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Det ønskes med denne rapport og det tilhørende arbejde, at afklare, om der er efterspørgsel efter en mærkningsordning for IndeklimaKvalitet for enfamiliehuse i et marked med andre certificeringssystemer. Afklaringen foretages med henblik på en evt. videreudvikling af det nuværende værktøj IK-kompas til etageboliger (udviklet i REBUS-projektet), til også at kunne beregne IndeklimaKvalitet for enfamiliehuse. Arbejdet har omfattet en vurdering af hhv. 1. IK-Kompas i relation til andre certificerings- og mærkningsordninger 2. Efterspørgsel på mærkning af IndeklimaKvalitet samt udkast til forretningsmodel 3. Pilottest af indeklimamærkning og IK-kompas hos ejendomsmæglere samt via Bolius, Det ønskes med denne rapport og det tilhørende arbejde, at afklare, om der er efterspørgsel efter en mærkningsordning for IndeklimaKvalitet for enfamiliehuse i et marked med andre certificeringssystemer. Afklaringen foretages med henblik på en evt. videreudvikling af det nuværende værktøj IK-kompas til etageboliger (udviklet i REBUS-projektet), til også at kunne beregne IndeklimaKvalitet for enfamiliehuse. Arbejdet har omfattet en vurdering af hhv. 1. IK-Kompas i relation til andre certificerings- og mærkningsordninger 2. Efterspørgsel på mærkning af IndeklimaKvalitet samt udkast til forretningsmodel 3. Pilottest af indeklimamærkning og IK-kompas hos ejendomsmæglere samt via Bolius

The hygrothermal behaviour of an outdoor ventilated crawl space with two different designs of the floor structure was investigated. The first design had 250 mm insulation and visible wooden beams towards the crawl space. The second design had 300 mm insulation and no visible wooden beams. One year of measurements was compared with simulations of temperature and moisture condition in the floor structure and crawl space. The measurements showed that the extra 50 mm insulation placed below the beams reduced moisture content in the beams below 20 weight% all year. A reasonable agreement between the measurements and simulations was found; however, the evaporation from the soil was a dominant parameter affecting the hygrothermal response in the crawl space and floor structure.

Appropriate window solutions are decisive for the design of 'nearly zero-energy' buildings with healthy and comfortable indoor environment. This paper focuses on the relationship between size, orientation and glazing properties of façade windows for different side-lit room geometries in Danish 'nearly zero-energy' houses. The effect of these parameters on space heating demand, daylighting and thermal environment is evaluated by means of EnergyPlus and DAYSIM and presented in charts illustrating how combinations of design parameters with minimum space heating demand can be selected within a solution space defined by targets for daylighting and thermal comfort. In contrast with existing guidelines, the results show an upper limit for energy savings and utilisation of solar gains in south-oriented rooms. Instead, low U-values are needed in both north- and south oriented rooms before large window areas lead to reductions in space heating demand. Furthermore, windows in south-oriented rooms have to be carefully designed to prevent overheating. Design options for prevention of overheating, however, correspond well with options for low space heating demand. Glazings with solar control coating are therefore obvious alternatives to dynamic solar shadings. Regarding room geometry, deep or narrow south-oriented rooms show difficulties in reaching sufficient daylight levels without overheating.

In Nordic countries significant primary energy saving potential exists in houses built before 1980. These old houses need to be renovated, which provides an opportunity for implementation of energy efficiency measures. However, there are several economic and market hindrances and the renovation markets are dominated by handicraft-based individual solutions. In this paper we have analyzed the opportunities for implementation of one-stop-shop business models where an overall contractor offers full-service renovation packages including consulting, independent energy audit, renovation work, follow-up (independent quality control and commissioning) and financing. A comparative assessment of emerging business models in the Nordic countries shows that different types of actors can provide such a service. Financing is included in some models. There are differences in how customers are contacted, while the similarities are on how the service is provided. Even though there is strong business potential for one-stop-shop energy renovation concept, still it has been somewhat difficult to start or run such a business. Various options to overcome the hindrances to promote energy efficient renovation of detached houses are discussed.

