Publications of Stéphane Monfils
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See detailStudy of the Uncertainties Influencing the Energy Performance Assessments of Two Very Different Urban Houses in Wallonia
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

Scientific conference (2019, September 25)

Implemented by the European EPB directives, the Energy Performance Certification has been designed by authorities to “provide clear information about the energy performance of a building”. Studies led in ... [more ▼]

Implemented by the European EPB directives, the Energy Performance Certification has been designed by authorities to “provide clear information about the energy performance of a building”. Studies led in Wallonia show however that official results are often too distant from reality and difficult to understand for the lay person. This paper focuses on the comparison between two certified old urban brick single-family houses in the Walloon residential stock: a highly efficiently renovated “exemplary building”, described in detail, versus an inefficient and poorly described second house. After presentation of the case studies, this paper will investigate the uncertainties that surround the description of the “energy systems” and the standardized calculation method. This research explores the possibilities of elevating the confidence in the certification results by adding information on the description of the envelope and systems, by re-integrating the human factor in the equations (through a questionnaire collecting by interview the dwellers’ energy-related behaviours and practices), and by using dynamic simulations. The comparison of the results to the official standardised results indicates that additional data on the household’s composition, practices and energy-related behaviours are as much needed as a more accurate description of the energy system, which is penalized by default values and a severe standardisation of the calculation method. [less ▲]

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See detailFeuille de route pour une rénovation durable, ambitieuse et efficace des copropriétés
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

Report (2019)

L’objectif de ce document est d’aider au développement d’un guide de rénovation pasà-pas pour l’amélioration des copropriétés du point de vue de la sécurité, de la salubrité, des performances énergétiques ... [more ▼]

L’objectif de ce document est d’aider au développement d’un guide de rénovation pasà-pas pour l’amélioration des copropriétés du point de vue de la sécurité, de la salubrité, des performances énergétiques et de la vulnérabilité au changement climatique. Cette feuille de route, cohérente et progressive, permettra d’y créer un environnement de vie plus sain et plus confortable. Les avantages attendus d’une telle feuille de route sont multiples, parmi lesquels on peut citer le maintien ou l’augmentation de la valeur foncière du bien, la résistance aux épreuves du temps, le confort des habitants (hygrothermique, acoustique, olfactif, sanitaire, technologique, économique ou financier), la réduction de l’impact de l’habitat sur le climat et l’environnement, l’indépendance énergétique à tout niveau… [less ▲]

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See detailThe human factor in the energy performance assessments for renovation strategies of existing urban houses in Wallonia
Monfils, Stéphane ULiege

Doctoral thesis (2018)

In order to reach energy efficiency at any level, the importance of the human factor has to be acknowledged. On one hand, efficient solutions (regarding, for example, building energy consumptions) have to ... [more ▼]

In order to reach energy efficiency at any level, the importance of the human factor has to be acknowledged. On one hand, efficient solutions (regarding, for example, building energy consumptions) have to be implemented by an authority who understands the complexity of the urban context and its impacts on the environment; on the other hand, it is important to improve citizens’ awareness of their environmental impact and to lead them to use available solutions to their full potential. In the field of residential use of energy, people are therefore a crucial parameter of both the problem and its solution. The EPC has been designed by authorities to “provide clear information about the energy performance of a building”, in order to influence the real-estate market, promote energy performance improvements and help build up comprehensive benchmarking databases, fundamental for shaping strategies on a local or regional level. The EPC, however, offers in return of a 200€ visit, results that are often too distant from reality and difficult to understand for the lay person. “Consumers do not understand CO2 or kWh”. They do not understand “primary energy” either, given that their only knowledge of their energy consumption are the final energy bills. The procedure might be necessary, but the general picture shows a great opportunity remaining underexploited, a potential driver to reducing energy consumption and CO2 emissions, surrounded by barriers and obstacles that render its use all the more difficult. While appreciating the necessity of presenting a “legal” result as a comparison base, following the approved standardized calculation method, it is believed that the input data used in the quasi-steady state calculation method could be used to display complementary results. Additional data on the household’s composition, their practices and behaviours related to energy consumption, as well as a more accurate search in the description of the energy system, could help close the gap between real and theoretical consumptions, allowing future owners to better understand and appropriate the EPC results, foresee a rough monthly energy bill, and make better decisions for their real-estate renovation ambitions. This PhD-thesis therefore first sets the context of residential energy use in Wallonia, before questioning the uncertainty parameters of the certification procedure. A questionnaire, built for this research, allowed the interview of 16 case studies, and the collection of their energy-related behaviours and practices. Based on the existing inputs, protocol and global philosophy of the EPC procedure, a modification of the calculation method is suggested in order to integrate the answers to the questionnaire. The results of the many simulations, and those of the sensitivity analysis on the modifications, are presented in the second part of this thesis, followed by conclusions and perspectives for the future. [less ▲]

