The purpose of this research was to conduct a pilot study of LEED certified homes in New England one to five years after occupancy to determine whether they continue to perform at the level predicted during the certif...The purpose of this research was to conduct a pilot study of LEED certified homes in New England one to five years after occupancy to determine whether they continue to perform at the level predicted during the certification process.Four criteria were defined to assess the performance of each home:(1)energy consumption for heating,cooling,lighting,electronics and appliances;(2)building envelope and air infiltration;(3)operations and maintenance;and(4)occupant satisfaction and indoor air quality.Both qualitative and quantitative methods including blower door and duct blaster tests,utility bill analysis,and an occupant satisfaction survey were used to measure the post-occupancy performance of seven LEED certified homes in New England.Discrepancies were found between the original building performance as determined at the time of certification and the current level of building performance.While this is limited,initial research,these findings indicate a need for further post-occupancy research that can provide feedback to green certification programs,allowing them to be modified as necessary to better reflect the actual environmental impacts of certified buildings.展开更多
It is quite difficult as to how to choose an appropriate home elevator, because the factories manufacturing home elevator are numerous and the models of production are different. Therefore, this article combines .fuzz...It is quite difficult as to how to choose an appropriate home elevator, because the factories manufacturing home elevator are numerous and the models of production are different. Therefore, this article combines .fuzzy math with extension theory on the basis of matter element theory, extension set theory and correlation function, constructs a classical matter element and a segmentfield matter element by classifying home elevator performance and making a performance index membership zero dimension, and establishes an extension fuzzy evaluation model of home elevator performance levels. The example in this article shows that the established method is able to evaluate actual home elevator performance.展开更多
In 2005,Martha Rose Construction Inc.(MRC)upgraded the specs in their Built Green Certified homes to include high performance and healthy home features.In 2007,MRC joined the Department of Energy’s Builders Challenge...In 2005,Martha Rose Construction Inc.(MRC)upgraded the specs in their Built Green Certified homes to include high performance and healthy home features.In 2007,MRC joined the Department of Energy’s Builders Challenge Program.Less than 1%of the market builders in the country work under this umbrella,which has a tag line“Research Towards Net Zero.”It charges its builders with striving to reach net zero while still being replicable and affordable.A recent name change better illustrates the goal:“DOE Zero Energy Ready Home.”With the help of the mechanical engineers that work with DOE on this program,Martha Rose Construction began trying different space and hot water heating combinations.The projects the company undertakes are small by development standards and they are custom designed for each site,even though they are sold on the speculative marketplace after completion.The goal was,and still is,to find the magic bullet for water and space heating that combines affordability with efficiency and practicality.When the calculated heat loads are extremely low due to super insulation,air sealing,and heat recovery ventilation(HRV),it no longer makes monetary sense to have a fancy heating system.The Building America engineers promote the KISS(keep it simple stupid)concept!In this article,we will look at the factors that led Martha Rose Construction to try different heating types and the level of builder and buyer satisfaction with each combination.Four projects’mechanical systems will be reviewed and we will end with what is likely the best recommendation going forward for a high performance home.The author is a builder in the Seattle marketplace,and has made a career in the construction industry for over 41 years.展开更多
基金supported by the National Institute of Food and Agriculture,U.S.Department of Agriculture,the Massachusetts Agricultural Experiment Station and the Department of Environmental Conservation under Project No.MAS00012.Publication no.3473Support was also provided by the University of Massachusetts Healey Endowment Grant.
文摘The purpose of this research was to conduct a pilot study of LEED certified homes in New England one to five years after occupancy to determine whether they continue to perform at the level predicted during the certification process.Four criteria were defined to assess the performance of each home:(1)energy consumption for heating,cooling,lighting,electronics and appliances;(2)building envelope and air infiltration;(3)operations and maintenance;and(4)occupant satisfaction and indoor air quality.Both qualitative and quantitative methods including blower door and duct blaster tests,utility bill analysis,and an occupant satisfaction survey were used to measure the post-occupancy performance of seven LEED certified homes in New England.Discrepancies were found between the original building performance as determined at the time of certification and the current level of building performance.While this is limited,initial research,these findings indicate a need for further post-occupancy research that can provide feedback to green certification programs,allowing them to be modified as necessary to better reflect the actual environmental impacts of certified buildings.
文摘It is quite difficult as to how to choose an appropriate home elevator, because the factories manufacturing home elevator are numerous and the models of production are different. Therefore, this article combines .fuzzy math with extension theory on the basis of matter element theory, extension set theory and correlation function, constructs a classical matter element and a segmentfield matter element by classifying home elevator performance and making a performance index membership zero dimension, and establishes an extension fuzzy evaluation model of home elevator performance levels. The example in this article shows that the established method is able to evaluate actual home elevator performance.
文摘In 2005,Martha Rose Construction Inc.(MRC)upgraded the specs in their Built Green Certified homes to include high performance and healthy home features.In 2007,MRC joined the Department of Energy’s Builders Challenge Program.Less than 1%of the market builders in the country work under this umbrella,which has a tag line“Research Towards Net Zero.”It charges its builders with striving to reach net zero while still being replicable and affordable.A recent name change better illustrates the goal:“DOE Zero Energy Ready Home.”With the help of the mechanical engineers that work with DOE on this program,Martha Rose Construction began trying different space and hot water heating combinations.The projects the company undertakes are small by development standards and they are custom designed for each site,even though they are sold on the speculative marketplace after completion.The goal was,and still is,to find the magic bullet for water and space heating that combines affordability with efficiency and practicality.When the calculated heat loads are extremely low due to super insulation,air sealing,and heat recovery ventilation(HRV),it no longer makes monetary sense to have a fancy heating system.The Building America engineers promote the KISS(keep it simple stupid)concept!In this article,we will look at the factors that led Martha Rose Construction to try different heating types and the level of builder and buyer satisfaction with each combination.Four projects’mechanical systems will be reviewed and we will end with what is likely the best recommendation going forward for a high performance home.The author is a builder in the Seattle marketplace,and has made a career in the construction industry for over 41 years.
