The Toolbox

The X-tendo toolbox enables you, as a public authority or implementing agency, to improve the current Energy Performance Certificate (EPC) scheme of your country, evolving towards the next-generation.

The elements of the X-tendo toolbox include for each of the features, the following components:

  • Problem and solution, an approach based on good practice examples from existing experiences and derived guidelines on how to replicate them.
  • Methodological approaches for next-generation EPC features.
  • Calculation procedures, supporting transparency, understanding and implementation of new EPC features.
  • Implementation guidelines and recommendations on how to embed the innovative features in existing EPC framework.

The X-tendo partners will make sure the features and their development meet the following four key cross-cutting criteria:

  • Good quality and reliability of EPCs: How to ensure a reliable implementation and calculation in practice?
  • User-friendliness: How to meet end user needs and expectations? How to ensure a smooth transition from static and paper-based documents to digital dynamic information?
  • Economic feasibility: How to ensure that all features are economically feasible?
  • Consistency with ISO/CEN standards: Which main standards are relevant for the different features? How to enhance consistence with ISO/CEN standards?

Toolbox

Innovative
energy performance
certificate indicator

Smart Readiness

Innovative EPC Indicator

Innovative EPC Indicator

Smart Readiness

Smart technologies in buildings have the potential to contribute to increasing the energy efficiency of the building stock, to enhance the flexibility in smart energy grids, and to improve the comfort of building occupants. In order to increase the visibility and uptake of smart technologies in the European building stock, the introduction of a Smart Readiness Indicator (SRI) for buildings is included as optional in the current recast of the Energy Performance of Buildings Directive (EPBD). This indicator would allow to assess the level of smartness of a given building in a reliable and meaningful way for building owners, tenants and users.

A technical study, led by VITO and concluded in August 2018 investigates the scope, definition and calculation of the SRI, and performs a more detailed assessment of its potential impacts. X-tendo will evaluate potential pathways to integrate the SRI assessment as an integrated part of the EPC.

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Innovative
handling energy
performance
certificate data

EPC Databases

Innovative Handling EPC Data

Innovative Handling EPC Data

EPC Databases

The value of EPC databases as a tool for quality assurance, and data mining to allow retrofit programme has been demonstrated in best practice in a number of countries. X-tendo will specify how countries at different stages of the development of EPC database systems can take steps towards best practice in these areas.

X-tendo will carry out a methodology development and testing activities with EPC databases or official test versions. X-tendo will develop components for quality assurance and compliance and identify possible links to other databases like building registry, policy support databases or databases from research institutions.

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District Energy

Innovative EPC Indicator

Innovative EPC Indicator

District Energy

X-tendo will develop the capacity of EPCs to assess and report on the potential for the building to benefit from – or contribute to - future developments of district heating networks. This concerns the future decarbonisation of heat generation of district heating systems, as well as the required transformation of district heating towards 4th generation (smart, lower temperature) systems.

X-tendo will elaborate and test in buildings a methodology to see the potential for EPCs to integrate primary energy and CO2-emission factors that allows an assessment of the potential for the building to optimise indoor installations to be suitable for the 4th generation district heating.

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Outdoor Air Pollution

Innovative EPC Indicator

Innovative EPC Indicator

Outdoor Air Pollution

According to the World Health Organisation, approximately 1 in 8 deaths in 2012 were attributed to air pollution, making this a crucial factor of health. An important contributor to air pollution comes from the building sector, involving highly polluting fuels and technologies used to cover heating and/or cooking needs.

X-tendo will elaborate and test a methodology for reporting on the buildings‘ contribution to air pollution. In this methodology, air pollutant emission factors will be assigned for different fuels and building technologies and, based on the resulting final energy demand, the emissions will be calculated.

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Tailored Recommendations

Innovative Handling EPC Data

Innovative Handling EPC Data

Tailored Recommendations

Cost and time constraints often result in EPCs containing poorly tailored recommendations. Cost-effective approaches to deliver tailored renovation recommendations, in particular in the form of individual building renovation roadmaps, can help to overcome this barrier.

X-tendo will propose and adapt existing approaches with the goal of developing a workflow to automatically provide enhanced recommendations based on input data required for EPCs.

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Building Logbook

Innovative Handling EPC Data

Innovative Handling EPC Data

Building Logbook

Logbooks have been recognised – and developed in some countries - as a way to engage building owners and maximise the value of EPC data for them.

X-tendo will identify how EPC registers and systems at different stages of development can support the development of logbooks. For the test projects, X-tendo will examine how the EPC data could be linked to the building logbooks.

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Real Energy Consumption

Innovative EPC Indicator

Innovative EPC Indicator

Real Energy Consumption

The gap between real energy performance and EPC modelled performance is usually a source of confusion to EPC users. It is thus important, in order to tackle this barrier, to investigate about if and to which extent actual consumption data can be included and identify how to communicate this information to building owners and other end-users.

X-tendo methodologies to integrate and diagnose (e.g. to adjust for real weather or occupant conditions) real energy consumption data will be based on ongoing studies. The aim is not to close the gap between real and predicted consumption, but to explain the difference to increase trust in the EPC.

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Comfort

Innovative EPC Indicator

Innovative EPC Indicator

Comfort

Adequate levels of indoor air quality (IAQ), thermal comfort, lighting and acoustics in buildings are among the most important benefits and drivers especially for renovation, as they lead to improved health and comfort of the occupants. However, they are not currently covered by EPCs: this indicator will allow to assess the levels of comfort in terms of Indoor Environmental Quality for a given building through reliable and evidence-based inputs.

X-tendo will develop a three-section assessment approach, that will be tested in buildings, and will consist of a simplified checklist of installed systems and materials, indoor measurements of temperature, relative humidity and CO2-concentrations and a survey of occupants’ perception on aspects such as thermal comfort and indoor air quality.

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One Stop Shops

Innovative Handling EPC Data

Innovative Handling EPC Data

One Stop Shops

One-stop-shops are seen as key means to reduce barriers and transaction costs for finding information regarding support schemes, craftsmen, public authorities. Obviously, these functionalities of one-stop-shops could and should also be linked to EPCs.

X-tendo will document and describe approaches to link EPC data to one-stop-shops.

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Financing Options

Innovative Handling EPC Data

Innovative Handling EPC Data

Financing Options

The provision of sources of information on financial support alongside with the EPC recommendations can help persuade building users to undertake a renovation. Financing options will mainly focus on public support schemes like soft loans, subsidy schemes or also incentives provided by energy retailers in the frame of the energy saving obligations (Art 7 of the EED).

X-tendo will describe possible approaches and mechanisms to link data on available financing with EPC systems and how to communicate this to building owners.

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