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The definition framework should use multi-level approach to address different applications/users.

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Besides boundaries, the time dimension should be carefully considered in the calculation.

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Buildings, mobility and district heating system might have different boundaries.

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District heating should be included in the energy balance calculation.

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- We should be careful that PEDs do not lead to positive energy islands, which are not beneficial to the surrounding areas/region.
- Cooperation with surrounding areas/regions is important to avoid sub-optimisation.

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PEDs should be built from renewable energy to achieve a positive energy balance and zero GHG emissions.

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Positive Energy Balance vs Zero Emissions

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Positive Energy Balance vs Zero Emissions

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The positive energy balance is not the most important, zero GHG emission is more important.

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The definitions should provide added values to the work and not just a label.

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- There is a need to balance between the two ends.
- If the definition is too broad and flexible, it would be difficult to distinguish PEDs against other concepts.

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There is not a clear PED definition, it is very confusing.

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Aspect 1 - A Universal and Inclusive Framework

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Aspect 1 - A Universal and Inclusive Framework

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Needs, Challenges and Suggestions

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The PED definitions will be applied to districts and cities with considerably different boundary conditions.

i) Due to the inherited local characteristics and potential of local resources, it would be easier for some to achieve PEDs while harder for others. How should we handle these differences in the framework? How should we account for the local diversity in the framework in order to provide a level playing field for different districts/cities.

ii) For the energy balance calculations, are there elements/parameters that should be treated differently based on the location/situation of the districts/cities? If yes, what are the foreseeable challenges and suggestions for overcome them?

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Elements need to be addressed, Challenges and Suggestions

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Help us to develop a universal framework that can be used in different districts, cities, countries and world regions.