation with heat recovery is provided by individual Soler & Palau Passivhaus certified ventilation units, with intake air drawn in from the façade walls and stale air extracted to the roof with shared extract ducts.

Links:

Pep – iPHA

Photos: Terrassa Haus

Year: 2023
Location: Terrassa, Barcelona, España
Architecture: Antoni Espona & Xavier Torcal
Services provided by Praxis: Passivhaus Consultancy, thermal bridge calculations, building physics, heating-cooling-DHW-ventilation system design, Blower Door airtightness tests
Passivhaus Certification Class: Passivhaus Classic
Floor area: 1.142 m2
Thermal envelope area: 1.500 m2
Blower Door result: 0,6 n50
Heating Demand: 10 kWh/m2·a
Cooling Demand: 15 kWh/m2·a
Primary Energy Renewable consumption (EPR): 60 kWh/m2·a
Final Energy consumption: 50 kWh/m2·a
Renewable energy generation: 0 kWh/m2·a
CO2eq emissions: 18 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 Nursing home

Passivhaus and nZEB

¡Las residencias Masies de Mollet & Mirador de Gracia logran n50=0,6 ren/h en sus ensayos finales de Blower Door!

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.

Year: 2024

Location: Barcelona

Services:
Passivhaus consultancy, thermodynamic simulation, daylighting analysis, M & E consultancy, Blower Door testing

ICONIC: High performance sports centre, Andorra

praxisadmin on 10 January 2023

Cramea: centro deportivo de alto rendimiento

Description Passivhaus design and consultancy for a high-performance sports centre located at 2600 metres above sea level in El Pas de la Casa, Andorra. This 9000 m2 building, designed by Engitec, is in the process of Passivhaus Classic certification. Praxis has done the PHPP energy modelling, design of the thermal envelope and airtight layer, advice …

Cramea, High performance sports centre

Passivhaus

Description

Passivhaus design and consultancy for a high-performance sports centre located at 2600 metres above sea level in El Pas de la Casa, Andorra. This 9000 m2 building, designed by Engitec, is in the process of Passivhaus Classic certification.

Praxis has done the PHPP energy 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 undertaken thermodynamic analysis of the building, using Design Builder (EnergyPlus), to assess thermal comfort and analyse the risk of summer overheating in critical zones in the building.

We have also consulted on mechanical and electrical system design, with proposals for improvements and compliance with the Passivhaus standard, to ensure efficient operation and low maintenance costs. Finally, we have provided with on-site Passivhaus supervision and quality control.

Year: 2022

Location: El Pas de la Casa, Andorra

Services Passivhaus design & consultancy, thermodynamic simulation, M & E consultancy, and site supervision

El Niu: multi-residential Passivhaus Plus

ideadmin on 3 April 2024

El Niu, Plurifamiliar Passivhaus - Exterior

El Niu, meaning the “Nest” in Catalan, is Andorra’s first multi-residential Passivhaus Plus certified building, and was certified by Oliver Style of Praxis Resilient Buildings, developed by Lluis Lopez Castro of Propietats y Gestió, and designed by Antoni Martí.

El Niu: multi-residential Passivhaus Plus

Passivhaus Certification

El Niu, Plurifamiliar Passivhaus - Exterior detalle

Description

Nestled up at 1275 meters above sea level, El Niu houses 11 dwelling units with a total TFA of 1292 m2 over 4 floors.

Heating and hot water is provided by Pichler PKOM 4 compact heat pump units, providing heat recovery ventilation, heating, cooling, and hot water generation.

The façade consists of two different steel frame systems: the Passivhaus certified Passivhaus External Wall System by Knauf Insulation, and the Archisol and Promisol systems by Arcelor Mittal.

A 37,7 kWp solar PV array is projected to generate 91 % what the building consumes, turning it into a nearly net-zero energy powerhouse that uses approximately 71% less than pre-2010 buildings en Andorra, while emitting only 5976 kg of CO2eq per annum.

