Energy Performance of Buildings (EPBD) DirectivePublic Buildings

EAUC CaSPr Energy TSN25th January, Edinburgh

Glyn MountfordSenior Engineering Consultant

Energy Management Solutions Ltd

EPBD Requirement

• Scotland, as part of the United Kingdom along with all other EU Member States has an obligation under the Energy Performance of Buildings Directive (EPBD) to promote improvement in the energy performance of new and existing buildings.

• Requirement for energy performance assessment with certificate

• An Energy Performance Certificate (EPC) is a document which states the energy efficiency of a building based on the standardised way that the building is used.

• Carbon dioxide (CO2) ratings are shown in bandings from A to G, with A being the least polluting.

• The performance of the property is benchmarked against current building standards and cost effective improvements if applied to the building.

• For Public Buildings, the certificate (DEC) must be fixed to the building in a prominent display location e.g. Reception Area and will be valid for a period of 10 years.

What is an Energy Performance Certificate?

Do all public buildings need to display an EPC? No, this applies only to buildings which meet all of the following criteria:

• Need to comply with Non Domestic Technical Handbook, standard 6.1 and 6.9 specifically, MANDATORY

• the conditioned (heated/cooled) area of the building is over 1000m2• the building is occupied by public authorities or provides public services to a

large number of persons;• the building is frequently visited, at least weekly, by members of the general

public;• the public have a right of access to the building, or parts of the buildings

providing services directly to the public; and public funding, including part funding, is used to operate, general upkeep, or funding staff costs. Examples include colleges, community centres, libraries, hospitals, benefit offices and crematoria.

• Any building in excess of 50m² which will be rented or sold

• Any new construction, major alteration or extension greater than 50m²

What other types of building require an EPC?

• Metering• A/C system inspection (>12kW)

Other Requirements

Updates 2007 Technical Handbook

I need an EPC – What do I do next?

You must ensure that the EPC is :

• produced using EPBD compliant methodologies/software from an accredited individual

• affixed to the building in a prominent place

• in place by 4 January 2009

Who can Provide me with an EPC?

• The Scottish Building Standards Agency (SBSA) is entering into protocols with a number of organisations and professional bodies whose members have the qualifications and experience to produce EPCs.

• Chartered Institute of Building Services Engineers (CIBSE)* protocol agreement • Association of Building Engineers (ABE) protocol agreement • Energy Institute (EI)  protocol agreement • Royal Institute of Chartered Surveyors (RICS) protocol agreement • Building Research Establishment (BRE)* (establishing protocol with SBSA)• Heating & Ventilation Contractor’s Association (HVCA) (establishing protocol with SBSA)

*Note both BRE and CIBSE now have approved Energy Assessor Schemes which are also approved by Communities and Local Government (CLG) in England and Wales

How can I calculate an indication of carbon dioxide emissions?

• Simplified Building Energy Model (SBEM)• Other tools, including detailed simulation Modelling (DSM) (complex

design)

How should the building be measured?

• Entire area of the building occupied by the public authority, not just the area open to the public.

EPC Calculation Guidelines

Who has responsibility for affixing an EPC?• The building owner

Where should the EPC be placed? • Area visible to public, e.g. lobby or reception area.

The EPC must include• current carbon dioxide emissions,• potential emissions on an annual basis• potential energy use of the building• list of cost effective improvements (improvement plans which show future

upgrades may also be displayed next to the EPC).

EPC Display Guidelines

Will the information on the EPC be recorded anywhere?

• This information must be recorded on the Building Standards Register held by the local authority where the building is located.

When should an EPC be updated?

• An individual EPC will only be valid for a period of ten years

National Calculation Methodology

National Calculation Tool• SBEM / iSBEM• Other Dynamic Simulation Modelling (DSM) Software – IES VE, TAS, Hevacomp

NCM requires following approach:National Building – size, shape, activity, orientation, 2002 standards• Target Emission Rating – 2006 IF, LZC Benchmark• Predicted Building Energy Rating

Assessors Requirements• Member of Protocol Organisation and Trained in SBEM or approved NCM software• Qualified as an accredited energy assessor through competent person scheme• CIBSE and BRE have recognised competent assessor schemes• Demonstrated competency in software

EPC - Data Collection

• Difficult and time consuming• Methodology required dependent on approved software • The following data requires collation:

– General Building Data Address Type , Owner Detail, Certifier Detail etc– Project Detail – Construction Details, walls roof etc– Geometry – Building Type, Activity, Air Permeability, Orientation– Geometry Selector – Zone, Envelope, Doors, Windows, Building Height & m²– Building Services – HVAC, DHW Gen, Solar, PV, Wind, Lighting, Lighting

Controls

SBEM Building Rating

Building Energy Performance

Data Collection Formats

Documents and Information needed for the Simplified Building Energy Model calculations:

• Site Plan (with scale and building orientation)• Energy Bills (with details of kWh and power factor• Building Area (m2)• Date of construction• Date and details of any upgrades

Data Collection Cont.

Room Ref

Zone Ref if Applicable

Description Building type (Office, corridor

etc...)

Activity Area (m2)

Height (m)

Which HVAC system*?

DHW generator ?

lamp type Lighting controls

                   

Project DetailsConstruction for: General description (materials...) %

GlazedU-ValueW/m2

External Walls

Internal Walls

Roof

Ceiling

Floors

Doors

Glazing

Data Collection Cont.Building services Details of equipment Efficiency

(%)Installed

before 1998 (Yes/No)

Heating

HVAC

Domestic Hot Water

Data Collection Cont.Type (details of equipment) Area

(m2)

Orientation (N, NE,

W, etc...)

Inclination (Degree

s)

Solar Energy

Type (details of equipment: Turbine Diameter, Hub Height, Power kW)

Terrain type

Wind Generators

Data Collection Cont.

Details of Building Leakage, Duct Leakage and Fan efficiency tests

Building Leakage

Duct Leakage

Fan Efficiency

What needs to be done??

• Identify which buildings require EPC’s and DEC’s• Consider what data required and in what form the data is e.g. drawings,

manuals, possible inspection required, etc• Who will collate the data, internal or external?• Will a site audit or similar be required to collate the data?• Methodology for data correlation• Who will carry out building assessments – must be accredited energy

assessor, in-house personnel who are accredited can perform• Above may depend on level of complexity of building/s and number of

buildings• What tool is suitable – CLG (England and Wales) have defined 3 levels

of building complexity, production of certificates

Energy Management Solutions Contact Details

Glyn MountfordSenior Engineering Consultant17 Corstorphine RoadEdinburghEH12 6DDPhone: 0131 346 3214Fax: 0131 777 2747g.mountford@ems.org.uk