This thesis examines the opportunities towards streamlining energy efficiency in the existing built environment in Sweden. Through this case study, the aim has been to optimise two 20th century buildings, one apartment building and one workshop building, located at different latitudes in the country. The goal has been to reduce the heat energy consumption, increase energy performance and lift the buildings to an energy class that meets the requirements for newly produced buildings, according to the regulations of Boverket. In the simulation software BIM Energy, the buildings have been the subjects of different renovation strategies in order to discover what measures are most energy efficient. An LCC analysis was performed to discover what measure is the most cost efficient in relation to its thermal energy improvements. The existing technical and energy data of each building have been used for the creation of a realistic simulation model as of its present conditions. The study has shown that a combination of renovations strategies generated the best results, and that the more expensive the intervention gets, the higher returns of investment. The study of energy performance showed that the new geographical adjustment factor and primary energy factor established by Boverket has a significant impact on how a building is classified, whereupon the choice of primary energy source can determine whether a building is ranked as passive house or energy thief. Though as standalone measures, when coming to reduction of the energy heat demand, a FTX-system have been proven superior with added external insulation as a solid second.

Building sector in Sweden constitutes a major part of the overall energy consumption, making up for around 40% of the total energy use. During the 60s and 70s, there was a big surge in housing in Sweden with over a million dwellings, both single family houses and multi-family apartments, constructed over a period of ten years. These buildings constructed according to the pre-oil crisis standards, suffer from poor energy performance and are in dire need for large scale renovations. This makes it a very interesting area to focus on to meet the Swedish government targets of 50% energy reduction by 2050. This study tries to assess the prevailing situation in multifamily housing sector and focuses on various obstacles and hinders in the path towards achieving long term energy saving goals. A model has been developed using bottom-up approach to study different scenarios for energy use in 2050 based on various renovation possibilities in the building stock.

Most of the detached houses in Sweden were built more than 30 years ago, and most of them are oldand need a deep renovation. The renovation is an excellent opportunity to apply the energy measure witha combination of renewable energy such as PV solar, which could be a great option to reduce energyconsumption and contribute to reducing greenhouse emissions. For this reason, selecting effectiverenovation scenarios for buildings could be important and challenging. One of these challenges isapplying typical scenarios for one archetype's buildings. A building could be in the same archetypeswith similar geometry and properties but in different directions. In this study, the researcher aims toinvestigate the yearly heat demand energy saving of buildings from one archetype, the same renovationscenario, and the same area but in four different directions, 0-30-60-90 degrees from the south (casestudies).This project's additional aim is to examine the electricity generation from PV when installedon one and both sides for four houses in the same area in four different directions, 0-30-60-90 degreesfrom the south. Design Builder software was used as a graphical user interface through the Energy Plus engine. In thisway, the heat demand of case studies was simulated for different scenarios (Standard renovation andadvanced renovation) in the Växjö region. The results from the simulation of the houses with differentdirections showed that the heat demand energy decreased by, on average, 20% for standard and 28% foradvanced renovation. The comparison of the case studies with the same renovation scenario concludesthat they are no differences in the heat energy savings, which means the direction of the building has nobig impact on the energy saving of the renovation scenario in the Växjö region. The installation side ofthe PV has no impact on the annual electricity generation from PV for the house with a direction of 0degrees from the south. For the other houses, the yearly electricity generation from the PV increased by36.8% with one side on the roof (South direction). House number 4 is the best direction to install PVwith one side on the roof (south direction), and house 3 is the next best direction to install PV on oneside. When installed on both sides of the roof, the annual electricity generation from the PV decreased by5,3% with four houses in different directions. The changes are not so high may be due to the weather ofthe Växjö, which is 65 % cloudy according to the weather data file from TMY. Another reason is thatthe PV was installed on both sides of the pitched roof. When the houses have different directions, 0 to90 degrees from the south, that may be increased the electricity generation from the PV on one side andreduce it on the other.