Links:

PEP (Spanish Passivhaus Platform)

iPHa (International Passivhaus Projects Database)

Photos: Lluis Lopez Castro

Year: 2024
Location: Ordino, Andorra
Architecture: Despatx d’arquitectura Antoni Martí
Services provided by Praxis: Passivhaus Certification, thermal bridge calculations
Passivhaus Certification Class: Passivhaus Plus
Floor area: 1.292 m2
Thermal envelope area: 2.677 m2
Blower Door result: 0,6 n50
Heating Demand: 20 kWh/m2·a
Cooling Demand: – kWh/m2·a
Primary Energy Renewable consumption EPR: 37 kWh/m2·a
Final Energy consumption: 31 kWh/m2·a
Renewable energy generation: 28 kWh/m2·a
CO2eq emissions: 11 kg/m2·a

Casa Oeste, Rupia: Low energy home

ideadmin on 27 March 2024

Single family home in Rupia, Girona, Catalonia, designed by the Nordest Arquitectura and built by Evowall. Oliver Style and Bega Clavero of Praxis Resilient Buildings were Passivhaus consultants for the project. The building has been certified as a PHI Low Energy Building.

Casa Oeste, Rupia

Passivhaus Consultancy

Consultoría Passivhaus - Casa Oeste. Interior

Consultoría Passivhaus - Casa Oeste. Vista aérea

Consultoría Passivhaus - Casa Oeste. Exterior

Description

The home is built with the Evowall steel-frame prefabricated construction system, consisting of a proprietary low-conductivity mortar, EPS and PIR insulation, with the outer walls either rendered or finished with rammed earth blocks.

Timber window frames and low-e argon filled solar control glazing make up the openings.

Ventilation is provided with a Zehnder balanced mechanical ventilation system with heat recovery.

Heating and cooling are with an air-to-air mini VRF Panasonic heat pump with five ducted indoor split units. Domestic Hot Water is supplied by a Panasonic air-to-water heat pump. A roof-mounted 8,1 kWp solar PV generator generates a projected 124% of the home’s total energy consumption.

Links:

Pep – iPHA

Photos: Evowall

Year: 2023
Location: Rupia, Girona, España
Architecture: Nordest Arquitectura SLP
Services provided by Praxis: Passivhaus Consultancy, thermal bridge calculations, building physics, heating-cooling-DHW-ventilation system design, Blower Door airtightness tests
Passivhaus Certification Class: PHI Low Energy Building
Floor area: 173 m2
Thermal envelope area: 778 m2
Blower Door result: 1 n50
Heating Demand: 30 kWh/m2·a
Cooling Demand: 10 kWh/m2·a
Primary Energy Renewable consumption (EPR): 41 kWh/m2·a
Final Energy consumption: 45 kWh/m2·a
Renewable energy generation: 48 kWh/m2·a
CO2eq emissions: 18 kg/m2·a

El Refugi: Passivhaus Classic Single Family Home

ideadmin on 13 September 2024

Developed by Rotllada Immobiliaris, designed by architect Rossend Prat Ribera, with site supervision by Technical Architect Àlex Vidal, Praxis has carried out Passivhaus Design

El Refugi: Passivhaus Classic Single Family Home

Passivhaus Consultancy

Description

Developed by Rotllada Immobiliaris, designed by architect Rossend Prat Ribera, with site supervision by Technical Architect Àlex Vidal, Praxis has carried out Passivhaus Design, Blower Door tests, thermal bridge calculations and HVAC system design for this single-family home that has achieved Passivhaus Classic certification.

With a treated floor area of 104 m², the walls and roof of the home are built with a lightweight timber frame structure, 140 and 220 mm thick respectively, with mineral wool between studs and beams. The exterior walls have a ventilated façade system.

The windows consist of PVC frames, with triple low-e argon filled glazing and exterior blinds. Heating and cooling are supplied by an air-to-water heat pump, DeDietrich Strateo, with ducted indoor fan coil units. Domestic hot water is produced with the same heat pump. Balanced whole-house mechanical ventilation is provided by a Siber sensible heat recovery unit.