Der er behov for at reducere energiforbruget i bygninger, samt generelt at forbedre energieffektiviteten i byggesektoren i Danmark, som i resten af EU. Energibesparelser bør dog gå hånd i hånd med at sikre et sundt og behageligt indeklima. Formålet med denne afhandling er at bidrage til udviklingen af danske lavenergihuse med et godt indeklima. For at nå målet med en fossilfri energiforsyning i Danmark i 2050, skal der tages hensyn til både nybyggeri og renovering af eksisterende bygninger for at imødekomme fremtidens energibehov. For at tilskynde udviklingen af passende design af nye lavenergibygninger og facaderenovering af eksisterende bygninger, er der behov for mere viden om vinduesdesign. I forhold til vinduesdesignet i et typisk dansk enfamiliehus konstrueret i overensstemmelse med de nuværende og fremtidige energikrav, blev indflydelsen af vinduesstørrelse, -type og orientering af vinduerne undersøgt i forhold til rumvarmebehov og termisk indeklima i EnergyPlus ved at sammenligne et vinduesdesign med en jævn fordeling (samme rude-til-gulv-areal i hvert værelse), med et traditionelt vinduesdesign med store sydvendte vinduer. Betydningen af at inddele bygningen i termiske zoner på resultatet af rumvarmebehov og termisk indeklima, og dermed valget af vinduesdesign, blev også undersøgt. Når der skelnes mellem termiske zoner med direkte og indirekte solinskud, viste resultaterne, at valget af vinduets størrelse og retning ikke længere udgører en stor del af varmebehovet, så længe en lav U-værdi anvendes. Hvis en jævn vinduesfordeling anvendes i kombination med en passende udluftning og solafskærmning i de kritiske sydvendte rum, kan vinduerne i velisolerede bygninger placeres med stor arkitektonisk frihed. Derudover blev dagslyset undersøgt. Forholdet mellem forskellige vinduesparametre (rudeareal, orientering, U-værdi, g-værdi og lystransmittans) og hvordan disse påvirker energiforbruget, dagslys og termisk indeklima blev ved hjælp af DAYSIM og EnergyPlus un, There is a need to reduce energy consumption in buildings and in general improve energy efficiency in the building sector in Denmark, as in the rest of the EU. Energy savings, however, should go hand in hand with providing a healthy and comfortable indoor environment. So, the aim of this thesis is to contribute to the development of Danish low-energy residential buildings with good indoor environment. To reach the target of a fossil-free energy supply in Denmark by 2050, both new building design and renovation of existing buildings to meet future energy requirements need to be taken into account. To encourage the development of appropriate designs for new low-energy buildings and façade renovation of existing buildings, improved knowledge is needed on window design. The research consisted of two parts. First in relation to window design in a typical Danish single-family house constructed in accordance with current and future energy requirements, the influence of window size, type and orientation on space heating demand and thermal indoor environment were investigated in EnergyPlus by comparing a window design with an even distribution (same glazingto-floor-area in each room) with a traditional window design with large south-oriented windows. The influence of the thermal zone configuration on the prediction of space heating demand and thermal indoor environment, and therefore on the choice of window design, was also investigated. When distinguishing between thermal zones with direct and non-direct solar gains, results showed that the choice of window size and orientation is no longer a big issue from the perspective of heating demand as long as low glazing U-values are used. If an even window distribution is used in combination with an appropriate venting rate and solar control in critical southoriented rooms, windows can be positioned in the façade of well-insulated residential buildings with considerable architectural freedom. Second, daylight was considered an

Future tightening of the energy requirements increases focus on design of new and better performing buildings with good indoor environment and only limited extra cost compared to new buildings today. This paper presents a method for economic optimization of the design of new low energy dwellings that takes into account the indoor thermal environment. By use of the criterion of cost of conserved energy implemented in a Microsoft Excel sheet, a cost optimal design according to a targeted energy frame can be found. The resulting indoor thermal environment is then evaluated based on parametric analysis in the dynamic simulation tool WinDesign. If any changes have to be made to ensure a good indoor thermal environment, iteration between the two programs must be performed. An example is used to illustrate this process. It indicates that the method can be used from the early design phases to ensure that an economic design solution with good indoor environment can be identified. The example also shows that in order to ensure that buildings have low energy consumption, at minimum extra cost, more appropriate products and solutions will have to become available on the market at a competitive price.

Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Within an ERANET-ERACOBUILD project, this study investigates the opportunities and barriers to establish a “one stop shop” with an integrated supply side, to counteract the fragmented offer in sustainable renovation of single-family houses and to increase the level of knowledge, skills and innovations. Aspects of providing reliable information and guidance for house-owners are also included. Starting from a survey directed to the Flemish construction sector, we tried to distill the viewpoint and willingness of enterprises to cooperate in such a one-stop-shop idea. The survey concludes that the increase of holistic very low energy renovations is expected in a short time and that a large percentage of companies is willing to work together. However, socio-technical and know-how barriers to accomplish this still remain. With these results - and an analysis of existing websites providing an interface between suppliers and owner-occupants - business models, training and other activities will be set up to establish a one-stop shop model within the continuation of this project. A test case is foreseen., OTB Research, OTB Research Institute for the Built Environment

Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Within an ERANET-ERACOBUILD project, this study investigates the opportunities and barriers to establish a “one stop shop” with an integrated supply side, to counteract the fragmented offer in sustainable renovation of single-family houses and to increase the level of knowledge, skills and innovations. Aspects of providing reliable information and guidance for house-owners are also included. Starting from a survey directed to the Flemish construction sector, we tried to distill the viewpoint and willingness of enterprises to cooperate in such a one-stop-shop idea. The survey concludes that the increase of holistic very low energy renovations is expected in a short time and that a large percentage of companies is willing to work together. However, socio-technical and know-how barriers to accomplish this still remain. With these results - and an analysis of existing websites providing an interface between suppliers and owner-occupants - business models, training and other activities will be set up to establish a one-stop shop model within the continuation of this project. A test case is foreseen., OTB Research, OTB Research Institute for the Built Environment

There is both a need and a significant business potential for one-stop-shop business models where an overall contractor offers full-service renovation packages including consulting, independent energy audit, renovation work, independent quality control and commissioning, and financing. The renovation market for single-family houses could be in the order of hundreds of million Euros per year in each Nordic country.

Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Future tightening of the energy requirements increases focus on design of new and better performing buildings with good indoor environment and only limited extra cost compared to new buildings today. This paper presents a method for economic optimization of the design of new low energy dwellings that takes into account the indoor thermal environment. By use of the criterion of cost of conserved energy implemented in a Microsoft Excel sheet, a cost optimal design according to a targeted energy frame can be found. The resulting indoor thermal environment is then evaluated based on parametric analysis in the dynamic simulation tool WinDesign. If any changes have to be made to ensure a good indoor thermal environment, iteration between the two programs must be performed. An example is used to illustrate this process. It indicates that the method can be used from the early design phases to ensure that an economic design solution with good indoor environment can be identified. The example also shows that in order to ensure that buildings have low energy consumption, at minimum extra cost, more appropriate products and solutions will have to become available on the market at a competitive price.

There is both a need and a significant business potential for one-stop-shop business models where an overall contractor offers full-service renovation packages including consulting, independent energy audit, renovation work, independent quality control and commissioning, and financing. The renovation market for single-family houses could be in the order of hundreds of million Euros per year in each Nordic country.

The Nordic project “Successful Sustainable Renovation Business for Single-Family Houses (SuccessFamilies)”, with participants from Denmark, Finland, Norway and Sweden, deals with development of business models for full service energy efficient renovation of detached houses in Nordic countries. The background to this project is that the majority of these houses are more than 30 years old and need to be renovated, which provides opportunity for implementation of energy efficiency measures. The renovation market is dominated by handicraft-based individual solutions. There is a need for onestop-shop business models where an overall contractor offers full-service renovation packages including consulting, independent energy audit, renovation work, independent quality control and commissioning, and financing. There is a significant business potential for such a model as the volume of renovation market for single-family houses can reach hundreds of million Euros per year in each Nordic country. The project team analysed emerging business models to offer full-service renovation packages in the Nordic countries. A comparative assessment shows that different types of actors (renovation company, insulation company, energy utility, building product warehouse) can provide such a service. There are differences in how customers are contacted, while the similarities are more on how the service is provided. A main challenge is how to secure independent advising. Even though there is strong business potential for one-stop-shop energy renovation concept, still it has been somewhat difficult to start or run such a business. Various options to overcome the barriers to promote energy efficient renovation of detached houses are discussed in the final report.

In Nordic countries significant primary energy efficiency potential exists in houses built before 1980. These old houses need to be renovated, which provides an opportunity for implementation of energy efficiency measures. However, there are several economic and market barriers and the renovation market are dominated by handicraft-based individual solutions. In this project we analyze the opportunities for implementation of one-stop-shop business models where an overall contractor offers full-service renovation packages including consulting, independent energy audit, renovation work, follow-up (independent quality control and commissioning) and financing. A comparative assessment of emerging business models shows that different types of actors (renovation company, insulation company, energy utility, building product warehouse) can provide such a service. Financing is included in some models. There are differences in how customers are contacted, while the similarities are more on how the service is provided. A main challenge is how to secure independent advising and there is there is uncertainty over who will be responsible for guarantee of the renovation work if the service provider goes bankrupt. Even though there is strong business potential for one-stop-shop energy renovation concept, still it has been somewhat difficult to start or run such a business. Various options to overcome the barriers to promote energy efficient renovation of detached houses are discussed.

