Published on March 4, 2014
BRE: European Passiv Haus research projects Ross Holleron & Colin King Building Futures & BRE Wales Part of the BRE Trust
EuroPHit Retrofitting for the energy revolution, one step at a time
Reducing energy consumption High efficiency EU’s 2020 objective: All new/refurbished buildings as NZEBs (Nearly Zero Energy Buildings) Low efficiency
All at once….. NZEB • competence • motivation • financing • life cycle of existing components Building stock • disturbance of inhabitants
...Or step by step EnerPHit + RES Retrofit step by step Building stock • dissemination • suitable products • financing instruments • pilot projects • criteria and softare tool EuroPHit
What is step-by-step retrofit? 1. Components step-by-step Building stock Insulation Windows, airthightness & ventilation RES & heating system
What is step-by-step retrofit? 2. Facades / Sides / parts step-by-step Building stock North side South side + windows, airtightness & ventilation Rest + RES & heating system
Airtightness measures count You can achieve the same airtightness in a retrofit as you can in Passive House new builds n50 after retrofit: 0.35 h-1 airtight film gasket, external render rendering (outside)
Ventilation is key Ventilation always makes sense: when you remove humidity, you lower the risk of moisture damage • Typically more difficult to remove thermal bridges • New windows have a significant effect on air tightness • Important to use an efficient ventilation system
Key project outcomes • Criteria and certification scheme for EnerPHit retrofits ‘step-by-step’ • Financing models and market incentive programmes • Design concepts and guidelines for high performance components • Version of PHPP modelling tool for ‘step-by-step’ retrofits • Training materials and workshops • Building case studies
Wilmcote House – Portsmouth Council ECD lead architects • 1968 Bison REEMA prefabricated concrete system • Poor state of cosmetic and structural repair • < 30 years life expectancy without major works • Refurbish rather than replace due to tenant disruption • Circa £12 million budget
Energy efficient step-by-step refurbishments Facilitating the transition to a Nearly Zero Energy society by: retrofit Stimulating demand for financial and one-stop-shop solutions step Building quality assurance & certification Case study findings from across the EU by Driving the development of products, materials and design concepts Training for designers and craftsmen Poor efficiency building stock step EnerPHit +RES
Building for the Energy Revolution PassREg – Passive House Regions with Renewable Energy INSERT YOUR LOGO HERE www.passreg.eu
Building for the energy revolution In the face of climate change, the EU has set ambitious goals The building sector represents 40% of our carbon emissions The EU Energy Performance of Buildings Directive (EPBD) – All new builds must be Nearly Zero Energy Buildings (NZEBs) by 2020; all public buildings by 2019 – NZEBs must be cost effective over their lifecylce – NZEBs must be supplied by Renewable Energy Solutions where possible We need solutions! PassREg has answers...
Passive House: a solid basis Passive House makes renewables feasible Energy efficiency first! Passive House reduces energy demand such that it becomes more feasible and economical to supply remaining energy needs with renewable technologies, onsite or nearby © Wamsler Architects
The PassREg project 14 Partners. 11 Countries. 3 Years. 1 Goal. Supporting the growth of Passive House regions to implement EU ‘near zero energy’ goals in buildings from 2020 – PassReg helps aspiring regions succeed by: – Investigating successes – Making them known and accessible – Building up training, quality assurance and certification infrastructure – Stimulating the market for suitable products and professionals
Key outputs of PassREg – New Passivhaus buildings + RES throughout partner countries as case studies (Carmarthenshire school) – A ‘Success Guide’ detailing successes in frontrunner regions © Passive House Institute – A ‘Set of Solutions’ detailing individual solutions and resources – International and regional events and study tours – Wider network of ‘Passivhaus aware’ professionals in the regions © Passive House Institute
Key outputs of PassREg PassREg has developed new training for Passivhaus Designers on: – Integrated Design – Integration of Renewable Energy Supply in Passivhaus – Energy efficient cooling These will be integrated into Passivhaus Designer training in due course © Passive House Institute
Activities to date (focus on Wales as test bed) – Research key actions and activities that have led to success in other EU regions – Work with key players (LA Development Managers, Planners, Building Control, etc) to raise awareness of Passivhaus – Investigate ways of funding/ justifying any cost uplifts (lifecycle costing) – Help with the initial design principles of a pilot project, with additional focus on use of local resources & supply chain – Investigate reasons for differences in calculation methods (PHPP vs NCM) for greater clarity amongst building professionals – Roll out regional training for designers and tradespeople Strategies and policies for implementation Awareness raising with LAs Overcome financial difficulties Overcome technical difficulties Training for industry
Burry Port Primary School Passivhaus pilot – Council piloting Passivhaus on a new primary school (extension, <1000m2) – Reduced running costs and high energy efficiency – Occupant comfort and internal environment important – Would like to implement the principles (at least) on future projects
Key features of the school from initial feasibility – Large southerly glazed area for winter solar gains (shading for summer) – Partial two storey arrangement helped to improve surface area: volume ratio – Very low U values: – Walls: 0.101 W/m2K – Roof: 0.101 W/m2K – Floor: 0.130 W/m2K – Very low (aiming for zero) thermal bridging – Airtightness (max) 0.6 ac/h – Architects (Archetype) will investigate cross flow and night cooling strategies
Project partners Passive House Institute (DE) iPHA (DE) Passiefhuis-Platform (BE) Plate-forme Maison Passive (BE) EnEffect Group (BG) DNA in de Bouw (NL) City of Zagreb (HR) End Use Efficiency Research Group, Politecnico di Milano (IT) IG Passivhaus Tyrol (AT) Environmental Investment Fund (LT) Municipality of Cesena (IT) Nobatek (FR) BRE Wales (UK) proKlima (DE) Burgas Municipality (BG)
#brelive Please get involved! www.europhit.eu www.passreg.eu
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