This document discusses Henning Larsen Architects' approach to designing existing building stocks for sustainability. It notes that over half a million square meters designed in the past year achieved an energy consumption of 40 kWh/m2/yr, a 15 million kWh reduction. Case studies are presented showing light, medium, and heavy renovation strategies that achieve energy savings through geometry, location, daylighting, and replacement of existing windows. Research aims to quantify relationships between money invested per square meter and potential energy savings. The goal is to develop cities through renovations that increase building value and quality of life.

1. 31. 1. 2013
Design with knowledge:
The existing building stock
Signe Kongebro
Architect MAA, Associate Partner,
Head of Sustainability Department
Henning Larsen Architects
Contact: sik@henninglarsen.com

3. • Henning Larsen Architects’ buildings in 7 slides
• Starting point
• Existing building stock – Planning strategy and m²
• Existing building stock – Daylight
3

4. Henning Larsen
founded the company in 1959
Henning Larsen Architects
employs 200 people
from 20 different nations
65% of turnover derives from
international projects
Projects in more than 20 countries
Offices in Copenhagen, Oslo, Munich,
Riyadh and Istanbul

5. Built / Spiegel HQ / Hamburg
5

6. Built / Harpa – Reykjavik Concert Hall and Conference Centre, Iceland
6

7. Built / IT University / Copenhagen, Denmark

8. Under construction / Calabar Int. Convention Center / Nigeria

9. Design ongoing / New Herlev Hospital / Denmark
9

10. Under construction / Batumi Aquarium / Georgia

11. Starting point
“Sustainability is an opportunity
for all architects to bring more
meaning and value into our lives
and society”

12. Method and tools: Reduce – Optimize - Produce
“During the past year, Henning Larsen
Architects has designed more than half a
million m² with an energy consumption
of 40 kWh/m2/y
– a reduction of 15 million kWh (BR10)”

13. Projects by Henning Larsen Architects – low-energy
Campus Roskilde, Denmark Nordea HQ, Denmark
44 kWh/m²/year 18 kWh/m²/år
Moesgaard Museum, Denmark University of Southern Denmark
43 kWh/m²/year 42 kWh/m²/year

14. Siemens HQ, Munich Viborg Town Hall, Denmark
46 kWh/m²/year 44 kWh/m²/year
Spiegel HQ, Hamburg King Abdullah Financial District,
80 kWh/m²/year Saudi Arabia
HafenCity Gold Medal Under construction: World’s
largest LEED certified city district
14

15. Tools co-developed by Henning Larsen Architects

16. Existing building stock
European trends
- No money – but investments are needed
- More for less – added value
- How do we compare? Measurability and performance
- Complexity increases - the tenders get to detailed
- How should we work? Data + knowledge = better buildings
- Why are we slow? Toolbox is full of techqnologies – but everybody asks for add
value

17. Existing building stock
– Planning strategy and m²
”Complete renovation increases the total building value.”

18. Existing building stock
Our approach
- Research and development
- Partnerships
- Spatial and technical strategies
- Always looking for winwinwinwinwin…….
18

19. Software – special calculator for money and energy

22. Case: A desk top analysis on a port folio

23. Different analysis:
Energy savings in % in
relation to money
invested/m2
Buildings marked in red has
the largest potential

24. There are strategies
Light Medium Heavy

25. Case: LIGHT
www.energimål.dk - Building is technically optimised

26. Case: MEDIUM
Existing tower is expanded with 1,900 low energy m². (minus 25% in kWh/m2/y)

27. Case: HEAVY
New low energy twin tower + 6,000 m². (minus 40% in kWh/m2/y)

28. Test af strategy on city level
”Do we want to develop our cities?”
28

29. Case: LIGHT
Implemented at city scale

30. Case: HEAVY
Implemented at city scale

31. Existing building stock
– Daylight used as design measure

32. Knowledge: Energy-efficient design
Geometry and location
are important aspects of
low-energy building

33. Knowledge: Energy-efficient design
33

34. Knowledge: Energy-efficient design
34

35. Knowledge: Energy-efficient design
35

36. Case: Daylight renovation, Denmark 2011-12

37. Research – PhD

38. Case: Daylight renovation, Denmark 2011-12
Replacing existing
windows with French
windows (two layers)
25 % less energy
30 % more daylight
38

39. Case: Daylight renovation, Denmark 2011-12
+ 10-15 % more sun on the facades
+ 15-20 % more sun at ground level
+ 20 % more m²
+ More quality in outdoor spaces and green spots
Before
After
39

40. New books
www.saxo.dk

41. Thanks
www.henninglarsen.com
41