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See detailBâtiment & énergie
Hauglustaine, Jean-Marie ULiege; Simon, Francy; Monfils, Stéphane ULiege et al

Book published by SPW Energie - 1ère ed. (2018)

Le présent guide pratique pour architectes "Bâtiment & énergie" poursuit l'objectif de mettre, à la disposition des concepteurs de bâtiments, les outils qualitatifs et quantitatifs leur permettant de ... [more ▼]

Le présent guide pratique pour architectes "Bâtiment & énergie" poursuit l'objectif de mettre, à la disposition des concepteurs de bâtiments, les outils qualitatifs et quantitatifs leur permettant de prendre les aspects énergétiques en compte, le plus tôt possible dans la phase de conception de la construction d'un nouveau bâtiment, ou de la rénovation d'un bâtiment existant. Il rassemble en un seul ouvrage la collection des précédents guides pratiques pour architectes, que les auteurs avaient rédigé entre 1996 et 2003, et qu'ils ont mis à jour, notamment en ce qui concerne l'évolution des connaissances scientifiques, des normes s'appliquant aux bâtiments, et du contexte réglementaire de la Performance Energétique des Bâtiments. [less ▲]

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See detailIntroduction of Behavioral Parameterization in the EPC Calculation Method and Assessment of Five Typical Urban Houses in Wallonia, Belgium
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

in Sustainability (2016)

This article exposes the modification brought to the EPC calculation method in order to integrate behavior influence. It exposes the results of the simulations on 5 Walloon urban houses.

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See detailQualitative validation of an energy consumption behaviour-related survey for certified typical Walloon urban houses
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

Scientific conference (2016, September 09)

This article exposes the methodology used for reducing the gap between theoretical and real final energy consumptions in Walloon EPB-certified existing houses, and analyses the results.

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See detailIntroduction of sociology-inspired parameters in the energy performance certification calculation method
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

Scientific conference (2016, March)

EPCs in their actual form, calculated with a standardized approach which purposefully (and understandably), gets human factor out of the equations, do not allow appropriation of the results by potential ... [more ▼]

EPCs in their actual form, calculated with a standardized approach which purposefully (and understandably), gets human factor out of the equations, do not allow appropriation of the results by potential buyers or tenants. Often distant from reality, overestimating consumption, they usually result in a general misunderstanding and misuse of the document. This study aims at verifying that the actual calculation method used in certification could approach the objectives it has been designed for, by using additional data on occupants’ behaviour and household characteristics. [less ▲]

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See detailSupply chain case study: Development of an industrialised system for quick and easy replacement of urban modest houses facades
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

in Roset Calzada, Jaume; Kaltenegger, Ingrid; Patterson, Jo (Eds.) et al COST Action TU1104 - Smart Energy Regions - Skills, knowledge, training and supply chains (2016)

The Reno2020 project engaged all construction actors, from stock owners to local material producers, to imagine efficient refurbishment solutions of dwellings in the suburbs of Liege (BE), according to ... [more ▼]

The Reno2020 project engaged all construction actors, from stock owners to local material producers, to imagine efficient refurbishment solutions of dwellings in the suburbs of Liege (BE), according to their typology. This industrialised solution has been developed to replace the street façades of old, often insalubrious urban modest “blue-collar” houses. Among its strengths: set-up rapidity, high energy performance without loss of private or public space, locally-sourced materials and urban-scale retrofit potential. [less ▲]

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See detailSmart Energy Regions - Skills, training and knowledge case study: REGAIN
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

in Roset Calzada, Jaume; Kaltenegger, Ingrid; Patterson, Jo (Eds.) et al COST Action TU1104 - Smart Energy Regions - Skills, knowledge, training and supply chains (2016)