Future tightening of the energy requirements increases focus on design of new and better performing buildings with good indoor environment and only limited extra cost compared to new buildings today. This paper presents a method for economic optimization of the design of new low energy dwellings that takes into account the indoor thermal environment. By use of the criterion of cost of conserved energy implemented in a Microsoft Excel sheet, a cost optimal design according to a targeted energy frame can be found. The resulting indoor thermal environment is then evaluated based on parametric analysis in the dynamic simulation tool WinDesign. If any changes have to be made to ensure a good indoor thermal environment, iteration between the two programs must be performed. An example is used to illustrate this process. It indicates that the method can be used from the early design phases to ensure that an economic design solution with good indoor environment can be identified. The example also shows that in order to ensure that buildings have low energy consumption, at minimum extra cost, more appropriate products and solutions will have to become available on the market at a competitive price.

existing single-family houses in the Nordic countries are to have competitive power compared to new buildings on the future housing market. Good technical solutions exist but need to be combined based on the full range of (standard) solutions in order to reach the low primary energy level of new houses. A one-stop-shop in the form of a full-service concept could be seen as a possibility to make it easy for the homeowner to comply with possible future requirements to realize far-reaching energy savings in connection with extensive renovations, provided that the building sector offers the solutions. Such one-stop-shops in the form of full-service providers of energy efficient renovation of single-family house are missing in the Nordic countries, although this service is vital to open up the market. As part of the Nordic research project `SuccesFamilies´ with the purpose to change the business environment in order to speed up the implementation of sustainable renovation of single-family houses –a sustainable renovation concept suitable for different categories of single-family houses with regard to type and age has been proposed in this article. The sustainable renovation concept includes an ideal full-service concept and technical renovation solutions targeted to different types of single-family houses.

Due to the introduction of low energy standards for new houses as minimum requirements, rising energy prices and generally more focus on energy performance, there is a need for farreaching energy efficiency improvements in connection with renovation if existing singlefamily houses in the Nordic countries are to have competitive power compared to new houses on the future housing market. If the market is able to explain this to the homeowners there is an open market with undreamt-of possibilities. Good technical solutions exist but need to be combined based on the full range of (standard) solutions in order to reach the low primary energy level of new houses. The typical single-family houses identified to have large primary energy saving potential almost descend from the same time period in each Nordic country. The first segment is houses built in large numbers in the 1960 and 1970 before tightening of the insulation standards in the building codes in the late 1970’s due to the oil crisis. The second segment is houses built before 1945 (except for Finland) where a large part of them has been renovated, but energy renovation of those houses today would still account for a large energy saving. The third segment is type houses from the post-war period in Finland. A complete energy efficient renovation of a typical house include post-insulation and sealing of the buildings envelope - roof/ceiling, façade, windows/doors and foundation and maybe slab on ground - installation of a mechanical ventilation system with high efficiency heat recovery and low electricity use and if not already there, an energy efficient heating system based on district heating, heat pump etc. This package of technical solutions can be carried out during an overall or step wise planned renovation dependent on the condition of the house, the financial possibilities of the homeowner etc. Calculation of packages of energy efficient renovation solutions targeted the three segments of houses show that pr

Windows affect energy consumption for heating and cooling of buildings and their thermal indoor environment. Standard energy calculation programs do not enable an easy comparison of different window designs, even though this is very important in the early stages of the building design process. A user-friendly calculation program based on simple input data has recently been developed to assist engineers and architects during the process of selecting suitable windows for residential building design. The program is organised in four steps, which together represent an analysis of how windows in a specific building design perform with regard to energy consumption, thermal indoor environment, and cost. The analyses in the steps gradually increase in level of detail and support the design decisions throughout the design process. This document presents work done to validate the program and demonstrates that the effect of orientation and window size on heating demand has decreased in well-insulated dwellings of today. Windows can be positioned in these dwellings with a considerable degree of architectural freedom with no significant increase in heating demand. However, an even window distribution is recommended, because this provides a generally improved daylight level, a better thermal indoor environment, and a reduced cooling demand.

