Larixhaus: straw bale and timber passive house
Last modified by the author on 01/02/2014 - 16:02
New Construction
- Building Type : Isolated or semi-detached house
- Construction Year : 2013
- Delivery year : 2013
- Address 1 - street : C/Ponent 18 08178 COLLSUSPINA, España
- Climate zone :
- Net Floor Area : 94 m2
- Construction/refurbishment cost : 113 800 €
- Number of Dwelling : 1 Dwelling
- Cost/m2 : 1210.64 €/m2
Certifications :
-
Primary energy need
96 kWhpe/m2.year
(Calculation method : Primary energy needs )
Welcome to the first pre-fabricated straw bale passive house on the Iberian Peninsula. The Larixhaus is a single family home split over two floors, located in the town of Collsuspina, 70 km north of Barcelona, Catalonia, Spain.
The timber superstructure and external cladding is PEFC certified. Healthy indoor air quality is achieved by using non-toxic natural materials, with whole house ducted heat recovery ventilation. Embodied energy and CO2 emissions over the life cycle are minimised by prioritising the use of natural, non-toxic, renewable building materials.
Through careful bio-climatic design, thermal insulation with straw, an airtight envelope and triple glazed windows, the Larixhaus has a projected space heating demand (calculated with PHPP) of 15 kWh/m2.a, approximately 80% less than that required by the current Spanish Building Regulations. Summer comfort is achieved through the careful choice and orientation of opening areas with external shading devices on the southern façade.
Pre-fabrication allows for rapid on-site assembly, pre-installation of the airtight layer and window frames, with associated cost savings and near-zero on-site waste.
See more details about this project
http://www.passivhausprojekte.de/index.php?lang=en#d_3874Data reliability
Assessor
Stakeholders
Thermal consultancy agency
Oliver Style, ProGETIC SCP
http://progetic.com/index.php/es/Construction company
Oliver Style, Vicenç Fulcarà, ProGETIC SCP
http://progetic.com/index.php/es/Developer
Jordi Vinadé, Itziar Pagès
http://larixhaus.cat/Construction Manager
Albert Fargas - FARHAUS
http://farhaus.com/Designer
Nacho Martí Morera, Maria Molins, Oriol Martí
[email protected] Tel: 938 840 419
Manuel García Barbero - KLIMARK
http://www.klimark.com/Others
Marc Garriga, Joan González
Other consultancy agency
Micheel Wassouff - ENERGIEHAUS [Blower Door Test]
http://www.energiehaus.es/Contracting method
Maximum Guaranteed Price
Owner approach of sustainability
The owners wanted to a home where natural materials (such as timber and straw), comfort and energy efficiency were given priority over architectural design and floor area
Architectural description
Simple and elegant, with a compact design and larch cladding finish that will weather over time.
Building users opinion
The users are satisfied with the thermal comfort and energy efficiency of the home. Recently outdoor temperatures where reaching -3ºC, with indoor temperaturas remaining above 20ºC without active heating. They report that it is quiet and comfortable. Monitoring is planned to fully evaluate the thermal performance and air quality of the home.
Energy consumption
- 96,00 kWhpe/m2.year
- 284,00 kWhpe/m2.year
- 55,00 kWhfe/m2.year
Envelope performance
- 0,21 W.m-2.K-1
- 0,34
- 0,32
Systems
- Electric radiator
- Others
- Heat pump
- No cooling system
- Double flow heat exchanger
- Other, specify
- 22,00 %
GHG emissions
- 25,00 KgCO2/m2/year
- 100,00 year(s)
Indoor Air quality
Product
Zehnder ComfoAir 350
Zehnder
http://www.zehnder.es/
PHI Certified heat recovery ventilation unit with heat recovery efficiency of 90%
Comfort ventilation up to 370 m³/h
Low power consumption with DC motors
Automatic 100% summer bypass
Frost protection function: efficient even at low temperatures
Optional integrated preheater and humidity control
Wireless remote control and filter replacement indicator
Theodoor 300 PLUS
Theodoor
http://www.georenova.com/
Thermodynamic compact air-source heat pump for hot tap water [DHW]300 litre capacity0.88 electrical : 3.6 kW thermal COP = 3.75 @ air 15ºC / water 45ºC
Energy bill
- 350,00 €