“REGAIN” is the acronym for "Reducing the Greenhouse Effect Through Alternative Industrial Estate Management in North-West Europe", an INTERREG IV research project designed to develop a transnational ... [more ▼]

“REGAIN” is the acronym for "Reducing the Greenhouse Effect Through Alternative Industrial Estate Management in North-West Europe", an INTERREG IV research project designed to develop a transnational method for the conception of semi-industrial buildings integrating industrial process (or craft industry) and offices, with very low energy consumption and very high environmental quality. [less ▲]

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See detailSmart Energy Regions - Skills, training and knowledge case study: Cap2020
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

in Roset Calzada, Jaume; Kaltenegger, Ingrid; Patterson, Jo (Eds.) et al COST Action TU1104 - Smart Energy Regions - Skills, knowledge, training and supply chains (2016)

CAP2020 is a regional cluster created under the impulsion of Wallonia. It gathers a group of enterprises active in the building industry, who adopt and pursue the 2020 European objective of massive energy ... [more ▼]

CAP2020 is a regional cluster created under the impulsion of Wallonia. It gathers a group of enterprises active in the building industry, who adopt and pursue the 2020 European objective of massive energy consumption reduction applied to buildings and build a common attitude related to sustainability stakes. [less ▲]

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See detailInfluence of incentives, occupancy and energy-related behaviours on renovation strategies decision making
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

Scientific conference (2016, February)

Previous studies have shown that implementing real occupancy and energy-related behaviour parameters in the regulatory calculation method can help close the gap between theoretical and real energy ... [more ▼]

Previous studies have shown that implementing real occupancy and energy-related behaviour parameters in the regulatory calculation method can help close the gap between theoretical and real energy consumption. This study takes one more step by integrating financial incentives and occupants strategic planning in the energy and economic performance assessment of progressive renovation scenarios, focusing on two urban single-family houses, chosen for their representation of the Belgian urban residential stock. [less ▲]

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See detailIntroduction of the human factor in the EPC/EAP assessment in Wallonia
Monfils, Stéphane ULiege

Conference (2015, October 30)

One of the existing tools that could help creating smart energy policies is the Energy Performance Certification (EPC) of residential buildings, by introducing energy efficiency as a comparative criterion ... [more ▼]

One of the existing tools that could help creating smart energy policies is the Energy Performance Certification (EPC) of residential buildings, by introducing energy efficiency as a comparative criterion for real-estate purchase choices, influencing real-estate market value, stimulating energy saving investments, moving the housing market towards greater energy efficiency and creating comprehensive databases which are fundamental for shaping smart strategies on urban / regional / national levels. But EPCs in their actual form, calculated with a standardized approach which purposefully (and understandably) gets human factor out of the equations, do not allow appropriation of the results by potential buyers or tenants: often distant from reality, overestimating consumption, they usually result in a general misunderstanding and misuse of the document. This thesis therefore focuses on the integration of the human factor in the Walloon energy performance calculation methods, to develop complementary “custom-made” certification, advice, recommendations and help in renovation strategies decisions. [less ▲]

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See detailEnquête et définition de profils comportementaux de la consommation d’énergie des ménages dans les maisons urbaines wallonnes
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

Scientific conference (2015, July 02)

This paper presented the setting-up of a questionnaire, intended for a vast regional survey, developed to collect data on behaviour, habits and occupation schemes related to energy consumption in Walloon ... [more ▼]

This paper presented the setting-up of a questionnaire, intended for a vast regional survey, developed to collect data on behaviour, habits and occupation schemes related to energy consumption in Walloon urban houses [less ▲]

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See detailThe Energy Performance Certification: A tool for smarter cities?
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

Scientific conference (2014, December)

One of the existing tools that could help creating smart cities is the Energy Performance Certification (EPC) of residential buildings, by introducing energy efficiency as a comparative criterion for real ... [more ▼]