OTB Reseach, OTB Research Institute for the Built Environment

OTB Reseach, OTB Research Institute for the Built Environment

The report focuses on analyses of the most promising existing sustainable renovationconcepts, i.e. full-service concepts and technical concepts, for single-family houses. As abasis for the analyses a detailed building stock analysis was carried out. Furthermore, ageneral method as proposal for package solutions for sustainable renovation is described. Themethod contains investigation of the house, proposal for sustainable renovation and detailedplanning as well as commissioning after renovation.The building stock analysis shows that detached single-family houses account for large shareof the total number of dwellings in all Nordic countries. Electric heating (and oil heating) ofsingle-family houses is very common in the Nordic countries, except for Denmark whereoil/gas boiler and district heating is mostly used. Natural ventilation is widespread inDenmark while mechanical ventilation is also often used in Norway, Sweden and Finland.Houses in Norway, Sweden and Finland are typically built with wood as a main constructionmaterial, but the insulation and/or finishing materials differ. In Denmark bricks are used as adominant construction material for cavity walls.The typical single-family houses identified to have large primary energy saving potentialalmost descend from the same time period in each Nordic country. The first segment is housesbuilt in large numbers in the 1960 and 1970. The second segment is houses built before 1940pre-war (except for Finland) where a large part of them has been renovated, but energyrenovation of those houses today would still account for a large energy saving. The thirdsegment is houses from the post-war period in Finland, houses that are all individual but builtin the same way, using the same materials.Existing full-service renovation concepts in the Nordic countries have just recently enteredthe market and are not well established and their success is yet to be evaluated. Companiesmay improve concepts by a more integrated approach and, Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Due to the introduction of low energy standards for new houses as minimum requirements,rising energy prices and generally more focus on energy performance, there is a need for farreachingenergy efficiency improvements in connection with renovation if existing singlefamilyhouses in the Nordic countries are to have competitive power compared to new houseson the future housing market. If the market is able to explain this to the homeowners there isan open market with undreamt-of possibilities. Good technical solutions exist but need to becombined based on the full range of (standard) solutions in order to reach the low primaryenergy level of new houses.The typical single-family houses identified to have large primary energy saving potentialalmost descend from the same time period in each Nordic country. A complete energyefficient renovation of a typical house include post-insulation and sealing of the buildingsenvelope - roof/ceiling, façade, windows/doors and foundation and maybe slab on ground -installation of a mechanical ventilation system with high efficiency heat recovery and lowelectricity use and possibly an energy efficient heating system based on district heating, heatpump etc. This package of technical solutions can be carried out during an overall or step wiseplanned renovation dependent on the condition of the house, the financial possibilities of thehomeowner etc.Calculation of packages of energy efficient renovation solutions targeted the three segmentsof houses show that primary energy use and heating bill can be reduced with up to about 75%or a factor 4 corresponding to the level of a new house or better. It seems that the passivehouse level can not quite be reached with standard solutions. They require that moreambitious measures are applied. The total investment needed to reduce the heating bill by afactor 4 including replacement of e.g. roof and windows is up to EUR 100,000. It is generallydifficult to obtain an economy in balance in the sense that, Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

existing single-family houses in the Nordic countries are to have competitive power compared to new buildings on the future housing market. Good technical solutions exist but need to be combined based on the full range of (standard) solutions in order to reach the low primary energy level of new houses. A one-stop-shop in the form of a full-service concept could be seen as a possibility to make it easy for the homeowner to comply with possible future requirements to realize far-reaching energy savings in connection with extensive renovations, provided that the building sector offers the solutions. Such one-stop-shops in the form of full-service providers of energy efficient renovation of single-family house are missing in the Nordic countries, although this service is vital to open up the market. As part of the Nordic research project `SuccesFamilies´ with the purpose to change the business environment in order to speed up the implementation of sustainable renovation of single-family houses –a sustainable renovation concept suitable for different categories of single-family houses with regard to type and age has been proposed in this article. The sustainable renovation concept includes an ideal full-service concept and technical renovation solutions targeted to different types of single-family houses.

