1. 24 September 2007Remodece Coimbra1 Remodece Swiss Survey Results of Household Electricity Conrad U. Brunner S.A.F.E. Swiss Agency for Efficient Energy Use Zurich/Switzerland www.energy-efficiency.ch www.energybox.ch

2. 24 September 2007Remodece Coimbra2 Total Electric Consumption ? General uses outside apartment: auxiliary heating, lighting for stairs, corridors, outdoors yes/no: electric hot water 3‘600 kWh/a yes/no: electric heating 7‘500 kWh/a yes/no: electric cooking 350 kWh/a What few people have: Aquarium, sauna What almost everybody has: 3‘300 kWh/a Lighting, refrigerator/freezer, washing/drying, cooking/baking/dish washing, telephone, TV, audio, settop box, home office, games, AC/DC trafo charger stand by, etc. general use 12 % 36 % 90%

3. 24 September 2007Remodece Coimbra3 Surveys Switzerland Electricity Utilities 2005: telephone interview –clients in different areasmeasured consumption –complete test30 questions Energybox 2003 – 2007: web questionnaire 1.Quicktest10 questions 2.Complete Test 39 questions 3.Specific Topic Test10 areas

4. 24 September 2007Remodece Coimbra4 Comparison: Germany - Switzerland

5. 24 September 2007Remodece Coimbra5 Quick Test

6. 24 September 2007Remodece Coimbra6

7. 24 September 2007Remodece Coimbra7 Persons by age

8. 24 September 2007Remodece Coimbra8 Total consumption by size of apartment

9. 24 September 2007Remodece Coimbra9 Single family – multiple occupancy building

10. 24 September 2007Remodece Coimbra10 Electric heating and warm water

11. 24 September 2007Remodece Coimbra11 Refrigerator and freezer

12. 24 September 2007Remodece Coimbra12 Refrigerator age

13. 24 September 2007Remodece Coimbra13 Refrigerator volume

14. 24 September 2007Remodece Coimbra14 Washing machine: age

15. 24 September 2007Remodece Coimbra15 Use of tumble dryer

16. 24 September 2007Remodece Coimbra16 Dish washer

17. 24 September 2007Remodece Coimbra17 Age of dish washer

18. 24 September 2007Remodece Coimbra18 Cooking habits

19. 24 September 2007Remodece Coimbra19 Office equipment

20. 24 September 2007Remodece Coimbra20 Home entertainment

21. 24 September 2007Remodece Coimbra21 TV Standby

22. 24 September 2007Remodece Coimbra22 Lighting: number of lamps

23. 24 September 2007Remodece Coimbra23 Lighting electricity

24. 24 September 2007Remodece Coimbra24 Weekly use

25. 24 September 2007Remodece Coimbra25 All applications

26. 24 September 2007Remodece Coimbra26 Savings potential

27. 24 September 2007Remodece Coimbra27

28. 24 September 2007Remodece Coimbra28 b

29. 24 September 2007Remodece Coimbra29 Lessons learned Sample quality Heat processes are crucial Elt. heating systems: how and how long? Elt. hot water: how and how much? Warm meals: devices and habits Wrong answers Plausibility check (upper/lower limits) Median not average Air conditioning: none in the sample Home office is worse than real office Older equipment, multi-people use, games, stand-by Clothes dryer Large savings potential with heat pump Lighting has big savings potential

30. 24 September 2007Remodece Coimbra30 Total consumption: Measured vs. surveyed Energybox „measured“3‘976 kWh/a100,0 % Energybox „calculated“4‘113 kWh/a103,6 % VSE „measured“3‘797 kWh/a 95,5 %

31. 24 September 2007Remodece Coimbra31 Total consumption: Germany vs. Switzerland Total electricity consumption: pretty close –Switzerland (measured)3‘976 kWh/a100,0 % –Germany3‘474 kWh/a 87,4 % Germany: ~ population a little older –less one family houses –less electric space heating –less electric hot water –less refrigerators with freezer compartment –less home offices and TV + more incandescent lamps