Transforming the first floor of a 1950s building at Sveavägen, Stockholm, this project aims to redefine the traditional cinema. This is not a perfect quiet black box, but a place for sharing, experiencing and discussing film. A cinema for independent films, short films, documentaries and film festivals, but perhaps also presentations and lectures. A flexible building that can open up, or close down, depending on the event. A cinema where one can sit down for a brief movement with a coffee, or spend an evening at the big screen.

Buildings from the record year era are now 40 – 55 years old and in many cases in need of extensive renovation measures. This need for renovation could be seen as an opportunity to achieve overarching sustainability target levels and to perform renovation with a holistic approach. This thesis aims at creating support for the formulation and achievement of adequate environmental targets that relate to overarching Swedish Environmental Quality Objectives. The overall aim of the thesis is to contribute to an understanding of the current situation of environmental management in renovation processes. The scope of this thesis is limited to the aspects energy use and greenhouse gas (GHG) emissions from energy use and material production. This thesis contributes to this aim with a stepwise procedure for evaluation of measures together with a proposal for target levels for three environmental aspects. The first paper appended to this thesis investigates how six Swedish property owners performed renovation projects. From this paper it can be concluded that the main barrier (except economic ones) are characterized by lack of knowledge about overarching objectives and what aspects define a sustainable built environment. The second paper assesses embodied GHG emissions due to material production for the totality of measures needed to reduce operational energy demand per unit heated floor area by 50% compared with 1995. On a national level, embodied GHG emissions are estimated to be 12% of the reduction of GHG emissions achieved by operational energy demand reduction. The final paper appended to this thesis uses a case study building to illustrate a working procedure to identify project-specific target levels for three environmental aspects. In addition, it identifies indicative improvements necessary for the achievement of long-term targets for those aspects, which could be focused and further investigated in later project stages with the help of a long-term plan of action. / <p>QC 20160926</p>

This paper explores how cities have integrated formal planning into improving public space. Through a review of literature on the topic, this the paper identifies the potential design has to renovate narrow streets and alleys, within the public right of way. By preforming an assessment of plans and programs, this paper identifies the common themes or components that have been used by planners, architects, and engineers to improve the urban environment for pedestrians. Based on this information, a pilot study was created to measure the influence the most common components have on pedestrian route choice. The results are then compared to the information gathered from the assessed plans and programs. Suggestions for expanding the pilot study and other recommendations are presented upon the conclusion of this report.

Разработана экономическая модель формирования инвестиций в попериодный горизонт до 15,30,50 лет и требуемой ставке дохода с применением функции «формирования фонда возмещения» определены равномерные периодические платежи, необходимые для получения итогового объема инвестиций в будущем. / An economic model has been developed for the formation of investments in a period horizon of up to 15,30,50 years and the required rate of return using the function of "formation of the compensation fund" determined uniform periodic payments necessary to obtain the final volume of investments in the future.

Energianvändningen har ökat markant globalt sedan 1971, vilket har påverkat klimatet och orsakat global uppvärmning. För att minska energiförbrukningen och dess påverkan på klimatet har Sverige fastställt energi- och klimatmål fram till år 2030. Sektorn för bygg- och fastigheter har en stor roll att spela i att minska utsläppen av växthusgaser eftersom den stod för 15,9 miljoner ton koldioxidekvivalenter år 2020. Syftet med denna studie är att undersöka möjliga alternativa lösningar och åtgärder som kan minska både energiförbrukningen och kostnaderna samtidigt som klimatpåverkan från byggnader minskas. Fokus ligger på att tillämpa dessa åtgärder på ett småhus i Markaryd. I studien användes litteraturstudier, intervjuer och beräkningsprogram som Bidcon, energiberäkning.se och pay off-metoden. Resultaten visar att renoveringsåtgärder, såsom fönster- och dörrbyte, tilläggsisolering av vinden och installation av ett mekaniskt ventilationssystem, minskade energiförbrukningen och var ekonomiskt fördelaktiga när de kombinerades med andra åtgärder. Undersökningen visar att trä och cellulosa hade lägre klimatpåverkan än aluminium och glasull i skedena A1-A5. Renoveringsåtgärder, med rätt val av material, kan således minska energiförbrukningen och klimatpåverkan samtidigt som de är ekonomiskt fördelaktiga, vilket leder till positiva effekter för både miljön och ekonomin. / Studies indicate that renovation projects have significantly lower environmental impact compared to new constructions, with emissions reduced by up to 50 % due to the reuse of existing materials. The purpose of this study is to explore alternative solutions and strategies that can effectively reduce both energy consumption and costs, while mitigating the climate impact of buildings. The focus is specifically on applying these measures to a small house in Markaryd. The research methodology involved a combination of literature reviews, interviews, and the utilization of calculation tools such as Bidcon, energiberäkning.se, and the pay-off method. The results demonstrate that renovation measures such as window and door replacement, additional insulation in the attic, and the installation of a mechanical ventilation system effectively reduced energy consumption and proved economically viable. The investigation also revealed that wood and cellulose materials had lower climate impact compared to aluminum and glass wool in stages A1-A5. Therefore, renovating buildings with careful material selection can simultaneously achieve reduced energy consumption and climate impact, while also offering economic benefits, thereby contributing positively to both the environment and the economy.

