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Low-energy house

A low-energy house is characterized by an energy-efficient design and technical features which enable it to provide high living standards and comfort with low energy consumption and carbon emissions. Traditional heating and active cooling systems are absent, or their use is secondary.[1][2] Low-energy buildings may be viewed as examples of sustainable architecture. Low-energy houses often have active and passive solar building design and components, which reduce the house's energy consumption and minimally impact the resident's lifestyle. Throughout the world, companies and non-profit organizations provide guidelines and issue certifications to guarantee the energy performance of buildings and their processes and materials. Certifications include passive house, BBC—Bâtiment Basse Consommation—Effinergie (France), zero-carbon house (UK), and Minergie (Switzerland).[3]

A thermogram compares the heat radiation of the windows and walls of two buildings: a sustainable, low-energy passive house (right) and a conventional house

Buildings alone were responsible for 38% of all human Greenhouse gas emissions (GHG) as of 2008, with 20% attributed to residential buildings and 18% to commercial buildings.[4] According to the Intergovernmental Panel on Climate Change (IPCC), buildings is the sector which presents the most cost effective opportunities for GHG reductions.[5]

Background edit

During the 1970s, research on low-energy buildings was done in Denmark, Sweden, Germany, Canada, and the United States. The implementation of standardized low-energy building concepts has developed differently in each country.[6]

Canada edit

In the late 1970s, the province of Saskatchewan contracted the Saskatchewan Research Council to design and build a passive solar house suitable for the extreme climate of the Canadian prairies, where winter temperatures can drop to negative 40 degrees Celsius (-40°F).[7] The project resulted in the construction of the Saskatchewan Conservation House in Regina in 1977 by a team led by engineer Harold Orr.[8] The project developed a heat recovery air exchanger (HRV), hot water recovery, and a blower-door apparatus to measure building air-tightness, techniques that became common in low-energy building in other parts of the world.[9] Orr would go on to apply many of those techniques to retro-fitting existing buildings to improve energy efficiency.[10][11]

Germany edit

Triggered in the 1970s by the first energy crisis and growing environmental awareness, energy conservation became increasingly important in Germany.[12] In 1977, the country's first energy-related building standard was enacted. The German Passivhaus Institute introduced the first certified passive house in 1990. The annual heating requirement was introduced as an important parameter by the third German Thermal Insulation Ordinance (1995). In 2013, however, there was no clear legal requirement for a low-energy building standard in Germany. According to Maria Panagiotidou and Robert J. Fuller, definitions, policies and construction activity of zero-energy buildings must be clear.[13] The European Union's Energy Performance Directive requires that beginning in 2021, only low-energy buildings may be built.[14]

United Kingdom edit

Changes to national policies have occurred since May 2015 in the UK. One of the most significant has been the withdrawal of the Code for Sustainable Homes (CfSH) as a system for assessing and encouraging improvements in the environmental design of dwellings.[15] This has abandoned the code's schematic which provided a framework of achievement levels and to which low-energy designers could aspire to meet or surpass. Although energy-conservation legislation still exists in the building regulations,[16] there is a lack of suitable standards exceeding basic regulations. As a result, the Passive House Standard may expand its influence and impact on energy-efficient houses.[17]

United States edit

Interest in low-energy buildings has increased in the United States, primarily due to rising energy prices, decreasing costs for onsite renewable-energy systems, and increasing concern about climate change. California requires all new residential construction to be zero net energy by 2020.[1]

Types edit

Low-energy houses are broadly defined, but are generally known as houses with a lower energy demand than common buildings regulated by the national building code. The term "low-energy house" is used in some countries for a specific type of building.[18]

A low-energy house is a guideline rarely specified in actual values (heat load or space-heating minimum). A passive house is a standard, with specific recommendations to save heating energy.

At one end of the spectrum are buildings with an ultra-low space-heating requirement which require low levels of imported energy (even in winter), approaching an autonomous building. At the opposite end are buildings where few attempts are made to reduce their space-heating requirement and which use high levels of imported energy in winter. Although this may be balanced by high levels of renewable-energy generation throughout the year, it imposes greater demands on the national energy infrastructure during winter.

National standards edit

The term "low-energy houses" may refer to national building standards.[19] These standards sometimes seek to limit the energy used for space heating, which is the largest energy consumer in many climate zones. Other energy uses may also be regulated. The history of passive solar building design provides an international view of one form of low-energy-building development and standards.

