Buildings: Ca 40 % of energy support. Ca 50 % of CO2 emissions

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1 Buildings: Ca 40 % of energy support Ca 50 % of CO2 emissions

2 Passive houses: The fresh support air may be heated. You can withdraw radiators or floor heating 10 W per squaremeter for heating / cooling power Energy: ca 15 kwh per squaremeter / year

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4 In a low energy house the user habits has a large influence The figure shows the evaluation of the energy use in 20 passive houses Lindås A1 A2 A3 A4 A5 A6 B7 B8 B9 B10 B11 B12 C13 C14 C15 C16 D17 D18 D19 D20 Conventional house kwh/year

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7 o n Anna-Karina Karlsson with her sons Emil and Alexander all help each other to heat their house. The cat Garfield also performs as an extra heat- source. K a r l s s

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9 Swedens first nursery school with Passive House technology: Stadsskogen i Alingsås

10 In 2050, 85 % of the buildings exist today

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12 Brogården Alingsåshem 300 apartments in 16 houses Built ca 1970 Renovated > 50 years lifetime

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15 The Good Life Less loneliness Security, accessibility Multiculture Squares, meeting points More Free Time

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20 Brogården, Alingsåshem before renovation Brogården, Alingsåshem before renovation isolation in the attic U-value ca 0,20 W/m2, K Central ventilation without heat exchanger 10 cm isolation in walls U = 0,4 W/m2, K 3-pane windows U= 2,8 Entrance doors U = 2,5 Concrete balcony floo with thermal bridges to floor inside Air tightness 4ach at 50 Pa No groundfloor isolation Energy performance: (kwh/m2, year) 22degrees indoor temperature Space heating: 115 Domestic hot water : 42 Household electricity : 39 Common electricity : 20 Summary: 216

21 Brogården, Alingsåshem after renovation 5 cm isolation on the existing roof 38 cm isolation in the attic U-value ca 0,20 W/m2, K Decentral ventilation with heat exchanger Efficiency > 85 % 35 cm isolation in walls U = 0,12 W/m2, K New exterior balconies without thermal bridges 3-pane windows U= 0,85 Air tightness 0,4ach at 50 Pa Entrance doors (porch) U = 0,8 11 cm isolation, U = 0,14 Energy performance: (kwh/m2, year) 22 degrees indoor temp After (Before) Space heating: 19 (115) Domestic hot water: 18 (42) Houshold electricity: 28 (39) Common electricity: 21 (20) Summary: 86 (216) Space heating: Before: 115 kwh/sqm After: 19 kwh/sqm

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24 Costs per apartment Total renovation SEK ~ including extra costs for energysaving ~ Pay back time for energysaving < 10 years (Demolishing and rebuilding > )

25 Energy use after renovation of multy family houses from in Sweden Brogården, Alingsås per unit Sweden appartments Today After Savings Today After Savings kwh renov. kwh TWh renov. TWh Heating ,8 1,1-5,7 DHW ,5 1,1-1,4 Common electricity ,2 1,3 +0,1 Sum ,5 3,5-6,6 Household electricity ,3 1,7-0,4 Total sum ,8 5,2-7,6 (7 TWh is the energy used by more than new built Swedish standard one family houses.)

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27 The greatest problem with experiences Hello, wait! No, thank s..have no time Madness is a way of doing the same when you expect another result 27

28 Level of influence Common goal Partnering contracting Total contracting General contracting Parted contracting Time for Project 28

29 Common goal in the projecting 29

30 Visual projecting How many? 30

31 Visual projecting 31

32 Practice 32

33 Important that every actor ownes the aim TOGETHER WE HAVE THE KNOWLEDGE AND WHEN EVERYBODY OWNES THE AIM WE ACHIEVE THE GOALS. 33

34 OUR COMMON GOALS IN THE PLACE OF WORK Brogården Etap 1 1. Working climate We will have a good working climate in the building. We achieve it through communication, information and respect each others persons and craftmanship. 2. Clean building We will have a clean building, with good dustfree indoor climate where it is easy to get rid of and assort restproducts into right fractions both in the building and the building office. 3. Working environment We will have a good structure in the premises with handling materials, storages, tool containers and security against stealing. 4. Planning We will have a good planning in the working place. We achieve this with good support of materials, deliverances just in time, correct plansupport and in right time. 34

35 DocumentedtExperiences sar på LEED Gold 35

36 Experiences 36

37 Thermografing - before in Brogården Bild: SP 37

38 Thermografing - after in Brogården Bild: Skanska 38

39 Good examples 39

40 Pilotproject 40

41 The greatest problem with experiences Madness is a way of doing the same when you expect another result 41

42 The EU directive for 2020: NEAR ZERO ENERGY BUILDINGS (Refurbishment 2021) = Passive House criterias + renewable energy support

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44 Lindås Test Unit Average Passive Common house Heating Hot water Electricity TOTAL

45 LINDÅS Energianvändning kwh per lägenhet, år Measured Test unit 5800 Estimated 5400 Serie3 Serie2 Serie

46 FRAM, Fritjof Nansens ship 1883

47 FRAM, Fritjof Nansens ship 2010

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55 Brf Ängared, Client and architect: Glantz Arkitektstudio Contractor: Rydlers Bygg

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58 Office Building in Ulm, Germany Architekt: OEHLER FAIGLE ARCHCOM

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61 Project coordination Martin Jorlöv Project Coordinator Skanska Sverige AB 61

62 Comment from a customer I came here to watch an energyhouse. I go with a knowledge how you build a part in a functional society in a new way. A symbolic comment from a visitor in Brogården 62

63 The EU directive for 2020: NEAR ZERO ENERGY BUILDINGS