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Details

Rational for Measuring Duck Leakage Flows in Large Commercial Buildings.

DE2005843145

Publication Date	2005
Personal Author	Wray, C. P.; Diamond, R. C.; Sherman, M. H.
Page Count	10
Abstract	Industry-wide methods of assessing duct leakage are based on duct pressurization tests, and focus on 'high pressure' ducts. Even though 'low pressure' ducts can be a large fraction of the system and tend to be leaky, few guidelines or construction specifications require testing these ducts. We report here on the measured leakage flows from ten large commercial duct systems at operating conditions: three had low leakage (less than 5% of duct inlet flow), and seven had substantial leakage (9 to 26%). By comparing these flows with leakage flows estimated using the industry method, we show that the latter method by itself is not a reliable indicator of whole-system leakage flow, and that leakage flows need to be measured.
Keywords	Commercial buildings Ducts Leaks Measurements Leak testing
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Berkeley National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200607

Rational for Measuring Duck Leakage Flows in Large Commercial Buildings.

Rational for Measuring Duck Leakage Flows in Large Commercial Buildings.
DE2005843145

Publication Date	2005
Personal Author	Wray, C. P.; Diamond, R. C.; Sherman, M. H.
Page Count	10
Abstract	Industry-wide methods of assessing duct leakage are based on duct pressurization tests, and focus on 'high pressure' ducts. Even though 'low pressure' ducts can be a large fraction of the system and tend to be leaky, few guidelines or construction specifications require testing these ducts. We report here on the measured leakage flows from ten large commercial duct systems at operating conditions: three had low leakage (less than 5% of duct inlet flow), and seven had substantial leakage (9 to 26%). By comparing these flows with leakage flows estimated using the industry method, we show that the latter method by itself is not a reliable indicator of whole-system leakage flow, and that leakage flows need to be measured.
Keywords	Commercial buildings Ducts Leaks Measurements Leak testing
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Berkeley National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200607