Europe edit

Standards for low-energy buildings in Europe have proceeded differently in each country, and there is no common certification or legislation for low-energy buildings valid in all EU member states. As a movement towards reducing energy use and emissions, a common legislation concerning buildings’ energy performance, the Energy Performance of Buildings Directive (EPBD) was published in 2002 and became effective in January 2003.[20]

Norway edit

In NS 3700, the draft official standard, low-energy buildings are defined. About the buildings' energy performance, two alternatives for rating their primary energy use are under discussion:

  • A limit on a building's annual CO2 emissions, calculated by multiplying the annual supplied energy by a CO2 factor
  • A percentage of its heating demand must be met with renewable energy.

Denmark edit

Low-energy houses are defined in the National Building Regulation Building Regulations 08, and are divided into two classes. They are regulated in the regulations' chapter 7.2.4: Low-energy.

Germany edit

Low-energy houses certified by RAL-GZ 965 have 30 percent less heat losses than regulated in the EnEV, a national building code. Other criteria affect insulation, air tightness and ventilation. Low-energy buildings may be certified by RAL-GZ 965 for planning or construction.[18]

Switzerland edit

Low-energy buildings may receive the Minergie certification, a "quality label for new and refurbished buildings". The Minergie standard requires that buildings do not exceed 75 percent of average building energy consumption and fossil-fuel consumption must not exceed 50 percent of the average.[21]

North America edit

The European Union directive has clarified low-energy houses in Europe, and a large portion of the discussions on zero-energy building in North America derives from the U.S. National Renewable Energy Laboratory (NREL).[22]

The Energy Star program is the largest certifier of low-energy homes and consumer products in the U.S. Although certified Energy Star homes use at least 15 percent less energy than standard new homes built in accordance with the International Residential Code, they typically achieve a 20- to 30-percent savings.[23] The United States Department of Energy introduced a program in 2008 to distribute zero-energy housing across the country.[24]

Canadian builders may use a range of standards, labels, and certification programs to demonstrate a high level of energy performance in a given project. These include:

In British Columbia the above programs align with the BC Energy Step Code, a provincial regulation to incentivize (or require) a level of energy efficiency in new construction beyond the base building code. The code was designed as a technical road map to help the province reach its target of all new net-zero-energy-ready buildings by 2032.

Obstacles and opportunities edit

Energy-efficient design often relies on new technologies and techniques. These may create technical obstacles in addition to social, cultural, and economic non-technical obstacles. Despite these obstacles, opportunities exist for skilled, knowledgeable professions to create cost-efficient solutions for energy efficiency in buildings.[17]

Buildings designed for good energy efficiency do not always live up to the design goals; various reasons lead to this performance gap.

Technology edit

Low-energy building design is considered important to encourage resource efficiency and reduce global climate change associated with the burning of fossil fuels. Design involves two general strategies: minimizing the need for energy use in buildings (especially for heating and cooling) through energy-efficient measures (EEMs) and adopting renewable energy and other technologies (RETs) to meet remaining energy needs. EEMs include building envelopes, internal conditions, and building-services systems; RETs include photovoltaic or building-integrated photovoltaic, wind turbines, solar thermal (solar water heaters), heat pumps, and district heating and cooling. Impacts include life-cycle costs, environmental impacts, and climate-change and social-policy issues.[29] The best low-energy designs offer occupants a better environment and more stable, controlled thermal comfort in addition to reduced energy costs.

GHG emissions associated with buildings construction are mainly coming from:

  1. Materials manufacturing (e.g., concrete)
  2. Materials transport
  3. Demolition wastes transport
  4. Demolition wastes treatment

The construction, renovation, and deconstruction of a typical building is on average responsible for the emissions of 1,000–1,500 kg CO2e/m2 (around 500 kg CO2e/m2 for construction only).

