1. Simon Pezzutto, Franziska Haas, Dagmar Exner 23.03.2017
Europe´s Building Stock and its Energy Demand: a Comparison between Austria and Italy
Simon Pezzutto, Franziska Haas, Dagmar Exner

2. CONTENT 1. MOTIVATION 2. INTRODUCTION 3. METHODOLOGY 4. MAIN RESULTS
5. DISCUSSION (COMMENTS ABOUT DATA AVAILABILITY)

3. 1. MOTIVATION H2020 Hotmaps Project, WP2 – Task 2.1:
Hotmaps: Heating and Cooling - Open Source Tool for Mapping and Planning of Energy Systems
WP2: Open Data Set for EU-28
Task 2.1: Building Stock Analysis

4. 2. Introduction
Buildings sector is responsible for approximately 40% of EU’s total primary energy demand
Mainly (75%) attributed to:
i.) Space heating ~ 2,900 [TWh/a]
ii.) Domestic hot water ~ 400 [TWh/a]
iii.) Space cooling ~ 200 [TWh/a]

5. 3. METHODOLOGY Data collection - scientific literature analysis:
TABULA (IEE), BPIE - DATA HUB FOR ENERGY PERFORMANCE OF BUILDINGS, STATISTIK AUSTRIA – ISTAT
Construction periods:
i.) Before World War II (1945)
ii.) After World War II and before 1960
iii.) and 1980
iv.)
v.)
vi.)
vii.) Post 2010 y]

6. 3. METHODOLOGY Constructed floor area per period [Mm²]
Energy demand: Space heating, DHW, space cooling [kWh/m² a]
Building characteristics: U-values, façade types, type of glazing, saddle or flat roof, construction materials, technologies
applied, tenure/ownership, occupancy etc.
Building typologies: a.) Residential: SFHs, MFHs and ABs (> 8 floors)
b.) Service: Office* (Office flats – Office buildings), Trade, Health,
Education, Sport, Hotels, Restaurants and Other non-
residential buildings
* Status quo of the work progress for the service sector

7. 4. MAIN RESULTS Residential Sector: Construction Period [Mm²] AUSTRIA
ITALY

8. 4. MAIN RESULTS
Residential Sector: Building Type [Mm²]
AUSTRIA
ITALY

9. 4. MAIN RESULTS Service (Office) Sector: Construction Period [Mm²]
AUSTRIA
ITALY

10. 4. MAIN RESULTS Service (Office) Sector: Building Type [Mm²] AUSTRIA
ITALY

11. 4. MAIN RESULTS Ownership Structure – Residential Sector [Mm²]
Austria:
- Owner occupied (57%)*, **
- Rented (40%)
- Other (3%)
Italy:
- Owner occupied (92%)
Social housing (4%)
State, region, municipalities (2%)
Commercial (1%)
- Other (1%)
* 7% of the total Austrian ownership structure regarding the residential building stock belongs to social housing
** Data for state, region, municipalities and commercial ownership structure are missing

12. 4. MAIN RESULTS
Ownership Structure – Service (Office) Sector [Nr. of buildings]
- Single ownership (41%)
- Multiple ownership (41%)
- Other (18%)
AUSTRIA
ITALY
Italy: no data for the subdivision of the Italian ownership structure (service building stock) was found

13. 4. MAIN RESULTS
Residential sector: development of the space heating and DHW preparation demand
ITALY
AUSTRIA

14. 4. MAIN RESULTS
Residential and Service (Office) sector: development of U-values (walls, windows, roofs, and floors)
AUSTRIA
ITALY
Walls
Windows
Roofs
Floors
Walls
Windows
Roofs
Floors
Before 1945
1.60
3.30
1.30
1.70
0.80
0.90
2.30
0.60
1.00
0.70
2.10
0.40
0.50
1.50
0.30
0.20
Post 2010
0.35
1.40
Before 1945
1.80
5.40
2.20
1.90
1.60
2.00
4.60
1.70
1.00
4.10
1.20
1.40
0.90
4.00
1.30
Post 2010
0.37
2.37
0.33
Residential
Walls
Windows
Roofs
Floors
Walls
Windows
Roofs
Floors
Before 1945
0.70
3.20
1.10
1.20
0.63
3.40
1.50
0.67
2.40
0.60
1.00
0.57
2.10
0.40
0.48
1.40
0.30
0.50
0.32
1.30
0.20
Post 2010
0.35
Before 1945
1.20
5.50
0.80
1.30
4.90
0.50
4.20
3.60
0.60
2.60
1.40
Post 2010
0.37
2.37
0.33
Service
(Office)

15. 4. MAIN RESULTS
Service (Office) sector: development of the space heating and DHW preparation demand
ITALY
AUSTRIA

16. 4. MAIN RESULTS
Residential sector: development of the space cooling demand
ITALY
AUSTRIA

17. 4. MAIN RESULTS
Service (Office) sector: development of the space cooling demand
ITALY
AUSTRIA

18. 5. DISCUSSION - COMMENTS ABOUT DATA AVAILABILITY
There is a lack of data concerning space cooling
The terms energy demand and consumption are erroneously used interchangeably
Inconsistency between data sources
DHW values for the service sector

19. 5. DISCUSSION - COMMENTS ABOUT DATA AVAILABILITY
While the Austrian & Italian building stocks are well investigated there still is a lack of information concerning energy demand values for space heating, DHW and space cooling according to the different construction periods.
Constructed floor area
Residential part: huge amount of data, also for various construction periods and different building typologies
Service part: small amount of data, especially for different construction periods and different building typologies
Ownership structure
Small amount of data for all sectors, problem of correspondent data
Energy demand
Space heating: huge amount of data, also for different building typologies
DHW preparation: medium amount of data, especially for the office sector
Space cooling: real lack of data, especially for the residential sector

20. THANK YOU FOR YOUR ATTENTION!