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Title: Comparative Study of Vented vs. Unvented Crawlspaces

Abstract

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 inmore » the mixed humid climate.« less

Authors:
 [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Building Technologies Research and Integration Center (BTRIC)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1029224
Report Number(s):
ORNL/TM-2011/438
BT0101000; RABT002; TRN: US201201%%92
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; BUILDINGS; CAVITIES; CLIMATES; CONSTRUCTION; DESIGN; ENERGY EFFICIENCY; FIBERGLASS; FLOORS; HEAT FLUX; HUMIDITY; PERFORMANCE; SENSORS; crawlspace; traditional vented; sealed and insulated; mold growth

Citation Formats

Biswas, Kaushik, Christian, Jeffrey E, and Gehl, Anthony C. Comparative Study of Vented vs. Unvented Crawlspaces. United States: N. p., 2011. Web. doi:10.2172/1029224.
Biswas, Kaushik, Christian, Jeffrey E, & Gehl, Anthony C. Comparative Study of Vented vs. Unvented Crawlspaces. United States. https://doi.org/10.2172/1029224
Biswas, Kaushik, Christian, Jeffrey E, and Gehl, Anthony C. 2011. "Comparative Study of Vented vs. Unvented Crawlspaces". United States. https://doi.org/10.2172/1029224. https://www.osti.gov/servlets/purl/1029224.
@article{osti_1029224,
title = {Comparative Study of Vented vs. Unvented Crawlspaces},
author = {Biswas, Kaushik and Christian, Jeffrey E and Gehl, Anthony C},
abstractNote = {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.},
doi = {10.2172/1029224},
url = {https://www.osti.gov/biblio/1029224}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Oct 01 00:00:00 EDT 2011},
month = {Sat Oct 01 00:00:00 EDT 2011}
}