Strategies adopted by low-carbon buildings to reduce GHG emissions during construction include:

  1. Reduce quantity of materials used
  2. Select materials with low emissions factors associated (e.g., recycled materials)
  3. Select materials suppliers as close as possible to the construction.
  4. Divert demolition wastes to recycling instead of landfills or incineration

Energy efficiency edit

Reduction of energy consumption is more environmentally and financially advantageous than increasing onsite production to reach a low-energy goal. The less a home consumes, the smaller renewable-energy system it requires to reach net zero. Energy efficiency should always be the primary design strategy of a low-energy house.[1]

Improvements edit

Passive solar design and landscaping edit

Passive solar building design and energy-efficient landscaping support the low-energy house in conservation and can integrate it into a neighborhood and environment. Following passive solar building techniques, where buildings are compact in shape to reduce surface area and principal windows oriented towards the equator (south in the Northern Hemisphere and north in the Southern Hemisphere) maximizes passive solar gain. However, solar gain (especially in temperate climates) is secondary to minimizing the overall house-energy requirements. In hot temperatures, excess heat can create uncomfortable indoor conditions. Passive alternatives to air-conditioning systems, such as temperature-dependent venting, have been shown to be effective in regions with cooling needs.[30] Other techniques to reduce excess solar heat include brise-soleils, trees, attached pergolas with vines, vertical gardens, and green roofs.

Although low-energy houses can be constructed from dense or lightweight materials, internal thermal mass is normally incorporated to reduce summer peak temperatures, maintain stable winter temperatures, and prevent possible overheating in spring or autumn before the higher sun angle "shades" midday wall exposure and window penetration. Exterior wall color (when the surface allows choice) reflection or absorption depends on the predominant year-round outdoor temperature. The use of deciduous trees and wall trellised (or self-attaching) vines can assist in temperate climates.

Lighting and electrical appliances edit

To minimize total primary energy consumption, passive and active daylighting are the first daytime solutions to employ. For low-light days, non-daylight spaces and nighttime, sustainable lighting design with low-energy sources (such as standard-voltage compact fluorescent lamps and solid-state lighting with LED lamps, OLEDs and polymer light-emitting diodes and low-voltage incandescent light bulbs, compact metal halide, xenon and halogen lamps) can be used.

Solar-powered exterior security and landscape lighting, with solar cells on each fixture or connecting to a central solar panel, are available for gardens and outdoor needs. Low-voltage systems can be used for more controlled (or independent) illumination, using less electricity than conventional fixtures and lamps. Timers, motion detection and daylighting operation sensors further reduce energy consumption and light pollution.

Home appliances meeting independent energy-efficiency testing and receiving Ecolabel certification marks for reduced electrical and natural-gas consumption and product-manufacturing carbon emission labels are preferred for low-energy houses. Energy Star and EKOenergy are other certification marks.

