oThe European Alliance of Companies for Energy Efficiency in Buildings
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Overview

Assessing the Situation
• Current potential *
• Wider benefits

Finding a Way Forward
• Opportunities and barriers
• Case studies
• Recommendations

Downloads

Index of links

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High-Rise project >> Assessing the Situation > Current potential >

Refurbishment measures Results      
• For each base building Overall            

Moderate climate EU10 countries (base building E)

Headline facts and figures

• Broadly representative of the Czech Republic, Hungary, Slovakia and Slovenia
• 3 million dwellings
• 50,000 buildings (theoretical)
• 27% of dwellings in the region
• Energy-saving potential in stock: 39%, equivalent to 2.5% of region’s final energy demand or 4 MtCO2 emissions

Predominant construction and heating features

• Prefabricated concrete panel walls, flat concrete roof and concrete floor, double-glazed, wood frame windows
• District heating, allowing installation of TRVs and balancing valves

Cost effectiveness of energy efficiency investment

Energy savings, investment costs and cost of conserved energy

 

U-value before

U-value after

Energy saved [kWh/m2a]

Annual investment cost [€/m2a]

Cost of conserved energy [€cent/kWh]

Simple payback [a]

Walls

1.20

0.30

60.1

33.1%

0.92

1.5

8.7

Roof

2.17

0.24

21.7

12.0%

0.15

0.7

3.8

Floor

1.10

0.45

7.3

4.0%

0.13

1.7

9.9

Windows

2.90

1.70

26.7

14.7%

0.71

2.7

15.2

Package

1.63

0.59

115.8

63.8%

1.91

1.6

9.3

TRVs

54.5

30.0%

0.19

0.3

1.6

All of the above combined

135.5

74.7%

2.10

1.5

8.6

Energy savings, costs of energy and of CO2 mitigation

 

Energy saved [kWh/m2a]

Cost of supplied energy [€cent/kWh]

Cost of conserved energy [€cent/kWh]

Net cost of conserved energy [€cent/kWh]

Cost of CO2 mitigation [€/tCO2]

Net cost of CO2 mitigation [€/tCO2]

Walls

60.1

33.1%

3.0

1.5

-1.5

67

-66

Roof

21.7

12.0%

0.7

-2.4

29

-104

Floor

7.3

4.0%

1.7

-1.3

76

-57

Windows

26.7

14.7%

2.7

-0.4

117

-16

Package

115.8

63.8%

3.0

1.6

-1.4

72

-61

TRVs

54.5

30.0%

0.3

-2.7

15

-118

All above

135.5

74.7%

1.5

-1.5

68

-66

Issues

• Energy saving potential is the highest amongst the regions.
 

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