1 John Woollett. 2 Where I’m going to take you during 15 mins EPBD’s effect on Sweden’s building regulations. Real life; Västerport Stockholm Low energy.

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Presentation transcript:

1 John Woollett

2 Where I’m going to take you during 15 mins EPBD’s effect on Sweden’s building regulations. Real life; Västerport Stockholm Low energy (Passive) house Trends at Swegon now & the future Complaints That’s it!

3 New Swedish Building Regulations Tougher and more precise than before Zones (electrical) other fuel I 95KWh/m 2 a140KWh/m 2 a II 75KWh/m 2 a120KWh/m 2 a III 55KWh/m 2 a100KWh/m 2 a Complete by end of 2009

4 Primary fuels to buildings

5 ”the Swedish Way”

6 Västerport, completed 2008 Requirement Green Building 0,75*170=127,5 kWh/m 2 a Calculation of energy usage: 89 kWh/m 2 a Well insulated and tight climate shell. Moderate window areas, good sunshades. Heating storage in heavy building frame. Robust climate system. Rotating heat exchanger, 80-85%. Free-cooling with fresh air. Demand Controlled Ventilation (DCV). Energy effective fans, low duct pressure. Avoiding of simultaneous heating and cooling. Heat energy; district heating

7 Low energy; the standard for the future

8 Development Trends at Swegon Focus on IEQ and energy…as always LCC more in focus, but still a long way to go. Good economic database (relisticly priced to motivate the right choice i.a. insulation, DCV systems). Continual small improvements in components: Better SFP, optimising unit sizes, lowering ΔP, full face, intelligent control systems. Whole solution within the building…the building as a system

9 Complaints Natural ventilation, but at the expense of IEQ? 2 well-known buildings in London; Yes it’s naturally ventilated, but the natural ventilation criteria met for only a few hours each year, otherwise uses the 100+ ahu. ”pockets of stale air…temperature too high and can’t do anything about it.” Energy experts; can one be an energy expert after a 2 day course`, fit to past judgement on how a building performs from an energy perspective?....must think building system.(system choice)

10 To conclude… EPBD is helping to get people to focus on long term energy efficiency. Increased joined up thinking from the beginning, all aspect given proper consideration. Need more open research into how different newly built building really perform. (Not how they are perceived to perform). Low Energy (Passive) house concepts will become the norm. IEQ rating together with energy rating