See also edit

References edit

  1. ^ a b c Thomas, Walter D.; Duffy, John J. (2013-12-01). "Energy performance of net-zero and near net-zero energy homes in New England". Energy and Buildings. 67: 551–558. doi:10.1016/j.enbuild.2013.08.047. ISSN 0378-7788.
  2. ^ Weißenberger, Markus; Jensch, Werner; Lang, Werner (2014-06-01). "The convergence of life cycle assessment and nearly zero-energy buildings: The case of Germany". Energy and Buildings. 76: 551–557. doi:10.1016/j.enbuild.2014.03.028. ISSN 0378-7788.
  3. ^ "International Passive House Association | Criteria". passivehouse-international.org. Retrieved 2019-04-07.
  4. ^ U.S. EPA. 2008. Inventory of U.S. Greenhouse Gases Emissions and Sinks: 1990-2006, p. ES8.
  5. ^ IPCC. 2007. Climate Change 2007 Synthesis Report, p. 59.
  6. ^ "European Embedding of Passive Houses" (PDF). pibp.pl. Retrieved 2018-12-10.
  7. ^ Huck, Nichole (2015-08-05). "'Passive home' movement a success in Germany, but not in Saskatchewan where it started". CBC News. from the original on 2017-01-02. Retrieved 2023-10-08.
  8. ^ Orr, Harold (2020-10-05). "The principal designer of the house that inspired the global Passivhaus movement reflects on the project that started it all". EcoHome. Retrieved 2023-10-08.
  9. ^ Procter, Don (2017-11-29). "Passive house on the prairie, the Saskatchewan Conservation House". Journal of Commerce. Retrieved 2023-10-08.
  10. ^ Holladay, Martin (2009-08-14). "The History of the Chainsaw Retrofit". Green Building Advisor. from the original on 2018-10-16. Retrieved 2023-10-08.
  11. ^ Henry, Mike (2013-08-09). "Harold Orr's Superinsulated Retrofits". The Sustainable Home. from the original on 2017-03-11. Retrieved 2023-10-08.
  12. ^ "Basiswissen Bauphysik" (PDF). newbooks-services.de. Retrieved 2018-12-10.
  13. ^ Panagiotidou, Maria; Fuller, Robert J. (2013-11-01). "Progress in ZEBs—A review of definitions, policies and construction activity". Energy Policy. 62: 196–206. doi:10.1016/j.enpol.2013.06.099. ISSN 0301-4215.
  14. ^ "32010L0031 - Richtlinie (EU) 31/2010". jurion.de. Retrieved 2018-12-10.
  15. ^ "2010 to 2015 government policy: energy efficiency in buildings". GOV.UK. Retrieved 2018-12-10.
  16. ^ "Conservation of fuel and power: Approved Document L". GOV.UK. Retrieved 2018-12-10.
  17. ^ a b Pitts, Adrian (February 2017). "Passive House and Low Energy Buildings: Barriers and Opportunities for Future Development within UK Practice". Sustainability. 9 (2): 272. doi:10.3390/su9020272.
  18. ^ a b "Low-energy buildings in Europe – standards, criteria and consequences". lup.lub.lu.se. Retrieved 2018-12-10.
  19. ^ Raad Z. Homod, (2014) 'Assessment regarding energy saving and decoupling for different AHU (air handling unit) and control strategies in the hot-humid climatic region of Iraq' Energy, 74 (2014) 762-774
  20. ^ Linden, Belinda (February 2011). "Resuscitation guidelines: 2010 updateResuscitation Council UK, (2010) Resuscitation Guidelines 2010 October. http://www.resus.org.uk/ pages/guide.htm (accessed 14 January 2011)". British Journal of Cardiac Nursing. 6 (2): 84–86. doi:10.12968/bjca.2011.6.2.84. ISSN 1749-6403. {{cite journal}}: External link in |title= (help)
  21. ^ "Minergie Schweiz". Retrieved 2018-12-10.
  22. ^ Cole, Raymond J.; Fedoruk, Laura (2015). "Shifting from net-zero to net-positive energy buildings". Building Research & Information. 43: 111–120. doi:10.1080/09613218.2014.950452. S2CID 108636555.
  23. ^ "Features of ENERGY STAR Qualified New Homes." - EnergyStar.gov, Retrieved 7 March 2008.
  24. ^ "About Builders Challenge." 2011-09-03 at the Wayback Machine - March 2008. Energy Efficiency and Renewable Energy, U.S. Department of Energy. Retrieved 7 March 2008.
  25. ^ "Net Zero Home Labelling Program". Retrieved May 18, 2019.
  26. ^ "About Our Programs". Built Green Canada. Retrieved May 18, 2019.
  27. ^ "Energy Star Certified Homes". Natural Resources Canada. 2011-03-15. Retrieved May 18, 2019.
  28. ^ "Canadian Passive House Institute". Retrieved May 18, 2019.
  29. ^ Li, Danny H.W.; Yang, Liu; Lam, Joseph C. (2013-06-01). "Zero energy buildings and sustainable development implications – A review". Energy. 54: 1–10. doi:10.1016/j.energy.2013.01.070. ISSN 0360-5442.
  30. ^ Reda, F., Tuominen, P., Hedman, Å., Ibrahim, M.G.E.: "Low-energy residential buildings in New Borg El Arab: Simulation and survey based energy assessment". Energy and Buildings, Volume 93, 15 April 2015, pp. 65-82.

Further reading edit

External links edit

  • bigEE - Your guide to energy efficiency in buildings
  • IEA research program "Net Zero Energy Solar Buildings"
  • IEA Energy Conservation in Buildings and Community Systems Programme.
  • Common Fire Foundation overview of green building and information on the net-zero-energy Greenest Building in the Eastern US