Windows affect energy consumption for heating and cooling of buildings and their thermal indoor environment. Standard energy calculation programs do not enable an easy comparison of different window designs, even though this is very important in the early stages of the building design process. A user-friendly calculation program based on simple input data has recently been developed to assist engineers and architects during the process of selecting suitable windows for residential building design. The program is organised in four steps, which together represent an analysis of how windows in a specific building design perform with regard to energy consumption, thermal indoor environment, and cost. The analyses in the steps gradually increase in level of detail and support the design decisions throughout the design process. This document presents work done to validate the program and demonstrates that the effect of orientation and window size on heating demand has decreased in well-insulated dwellings of today. Windows can be positioned in these dwellings with a considerable degree of architectural freedom with no significant increase in heating demand. However, an even window distribution is recommended, because this provides a generally improved daylight level, a better thermal indoor environment, and a reduced cooling demand.

Due to the introduction of low energy standards for new houses as minimum requirements, rising energy prices and generally more focus on energy performance, there is a need for farreaching energy efficiency improvements in connection with renovation if existing singlefamily houses in the Nordic countries are to have competitive power compared to new houses on the future housing market. If the market is able to explain this to the homeowners there is an open market with undreamt-of possibilities. Good technical solutions exist but need to be combined based on the full range of (standard) solutions in order to reach the low primary energy level of new houses. The typical single-family houses identified to have large primary energy saving potential almost descend from the same time period in each Nordic country. The first segment is houses built in large numbers in the 1960 and 1970 before tightening of the insulation standards in the building codes in the late 1970’s due to the oil crisis. The second segment is houses built before 1945 (except for Finland) where a large part of them has been renovated, but energy renovation of those houses today would still account for a large energy saving. The third segment is type houses from the post-war period in Finland. A complete energy efficient renovation of a typical house include post-insulation and sealing of the buildings envelope - roof/ceiling, façade, windows/doors and foundation and maybe slab on ground - installation of a mechanical ventilation system with high efficiency heat recovery and low electricity use and if not already there, an energy efficient heating system based on district heating, heat pump etc. This package of technical solutions can be carried out during an overall or step wise planned renovation dependent on the condition of the house, the financial possibilities of the homeowner etc. Calculation of packages of energy efficient renovation solutions targeted the three segments of houses show that pr

existing single-family houses in the Nordic countries are to have competitive power compared to new buildings on the future housing market. Good technical solutions exist but need to be combined based on the full range of (standard) solutions in order to reach the low primary energy level of new houses. A one-stop-shop in the form of a full-service concept could be seen as a possibility to make it easy for the homeowner to comply with possible future requirements to realize far-reaching energy savings in connection with extensive renovations, provided that the building sector offers the solutions. Such one-stop-shops in the form of full-service providers of energy efficient renovation of single-family house are missing in the Nordic countries, although this service is vital to open up the market. As part of the Nordic research project `SuccesFamilies´ with the purpose to change the business environment in order to speed up the implementation of sustainable renovation of single-family houses –a sustainable renovation concept suitable for different categories of single-family houses with regard to type and age has been proposed in this article. The sustainable renovation concept includes an ideal full-service concept and technical renovation solutions targeted to different types of single-family houses.

Deliverable 1.1, Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Deliverable 1.1, Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Deliverable 1.1, Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Deliverable 1.1, Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Deliverable 1.1, Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Deliverable 1.1, Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Deliverable 1.1, Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Deliverable 1.1, Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

Deliverable 1.1, Successful Sustainable Renovation Business for Single-Family Houses - SuccessFamilies

The Nordic single-family house renovation market is dominated by a craftsman based approach with individual solutions, traditional warehouses ”do-it-yourself-shops” and some actors marketing single products. To speed up the implementation of sustainable renovation of single-family houses there is a great need for full-service packages including consulting, contract work, follow-up, financing and operation and maintenance. There are few Nordic examples of such service models for renovation of single-family houses which entered the market recently. The success of these concepts is yet to be evaluated. One successful full-service package described in the report is a campaign by an energy company in Sweden who convinced 78% of 456 owners of houses with resistance heaters to connect to its biomass based district heating network. The campaign was successful because of its package offer and information provision with emphasis on economic aspects and functional reliability. The existing technical renovation concepts, typically focussing on application of only a few of the available technical solutions, have not been successful in realizing large scale energy efficiency gains. Renovation of single-family houses might be carried out based on design solutions with good combinations of the possible range of technical solutions including e.g. “passive (insulation) measures” and “solar measures” in order to reach a low primary energy level. Key aspects of reaching a low primary energy level in connection with renovation are described in the form of typical energy renovation measures and technical principles of low energy renovation including recommended extent of measures. Full service and technical renovation concepts should make it easy, simple and secure for the consumer to invest in a low energy renovation of their house. The building sector needs easy to use knowledge and initiatives which ensures that they can offer solutions which fulfil the demand for quality, economy and