Bygg- och fastighetssektorn orsakar en femtedel av Sveriges växthusgasutsläpp. Användningsskedet, ett av fyra skeden i en byggnads livscykel, utgjorde tidigare den största påverkan på klimatet. Idag sker de största utsläppen i byggskedet. Flertalet undersökningar har gjorts för att minska miljöpåverkan från nyproduktion däremot saknas motsvarande mängd data för ombyggnationer och renoveringar.För att öka förståelsen för miljöpåverkan från resursanvändningen inom bygg- och fastighetssektorn har det i denna studie gjorts en jämförelse av växthusgasutsläppen från att flytta och renovera ett småhus med att riva ett småhus och ersätta det med en nybyggnation. I studien undersöktes byggnader som flyttats i Kiruna där en samhällsomvandling pågår till följd av LKAB:s järnmalmsbrytning. Livscykelanalyser genomfördes för byggskedet och slutskedet för två objekt; Arbetarbostaden B5 samt en nyproduktion från Älvsbyhus. Enheten kg CO2e/m2 BTA (bruttoarea) användes i klimatberäkningarna. Energianvändningen i gamla och nya hus undersöktes och användes för att jämföra växthusgasutsläppen från materialen i ett nytt hus med en högre energianvändning i ett äldre hus. Resultatet visar att mängden material korrelerar till mängden växthusgasutsläpp vilket indikerar att renoveringen av ett småhus skapar ett lägre klimatavtryck än vad en nybyggnation gör. Resultatet visar också att det kan ta många år innan energibesparingen som ett nytt hus medför jämfört med ett gammalt hus väger upp för utsläppen från materialåtgången för nybyggnationen. Om ett hus ska flyttas och renoveras eller rivas och ersättas med en nybyggnation bör bedömas individuellt då renoveringsbehovet kan skilja sig åt från objekt till objekt / The construction and real estate sector is responsible for one fifth of Sweden's greenhouse gas emissions. The use phase, one of four stages in a building's life cycle, previously had the greatest impact on the climate. Today, the largest emissions occur in the construction phase. Several studies have been carried out to reduce the environmental impact of new construction, but there is no corresponding amount of data for conversions and renovations. To increase understanding of the environmental impact of resource use in the construction and real estate sector, this study compares the greenhousegas emissions from moving and renovating a small house with demolishing a small house and replacing it with a new building. The study examined relocated buildings in Kiruna where a societal transformation is taking place because of LKAB´s iron ore mining operations. Life cycleanalyses were conducted for the construction phase and the final phase for two objects: Arbetarbostaden B5 and a new production from Älvsbyhus.The unit kg CO2e/m2 BTA (gross area) was used in the climate calculations. The energy use in old and new houses was investigated and used to compare the greenhouse gas emissions from the materials in a new house with a higher energy use in an older house.The results show that the amount of material correlates to the amount of greenhouse gas emissions, indicating that the renovation of a small house creates a lower carbon footprint than a new construction. The results also show that it can take many years for the energy savings of a new house compared to an old house to compensate for the emissions from the material consumption of the new construction. Whether a house should be moved and renovated or demolished and replaced with a new building should be assessed individually as the need for renovation can differ from object to object. / <p>2023-06-02</p>