Examples edit

  • World Map of international known Net Zero Energy Buildings
  • Building of low energy houses with Insulating Concrete Forms

energy, house, energy, house, characterized, energy, efficient, design, technical, features, which, enable, provide, high, living, standards, comfort, with, energy, consumption, carbon, emissions, traditional, heating, active, cooling, systems, absent, their, . A low energy house is characterized by an energy efficient design and technical features which enable it to provide high living standards and comfort with low energy consumption and carbon emissions Traditional heating and active cooling systems are absent or their use is secondary 1 2 Low energy buildings may be viewed as examples of sustainable architecture Low energy houses often have active and passive solar building design and components which reduce the house s energy consumption and minimally impact the resident s lifestyle Throughout the world companies and non profit organizations provide guidelines and issue certifications to guarantee the energy performance of buildings and their processes and materials Certifications include passive house BBC Batiment Basse Consommation Effinergie France zero carbon house UK and Minergie Switzerland 3 A thermogram compares the heat radiation of the windows and walls of two buildings a sustainable low energy passive house right and a conventional houseBuildings alone were responsible for 38 of all human Greenhouse gas emissions GHG as of 2008 with 20 attributed to residential buildings and 18 to commercial buildings 4 According to the Intergovernmental Panel on Climate Change IPCC buildings is the sector which presents the most cost effective opportunities for GHG reductions 5 Contents 1 Background 1 1 Canada 1 2 Germany 1 3 United Kingdom 1 4 United States 2 Types 3 National standards 3 1 Europe 3 1 1 Norway 3 1 2 Denmark 3 1 3 Germany 3 1 4 Switzerland 3 2 North America 4 Obstacles and opportunities 5 Technology 5 1 Energy efficiency 5 2 Improvements 5 3 Passive solar design and landscaping 5 4 Lighting and electrical appliances 6 See also 7 References 8 Further reading 9 External links 9 1 ExamplesBackground editDuring the 1970s research on low energy buildings was done in Denmark Sweden Germany Canada and the United States The implementation of standardized low energy building concepts has developed differently in each country 6 Canada edit In the late 1970s the province of Saskatchewan contracted the Saskatchewan Research Council to design and build a passive solar house suitable for the extreme climate of the Canadian prairies where winter temperatures can drop to negative 40 degrees Celsius 40 F 7 The project resulted in the construction of the Saskatchewan Conservation House in Regina in 1977 by a team led by engineer Harold Orr 8 The project developed a heat recovery air exchanger HRV hot water recovery and a blower door apparatus to measure building air tightness techniques that became common in low energy building in other parts of the world 9 Orr would go on to apply many of those techniques to retro fitting existing buildings to improve energy efficiency 10 11 Germany edit Triggered in the 1970s by the first energy crisis and growing environmental awareness energy conservation became increasingly important in Germany 12 In 1977 the country s first energy related building standard was enacted The German Passivhaus Institute introduced the first certified passive house in 1990 The annual heating requirement was introduced as an important parameter by the third German Thermal Insulation Ordinance 1995 In 2013 however there was no clear legal requirement for a low energy building standard in Germany According to Maria Panagiotidou and Robert J Fuller definitions policies and construction activity of zero energy buildings must be clear 13 The European Union s Energy Performance Directive requires that beginning in 2021 only low energy buildings may be built 14 United Kingdom edit Changes to national policies have occurred since May 2015 in the UK One of the most significant has been the withdrawal of the Code for Sustainable Homes CfSH as a system for assessing and encouraging improvements in the environmental design of dwellings 15 This has abandoned the code s schematic which provided a framework of achievement levels and to which low energy designers could aspire to meet or surpass Although energy conservation legislation still exists in the building regulations 16 there is a lack of suitable standards exceeding basic regulations As a result the Passive House Standard may expand its influence and impact on energy efficient houses 17 United States edit Interest in low energy buildings has increased in the United States primarily due to rising energy prices decreasing costs for onsite renewable energy systems and increasing concern about climate change California requires all new residential construction to be zero net energy by 2020 1 Types editLow energy houses are broadly defined but are generally known as houses with a lower energy demand than common buildings regulated by the national building code The term low energy house is used in some countries for a specific type of building 18 A low energy house is a guideline