Links:

PEP (Spanish Passivhaus Association)
iPHa (International Passivhaus Projects Database)

Year: 2023
Location: Sant Vicenç de Torelló, Catalunya, Spain
Architecture: Rosend Prat Ribera Arquitecte
Services provided by Praxis: Passivhaus Consultancy, building physics, thermal bridge calculations, Blower Door airtightness testing
Passivhaus Certification Class: Passivhaus Classic
Climate zone: Warm-Temperate
Floor area: 104 m2
Thermal envelope area: 443 m2
Blower Door Result: 0,6 n50
Heating Demand: 15 kWh/m2·a
Cooling Demand: 7 kWh/m2·a
Primary Energy Renewable consumption (EPR): 51 kWh/m2·a
Final Energy consumption: 44 kWh/m2·a
Renewable energy generation: 0 kWh/m2·a
CO2eq emissions: 23 kg/m2·a

Casa Este, Rupia: Low energy home

ideadmin on 27 March 2024

Single family home in Rupia, Girona, Catalonia, designed by the Nordest Arquitectura and built by Evowall. The building was designed to meet PHI Low Energy Building standard, with Oliver Style and Bega Clavero of Praxis Resilient Buildings as Passivhaus consultants.

Casa Este, Rupia: Low energy home

Passivhaus Consultancy

Consultoría Passivhaus - Casa Este. Entrada

Consultoría Passivhaus - Casa Este. Interior

Consultoría Passivhaus - Casa Este. Interior detalle

Consultoría Passivhaus - Casa Este. Exterior lateral

Consultoría Passivhaus - Casa Este. Vista aérea

Description

Timber window frames and low-e argon filled solar control glazing make up the openings.

Ventilation is with a Zehnder balanced mechanical ventilation system with heat recovery.

Heating and cooling are with an air-to-air mini VRF Panasonic heat pump with five ducted indoor split units. Domestic Hot Water is supplied by a Panasonic air-to-water heat pump.

A roof-mounted 8,1 kWp solar PV generator generates a projected 92% of the home’s total energy consumption.

Links:

Pep – iPHA

Photos: Evowall

Year: 2023
Location: Rupia, Girona, España
Architecture: Nordest Arquitectura SLP
Services provided by Praxis: Passivhaus Consultancy, thermal bridge calculations, building physics, heating-cooling-DHW-ventilation system design, Blower Door airtightness tests
Passivhaus Certification Class
Floor area: 179 m2
Thermal envelope area: 769 m2
Blower Door result: 2,4 n50
Heating Demand: 30 kWh/m2·a
Cooling Demand: 8 kWh/m2·a
Primary Energy Renewable consumption (EPR): 46 kWh/m2·a
Final Energy consumption: 59 kWh/m2·a
Renewable energy generation: 49 kWh/m2·a
CO2eq emissions: 18 kg/m2·a

Ca Na Lola: Passivhaus Plus home, Mallorca

ideadmin on 20 July 2023

Ca Na Lola: Mediterranean Passive House

Passivhaus

Description

Ca Na Lola is a single-family home located in Campos, Mallorca, which has achieved Passivhaus Plus certification. The home has a very low level of air infiltration, with a Blower Door test result of 0.38 ach at 50 Pa. A solar photovoltaic generator installed in the garden generates approximately twice as much energy as the house consumes in an average year.

Ca Na Lola has a timber structure with wood fibre insulation and a mineral mortar render as an exterior finish. The windows are shaded with external blinds and a pergola adds further shading on the south façade.

Mechanical ventilation with heat and moisture recovery is taken care of by a Zehnder Comfoair Q350 ERV unit with Passivhaus component certification for hot climates, recovering both heat and moisture.

A Mitsubishi air-to-water heat pump produces domestic hot water. A second Mitsubishi VRV heat pump delivers underfloor heating and cooling through ducted split units.

Links:

Spanish Passivhaus Platform (PEP) project database

International Passivhaus Projects database

Year: 2022

Location: Campos, Palma de Mallorca, Islas Baleares

Services:
Passivhaus Consultancy