This document discusses the scope and background of building envelopes. It notes that buildings account for a large share of final energy consumption and require a holistic policy approach. The document outlines different building types, both residential and non-residential, and discusses key factors to consider like energy perspective, policy packages, and efficient envelope technologies. It poses questions about determining the most effective policies and efficient technologies to save energy across new and existing buildings.

1. Background and scope of
the building envelope
Yamina SAHEB
Yamina.saheb@iea.org
© OECD/IEA 2011

2. Buildings sector share of the total final
energy consumption
16 000
Mtoe
Other
14 000 Buildings
12 000 Transport
Industry
10 000
8 000
6 000
4 000
2 000
0
2007 Baseline 2030 Baseline 2050 BLUE Map 2050
© OECD/IEA 2011

3. Background
 Buildings are complex systems
 Holistic approach for the envelope
 Policy package
 Regulatory instruments (codes and MEPs) and their
enforcement
 Labels and certificates and their enforcement
 Economic instruments (financial, tax, market based
instruments and direct investments)
 Efficient technologies for the envelope
 Envelope
 Insulation for walls and roofs
 Efficient windows
 Cool roofs for hot climates
 What else?
 HVAC equipment and appliances (excluded)
© OECD/IEA 2011

4. Building Types
 Residential (new and existing ones?)
 Single family residential
 Multi-family residential
 Other residential (mobile homes…???0
 Non-residential (new and existing ones?)
 Office building
 Hotel
 Education building
 Public assembly (community centres, meeting halls..)
 Health care
 Mercantile & Service
 Institutional lodging (retirement homes…)
 Other non-residential (factories,…????)
© OECD/IEA 2011

5. Energy perspective
 Energy consumption in operation phase only?
 Embodied energy?
 Which end-uses to include in the energy
balance?
 Heating and cooling only?
 Lighting?
 Ventilation?
 Other end-uses to include?
 Other criteria and impacts to consider?
© OECD/IEA 2011

6. Key questions to answer by the end of
the workshop
 Which policy packages are the most effective in
terms of energy savings?
New and existing buildings
Different building types
Regional differences?
Can we prioritize policies and how?
Main barriers and how to overcome them?
International collaboration?
© OECD/IEA 2011

7. Key questions to answer by the end of
the workshop
 What are the most efficient technologies
New and existing buildings
Different building types
Regional differences?
Cost effectiveness?
Barriers to efficient technologies deployment
International collaboration
 Is there a timing issue?
 2 separate publications; one on policies and one
on technologies or one single publication on
building envelope? © OECD/IEA 2011