One of the existing tools that could help creating smart cities is the Energy Performance Certification (EPC) of residential buildings, by introducing energy efficiency as a comparative criterion for real-estate purchase choices, influencing real-estate market value, stimulating energy saving investments, moving the housing market towards greater energy efficiency and creating comprehensive databases which are fundamental for shaping smart strategies on urban, regional and national levels. The impact on potential buyers or tenants is crucial in order to reach these goals but EPC’s results, in their actual form, do not help raise people awareness: often distant from reality, overestimating consumption, they usually result is a general misunderstanding and misuse of the document. This study aims at verifying that the actual calculation method used in certification could approach real building consumption, by using additional data on occupant behaviour and household characteristics. It first presents the concepts behind smart cities, then an overview of the uncertainties that weight on the Belgian certification calculation method parameters. It also presents variations that could be applied to the EPC calculation method in order to add behavioural parameters… inspired from case studies of buildings. [less ▲]

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See detailSmart Energy Regions : Belgium
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

in Jones, Phillip; Lang, Werner; Patterson, Joanne (Eds.) et al Smart Energy Regions (2014)

This paper first describes the energy balance of Wallonia, its evolution, the share of renewable energy and the targets related to energy policy. The second part of this paper focuses on a study led on a ... [more ▼]

This paper first describes the energy balance of Wallonia, its evolution, the share of renewable energy and the targets related to energy policy. The second part of this paper focuses on a study led on a small land in Villers-le-Bouillet. The goal here was to prove that smart incentives are needed in order to introduce on the market smart environment-friendly building solutions. [less ▲]

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See detailRéno2020: méthodologie d'insertion des nouvelles technologies dans la rénovation durable du logement wallon, rapport final
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

Report (2014)

For more than a decade, the Walloon government develops plans of economic redeployment; among them, the “Marshall Plan” financed (from 2009 to 2013) the “Reno2020” project, which general objective was to ... [more ▼]

For more than a decade, the Walloon government develops plans of economic redeployment; among them, the “Marshall Plan” financed (from 2009 to 2013) the “Reno2020” project, which general objective was to demonstrate that the existing Walloon residential stock provides a vast potential for improvement, especially as far as energy and environmental performance is concerned. Furthermore, this project involved different actors of the construction sector social microcosm: - The client, private or public owner of dwellings to be renovated. - The architect, author of the renovation project. - The contractors, transferring projected renovation into reality. - The material producers, developing ad hoc solutions to particular problems. - The scientific committee, composed of the Belgian Building Research Institute (BBRI, Sustainable Renovation Department), the Technical Control Bureau for Construction (SECO) and University of Liege, Energy and Sustainable Development (EnergySuD) research unit. [less ▲]

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See detailLa ventilation en rénovation, typologies des rénovations et inventaire des contraintes
Monfils, Stéphane ULiege

Conference given outside the academic context (2013)

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See detailLa maison zéro énergie, et après ?
Monfils, Stéphane ULiege

Conference (2012, December 05)

Introduction à la future réglementation, à la problématique des bâtiments existants et à la performance environnementale

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See detailUsing a DNA buiding code to manage the housing stock energy performance
Monfils, Stéphane ULiege; Hauglustaine, Jean-Marie ULiege

Scientific conference (2011, August)

The goal of this research is to qualify (and quantify) the Walloon residential building stock, in order to identify majority typologies which can be considered as representative of the Walloon dwelling ... [more ▼]

The goal of this research is to qualify (and quantify) the Walloon residential building stock, in order to identify majority typologies which can be considered as representative of the Walloon dwelling stock. This would therefore help us find potential improvement room, strategies of action when it comes to sustainable and large scale renovation of the described typologies. [less ▲]

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See detailReflex: development of a decision help tool for residential renovation
Hauglustaine, Jean-Marie ULiege; Monfils, Stéphane ULiege

Scientific conference (2011, August)

In Belgium, like in many European countries, the existing buildings represent the main part of the building stock. These buildings are relatively old, and most of the dwellings are not at all or not well ... [more ▼]

In Belgium, like in many European countries, the existing buildings represent the main part of the building stock. These buildings are relatively old, and most of the dwellings are not at all or not well thermally insulated; their airtightness is weak and their heating installations are old. We can find there real potential improvement and high possibilities of renovation. The owner, the contractor and the architect are confronted with many renovation options, and choosing the best intervention scenarios is never easy. It’s in this context that the software REFLEX (for Rénovation EFficace d’un Logement EXistant, in English: efficient renovation of an existing dwelling) has been developed. [less ▲]

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