rarely specified in actual values heat load or space heating minimum A passive house is a standard with specific recommendations to save heating energy At one end of the spectrum are buildings with an ultra low space heating requirement which require low levels of imported energy even in winter approaching an autonomous building At the opposite end are buildings where few attempts are made to reduce their space heating requirement and which use high levels of imported energy in winter Although this may be balanced by high levels of renewable energy generation throughout the year it imposes greater demands on the national energy infrastructure during winter National standards editThe term low energy houses may refer to national building standards 19 These standards sometimes seek to limit the energy used for space heating which is the largest energy consumer in many climate zones Other energy uses may also be regulated The history of passive solar building design provides an international view of one form of low energy building development and standards Europe edit Standards for low energy buildings in Europe have proceeded differently in each country and there is no common certification or legislation for low energy buildings valid in all EU member states As a movement towards reducing energy use and emissions a common legislation concerning buildings energy performance the Energy Performance of Buildings Directive EPBD was published in 2002 and became effective in January 2003 20 Norway edit In NS 3700 the draft official standard low energy buildings are defined About the buildings energy performance two alternatives for rating their primary energy use are under discussion A limit on a building s annual CO2 emissions calculated by multiplying the annual supplied energy by a CO2 factor A percentage of its heating demand must be met with renewable energy Denmark edit Low energy houses are defined in the National Building Regulation Building Regulations 08 and are divided into two classes They are regulated in the regulations chapter 7 2 4 Low energy Germany edit Low energy houses certified by RAL GZ 965 have 30 percent less heat losses than regulated in the EnEV a national building code Other criteria affect insulation air tightness and ventilation Low energy buildings may be certified by RAL GZ 965 for planning or construction 18 Switzerland edit Low energy buildings may receive the Minergie certification a quality label for new and refurbished buildings The Minergie standard requires that buildings do not exceed 75 percent of average building energy consumption and fossil fuel consumption must not exceed 50 percent of the average 21 North America edit The European Union directive has clarified low energy houses in Europe and a large portion of the discussions on zero energy building in North America derives from the U S National Renewable Energy Laboratory NREL 22 The Energy Star program is the largest certifier of low energy homes and consumer products in the U S Although certified Energy Star homes use at least 15 percent less energy than standard new homes built in accordance with the International Residential Code they typically achieve a 20 to 30 percent savings 23 The United States Department of Energy introduced a program in 2008 to distribute zero energy housing across the country 24 Canadian builders may use a range of standards labels and certification programs to demonstrate a high level of energy performance in a given project These include Net Zero Home and Net Zero Ready Home certifications administered by the Canadian Home Builders Association 25 Built Green labels administered by Built Green Canada 26 Energy Star for Homes administered by Natural Resources Canada 27 The Canadian Passive House standard administered by the Canadian Passive House Institute 28 In British Columbia the above programs align with the BC Energy Step Code a provincial regulation to incentivize or require a level of energy efficiency in new construction beyond the base building code The code was designed as a technical road map to help the province reach its target of all new net zero energy ready buildings by 2032 Obstacles and opportunities editEnergy efficient design often relies on new technologies and techniques These may create technical obstacles in addition to social cultural and economic non technical obstacles Despite these obstacles opportunities exist for skilled knowledgeable professions to create cost efficient solutions for energy efficiency in buildings 17 Buildings designed for good energy efficiency do not always live up to the design goals various reasons lead to this performance gap Technology editMain article List of low energy building techniques Low energy building design is considered important to encourage resource efficiency and reduce global climate change associated with the burning of fossil fuels Design involves two general strategies minimizing the need for energy use in buildings especially for heating and cooling through energy efficient measures EEMs and adopting renewable energy and other technologies RETs to meet remaining energy needs EEMs include building envelopes internal conditions and building services systems RETs include photovoltaic or