De senaste åren har frågan om hållbar utveckling tagit allt större plats i samhällsdebatter. När det gäller fastighetssektorn har denna fråga och miljömål främst riktats mot nybyggnationer. Samtidigt byggdes majoriteten av fastigheterna i Sverige innan 1970 och ersätts av nya byggnader i en hastighet på 1–3% per år. Med det i åtanke påträffas ett stort gap som den här studien har för avsikt att adressera. Detta genom att undersöka miljöaspekters påverkan vid renoveringar av byggnader och specifikt med hänsyn till materialval av golv. Studien undersöker tre olika perspektiv. Genom en litteraturstudie har ett urval av golvmaterial utretts med avseende på klimatpåverkan mätt som Global Warming Potential (GWP100), energiåtgång och kemiska restprodukter. Därefter har en analys gjorts över vilka krav och riktlinjer som ställs från miljöcertifieringssystemets sida genom en dokumentanalys och slutligen har miljöaspekternas betydelse vid renovering ur ett fastighetsbolags perspektiv undersökts genom en fallstudie hos fastighetsbolaget Hufvudstaden. Litteraturstudien visade på, för de undersökta miljöaspekterna, att linoleumgolv presterar bäst på en kort tidshorisont på 8 år och parkettgolv presterar bättre än de andra golvtyperna i en tidshorisont på över 20 år. Ett flertal av de inhämtade studierna undersökte även kemiska restprodukter, slutsatsen blev att de ämnen som studierna tog upp inte anses att vara farliga. Däremot bör det ej uteslutas att golven kan producera andra kemiska restprodukter som kan ha en negativ påverkan på sin omgivning. Gällande certifieringssystemen framgick det att material har en mindre roll i certifieringsprocessen, maximalt 12—14 % av de totala poängen. Det visade sig att de lägger vikt på att renoveringsarbete tidigt planeras för hållbara processer, bland annat genom att välja material med hållbarhet i åtanke och underhålla det med omsorg. Utifrån certifieringssystemens villkor och rekommendationer ses parkettgolv som det mest lämpade valet utav de undersökta golvtyperna. I fastighets- och byggbranschen premieras oftast parkettgolv utav de undersökta golven i detta arbete. Både IVL Svenska Miljöinstitutet och fastighetsbolaget Hufvudstaden anser att golvet är det mest lämpade vid renoveringar med en lång livslängd i åtanke. / The issue of sustainability has been highlighted more frequently in recent years. In the case of the real estate industry the environmental objectives have primarily been set with respect to new construction. However, the majority of the properties in Sweden were built before the 1970’s and buildings are replaced at a rate of only 1-3% per year. Keeping this in mind, an important research gap is present. This study aims to contribute to the narrowing of that gap by examining the environmental impacts of renovations in existing buildings and specifically with respect to the choice of flooring materials. The study was conducted through three perspectives. Firstly, by examining literature on a selection of flooring materials with regards to Global Warming Potential (GWP100), energy consumption and chemical residues. Secondly by analyzing guidelines provided by sustainability certifications through a document analysis. The last perspective was studying the choice of flooring material from a real estate company point of view, conducted through a case study. The literature study showed, for the investigated environmental aspects, that linoleum floors perform best on a short time horizon of 8 years and parquet floors perform in a longer time horizon of over 20 years. A number of the examined studies also investigated the chemical residues from the materials that may have a negative impact on the environment, but the conclusion was that the substances were not shown to be dangerous. However, it should not be ruled out that the floors may produce other chemical residues that may have a negative impact on their surroundings. Regarding the certification systems, it was found that materials play a smaller role in the certification process, a maximum of 12-14% of the total points. It turned out that certification systems place emphasis on early planning for sustainable processes in construction, including choosing materials with sustainability in mind and maintaining them with care. Based on the conditions and recommendations of the certification systems, parquet floors are seen as the most suitable choice of the floor types examined. The real estate and construction industry commend the parquet floors out of the examined flooring types, due to its ability to be maintained and its long life-span.