Comparative Study of Vented vs. Unvented Crawlspaces

Biswas, Kaushik¹  Christian, Jeffrey E¹  Gehl, Anthony C¹ 

[1] ORNL

关键词: BUILDINGS;    CAVITIES;    CLIMATES;    CONSTRUCTION;    DESIGN;    ENERGY EFFICIENCY;    FIBERGLASS;    FLOORS;    HEAT FLUX;    HUMIDITY;    PERFORMANCE;    SENSORS crawlspace;    traditional vented;    sealed and insulated;    mold growth;   

DOI  :  10.2172/1029224
RP-ID  :  ORNL/TM-2011/438
PID  :  OSTI ID: 1029224
Others  :  Other: BT0101000
Others  :  RABT002
Others  :  TRN: US201201%%92

学科分类：能源（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

There has been a significant amount of research in the area of building energy efficiency and durability. However, well-documented quantitative information on the impact of crawlspaces on the performance of residential structures is lacking. The objective of this study was to evaluate and compare the effects of two crawlspace strategies on the whole-house performance of a pair of houses in a mixed humid climate. These houses were built with advanced envelope systems to provide energy savings of 50% or more compared to traditional 2010 new construction. One crawlspace contains insulated walls and is sealed and semi-conditioned. The other is a traditional vented crawlspace with insulation in the crawlspace ceiling. The vented (traditional) crawlspace contains fiberglass batts installed in the floor chase cavities above the crawl, while the sealed and insulated crawlspace contains foil-faced polyisocyanurate foam insulation on the interior side of the masonry walls. Various sensors to measure temperatures, heat flux through crawlspace walls and ceiling, and relative humidity were installed in the two crawlspaces. Data from these sensors have been analyzed to compare the performance of the two crawlspace designs. The analysis results indicated that the sealed and insulated crawlspace design is better than the traditional vented crawlspace in the mixed humid climate.