building integrated photovoltaic wind turbines solar thermal solar water heaters heat pumps and district heating and cooling Impacts include life cycle costs environmental impacts and climate change and social policy issues 29 The best low energy designs offer occupants a better environment and more stable controlled thermal comfort in addition to reduced energy costs GHG emissions associated with buildings construction are mainly coming from Materials manufacturing e g concrete Materials transport Demolition wastes transport Demolition wastes treatmentThe construction renovation and deconstruction of a typical building is on average responsible for the emissions of 1 000 1 500 kg CO2e m2 around 500 kg CO2e m2 for construction only Strategies adopted by low carbon buildings to reduce GHG emissions during construction include Reduce quantity of materials used Select materials with low emissions factors associated e g recycled materials Select materials suppliers as close as possible to the construction Divert demolition wastes to recycling instead of landfills or incinerationEnergy efficiency edit Reduction of energy consumption is more environmentally and financially advantageous than increasing onsite production to reach a low energy goal The less a home consumes the smaller renewable energy system it requires to reach net zero Energy efficiency should always be the primary design strategy of a low energy house 1 Improvements edit Absorption refrigerator Annualized geo solar Earth cooling tubes Geothermal heat pump Heat recovery ventilation Water heat recycling Passive cooling Renewable heat Seasonal thermal energy storage STES Solar air conditioning Solar hot water Solar devices Passive solar design and landscaping edit See also Sustainable landscaping Sustainable landscape architecture Sustainable gardening Rainwater harvesting and Water conservation Passive solar building design and energy efficient landscaping support the low energy house in conservation and can integrate it into a neighborhood and environment Following passive solar building techniques where buildings are compact in shape to reduce surface area and principal windows oriented towards the equator south in the Northern Hemisphere and north in the Southern Hemisphere maximizes passive solar gain However solar gain especially in temperate climates is secondary to minimizing the overall house energy requirements In hot temperatures excess heat can create uncomfortable indoor conditions Passive alternatives to air conditioning systems such as temperature dependent venting have been shown to be effective in regions with cooling needs 30 Other techniques to reduce excess solar heat include brise soleils trees attached pergolas with vines vertical gardens and green roofs Although low energy houses can be constructed from dense or lightweight materials internal thermal mass is normally incorporated to reduce summer peak temperatures maintain stable winter temperatures and prevent possible overheating in spring or autumn before the higher sun angle shades midday wall exposure and window penetration Exterior wall color when the surface allows choice reflection or absorption depends on the predominant year round outdoor temperature The use of deciduous trees and wall trellised or self attaching vines can assist in temperate climates Lighting and electrical appliances edit See also the categories Energy saving lighting Lighting Windows Energy conservation and Sustainable energy To minimize total primary energy consumption passive and active daylighting are the first daytime solutions to employ For low light days non daylight spaces and nighttime sustainable lighting design with low energy sources such as standard voltage compact fluorescent lamps and solid state lighting with LED lamps OLEDs and polymer light emitting diodes and low voltage incandescent light bulbs compact metal halide xenon and halogen lamps can be used Solar powered exterior security and landscape lighting with solar cells on each fixture or connecting to a central solar panel are available for gardens and outdoor needs Low voltage systems can be used for more controlled or independent illumination using less electricity than conventional fixtures and lamps Timers motion detection and daylighting operation sensors further reduce energy consumption and light pollution Home appliances meeting independent energy efficiency testing and receiving Ecolabel certification marks for reduced electrical and natural gas consumption and product manufacturing carbon emission labels are preferred for low energy houses Energy Star and EKOenergy are other certification marks See also edit nbsp Energy portalBuildings Zero energy building Self sufficient homes PlusEnergy buildings Energy plus buildings Green building Energy audit YakhchalAir and temperature Renewable heat Solar thermal collector Solar air heat Solar air conditioning Thermal conductivity Superinsulation Quadruple glazingSolar Passive solar building design History of passive solar building design Energy saving lighting Solar access List of pioneering solar buildingsSustainability Sustainability Sustainable energy Green building Sustainable refurbishmentEnergy rating standards House Energy Rating Australia