BRE Bites: Passivhaus Ecobuild 20 th 22 nd March 2012

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Corey Fields
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by heating or cooling the fresh air that is introduced in order to meet the occupants ventilation

1 BRE Bites: Passivhaus Ecobuild 20 th 22 nd March 2012 Part of the BRE Trust What is Passivhaus? A Passivhaus may be defined as a building in which a comfortable internal temperature is achieved solely by heating or cooling the fresh air that is introduced in order to meet the occupants ventilation requirements Energy Efficiency Thermal Comfort passivehouse_definition.html 1

2 Passivhaus principles The reduction of the heating demand to the point where a traditional heating system is no longer required Means the typical features of a Passivhaus are : Super-insulated Minimized thermal bridging (ideally eliminate!) Extremely airtight building envelope Mechanical ventilation with heat recovery (MVHR) Triple-glazed windows, largely south oriented High thermal comfort Passivhaus dwellings do not need to differ aesthetically from conventional dwellings Passivhaus aesthetics 2

3 How low? Energy: Space heating demand <15kWh/m 2 /annum Heating load <10W/m 2 Primary energy: <120 kwh/m 2 /annum Comfort: Airtightness <0.6 50Pa Overheating <10% over 25 C Window surface >17 C Primary Energy Passivhaus regulates primary energy rather than CO 2 Energy as found in the natural environment prior to any conversion process The primary energy content of delivered energy (e.g. electricity) includes: Energy value of raw fuel input and additionally the: Overhead of fuel extraction Losses in fuel processing Losses in fuel transportation Energy conversion inefficiency Transmission loss of energy carrier 3

4 Passivhaus alongside UK Standards Sustainable Construc0on Energy performance and comfort standard Environmental Assessment Method Passivhaus Residen0al and non- domes0c PHPP BREEAM Non- domes0c & Mul0- residen0al SBEM CSH Residen0al SAP A typical UK PassivHaus? + 4

award winner Ebbw Vale Hwylus Haus @ The

5 Leeds Met. University - Carnegie Village 2 completed semi-detached units of student accommodation BREEAM Multi-residential award winner Ebbw Vale Hwylus The Works The design won the Welsh PassivHaus competition (2009) - Completion summer 2010 Re-development of former steelworks site Two 3-bed houses Timber frame construction 5

Bere Architects Ranulf Road, Camden Roof insulation 400mm mineral

insulation 400mm mineral wool Triple glazed Passivhaus certified

6 volumes/hr @ 50pa Bill Butcher, Denby Dale, West Yorkshire

6 Bere Architects Ranulf Road, Camden Roof insulation 400mm mineral wool and polystyrene Wall insulation 380mm mineral wool Floor insulation 400mm mineral wool Triple glazed Passivhaus certified windows Air pressure test: less than pa Bill Butcher, Denby Dale, West Yorkshire New-build 118m 2 three-bed detached house First UK Passivhaus to be built with cavity wall construction. One of the first certified Passivhaus homes in the UK Minimal heating - using 90% less energy for space heating than the UK average 141K build costs 6

Matrix Bau, Aubert Park, Islington 4 number of 5-storey terraced houses Potentially first multi dwelling Passivhaus in UK Airtightness level of 0.

7 Matrix Bau, Aubert Park, Islington 4 number of 5-storey terraced houses Potentially first multi dwelling Passivhaus in UK Airtightness level of 0.37 (best performing) Construction cost of 1500m² including appliances Market value 2.5million per dwelling Passivhaus certification assures a quality building Building certification Must be certified by one of the registered bodies BRE AECB Building must be completed, tested and verified with full as built design information and photographic site record Designer certification PHI exam (CEPH) BRE AECB By practice (PHI approval) Component certification Performance has been assessed and approved by PHI Windows MVHR Construction systems 7

BRE Certified Passivhaus Designer Course Globally recognised qualification 40 hours distance learning 6 days training at BRE 3 hour examination Registered on European and National databases Use of

8 BRE Certified Passivhaus Designer Course Globally recognised qualification 40 hours distance learning 6 days training at BRE 3 hour examination Registered on European and National databases Use of the CEPH logo in advertising Streamline certification for CEPH designers with BRE Thank you for listening! Twitter: helpline: passivhaus@bre.co.uk Phone helpline: +44 (0) LinkedIn: 8

Project Description. Projected build start date 01 Mar 2010 Projected date of occupation 01 Aug Energy target.

Project Description. Projected build start date 01 Mar 2010 Projected date of occupation 01 Aug Energy target. http://lowenergybuildings.org.uk Project name Larch House, Ebbw Vale, Wales Project summary The Larch House, designed by bere:architects, is the UKs first zero carbon (code 6), low cost, Certified Passivhaus,