Home energy rating United States EnerGuide Canada National Home Energy Rating United Kingdom LEED Leadership in Energy and Environmental Design Carbon emission label Low carbon economyReferences edit a b c Thomas Walter D Duffy John J 2013 12 01 Energy performance of net zero and near net zero energy homes in New England Energy and Buildings 67 551 558 doi 10 1016 j enbuild 2013 08 047 ISSN 0378 7788 Weissenberger Markus Jensch Werner Lang Werner 2014 06 01 The convergence of life cycle assessment and nearly zero energy buildings The case of Germany Energy and Buildings 76 551 557 doi 10 1016 j enbuild 2014 03 028 ISSN 0378 7788 International Passive House Association Criteria passivehouse international org Retrieved 2019 04 07 U S EPA 2008 Inventory of U S Greenhouse Gases Emissions and Sinks 1990 2006 p ES8 IPCC 2007 Climate Change 2007 Synthesis Report p 59 European Embedding of Passive Houses PDF pibp pl Retrieved 2018 12 10 Huck Nichole 2015 08 05 Passive home movement a success in Germany but not in Saskatchewan where it started CBC News Archived from the original on 2017 01 02 Retrieved 2023 10 08 Orr Harold 2020 10 05 The principal designer of the house that inspired the global Passivhaus movement reflects on the project that started it all EcoHome Retrieved 2023 10 08 Procter Don 2017 11 29 Passive house on the prairie the Saskatchewan Conservation House Journal of Commerce Retrieved 2023 10 08 Holladay Martin 2009 08 14 The History of the Chainsaw Retrofit Green Building Advisor Archived from the original on 2018 10 16 Retrieved 2023 10 08 Henry Mike 2013 08 09 Harold Orr s Superinsulated Retrofits The Sustainable Home Archived from the original on 2017 03 11 Retrieved 2023 10 08 Basiswissen Bauphysik PDF newbooks services de Retrieved 2018 12 10 Panagiotidou Maria Fuller Robert J 2013 11 01 Progress in ZEBs A review of definitions policies and construction activity Energy Policy 62 196 206 doi 10 1016 j enpol 2013 06 099 ISSN 0301 4215 32010L0031 Richtlinie EU 31 2010 jurion de Retrieved 2018 12 10 2010 to 2015 government policy energy efficiency in buildings GOV UK Retrieved 2018 12 10 Conservation of fuel and power Approved Document L GOV UK Retrieved 2018 12 10 a b Pitts Adrian February 2017 Passive House and Low Energy Buildings Barriers and Opportunities for Future Development within UK Practice Sustainability 9 2 272 doi 10 3390 su9020272 a b Low energy buildings in Europe standards criteria and consequences lup lub lu se Retrieved 2018 12 10 Raad Z Homod 2014 Assessment regarding energy saving and decoupling for different AHU air handling unit and control strategies in the hot humid climatic region of Iraq Energy 74 2014 762 774 Linden Belinda February 2011 Resuscitation guidelines 2010 updateResuscitation Council UK 2010 Resuscitation Guidelines 2010 October http www resus org uk pages guide htm accessed 14 January 2011 British Journal of Cardiac Nursing 6 2 84 86 doi 10 12968 bjca 2011 6 2 84 ISSN 1749 6403 a href Template Cite journal html title Template Cite journal cite journal a External link in code class cs1 code title code help Minergie Schweiz Retrieved 2018 12 10 Cole Raymond J Fedoruk Laura 2015 Shifting from net zero to net positive energy buildings Building Research amp Information 43 111 120 doi 10 1080 09613218 2014 950452 S2CID 108636555 Features of ENERGY STAR Qualified New Homes EnergyStar gov Retrieved 7 March 2008 About Builders Challenge Archived 2011 09 03 at the Wayback Machine March 2008 Energy Efficiency and Renewable Energy U S Department of Energy Retrieved 7 March 2008 Net Zero Home Labelling Program Retrieved May 18 2019 About Our Programs Built Green Canada Retrieved May 18 2019 Energy Star Certified Homes Natural Resources Canada 2011 03 15 Retrieved May 18 2019 Canadian Passive House Institute Retrieved May 18 2019 Li Danny H W Yang Liu Lam Joseph C 2013 06 01 Zero energy buildings and sustainable development implications A review Energy 54 1 10 doi 10 1016 j energy 2013 01 070 ISSN 0360 5442 Reda F Tuominen P Hedman A Ibrahim M G E Low energy residential buildings in New Borg El Arab Simulation and survey based energy assessment Energy and Buildings Volume 93 15 April 2015 pp 65 82 Further reading editVoss Karsten and Musall Eike Net zero energy buildings International projects of carbon neutrality in buildings 2nd edition November 2012 Institut fur internationale Architektur Dokumentation GmbH amp Co KG Munchen ISBN 978 3 920034 80 5 Raad Z Homod Intelligent HVAC Control for High Energy Efficiency in Buildings Lambert Academic Publishing 2014 ISBN 978 3 8473 0625 2 External links editbigEE Your guide to energy efficiency in buildings IEA research program Net Zero Energy Solar Buildings IEA Energy Conservation in Buildings and Community Systems Programme Common Fire Foundation overview of green building and information on the net zero energy Greenest Building in the Eastern US Article on Low Energy HousingExamples edit World Map of international known Net Zero Energy Buildings Building of low energy houses with Insulating Concrete Forms Retrieved from https en wikipedia org w index php title Low energy house amp oldid 1210942138, wikipedia, wiki, book, books, library,

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