Guest guest Posted May 21, 2004 Report Share Posted May 21, 2004 Does anyone know of an economical way to test if a building has leakage to the building envelope.(the outside walls)This may be required to see if a building could sustain a wind blowing directly at it which contained a CBR agent. The HVAC system is turned off so there is no positive pressure due to possible ingress through the system. One system I thought of was using SF6 a decay trace gas, released in side and with AHUs and entrance doors sealed. Log how long before it leaks out, but the gas will decay anyway so pointless.May be a pointless excercise anyway because the wind pressure acting upon a building may be far greater than what could be developed inside? Another question is, are there clearance criteria for buildings decontaminated from cbr agents ? Thanks for any input Jeff Charlton in London Quote Link to comment Share on other sites More sharing options...
Guest guest Posted May 21, 2004 Report Share Posted May 21, 2004 Here is a resource that might help you, although it probably won't directly answer your question. It's from an article dealing with airtightness of building envelopes. Some interesting information about effectiveness (or lack of it) of poly vapor barriers under real-life conditions. http://www.fpl.fs.fed.us/documnts/pdf1998/tenwo98a.pdf Tim Toburen RE: Re: Building leakage > > > Does anyone know of an economical way to test if a building has leakage to > the building envelope.(the outside walls)This may be required to see if a > building could sustain a wind blowing directly at it which contained a CBR > agent. The HVAC system is turned off so there is no positive pressure due to > possible ingress through the system. > > One system I thought of was using SF6 a decay trace gas, released in side > and with AHUs and entrance doors sealed. Log how long before it leaks out, > but the gas will decay anyway so pointless.May be a pointless excercise > anyway because the wind pressure acting upon a building may be far greater > than what could be developed inside? > > Another question is, are there clearance criteria for buildings > decontaminated from cbr agents ? > > Thanks for any input > Jeff Charlton > in London > > > > > > > FAIR USE NOTICE: > > This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes. For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml. If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner. > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted May 21, 2004 Report Share Posted May 21, 2004 Jeff, What about mechanically pressurising or depressurising the building using the Minneappolis Blower door? They make air tightness testing equipment, and depending on building size, I am sure they could help you figure something out. http://www.energyconservatory.com/ If your contaminant is indoors and you are worried about migraation of it into the envelope, I would suspect the two driving natural forces would be stack effect and wind effect. Greg Labbe Green Saver Toronto RE: Re: Building leakage Does anyone know of an economical way to test if a building has leakage to the building envelope.(the outside walls)This may be required to see if a building could sustain a wind blowing directly at it which contained a CBR agent. The HVAC system is turned off so there is no positive pressure due to possible ingress through the system. One system I thought of was using SF6 a decay trace gas, released in side and with AHUs and entrance doors sealed. Log how long before it leaks out, but the gas will decay anyway so pointless.May be a pointless excercise anyway because the wind pressure acting upon a building may be far greater than what could be developed inside? Another question is, are there clearance criteria for buildings decontaminated from cbr agents ? Thanks for any input Jeff Charlton in London FAIR USE NOTICE: This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes. For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml. If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted May 21, 2004 Report Share Posted May 21, 2004 Tim, I'm impressed, very good document. I owe you a drink at some future convention. What's you poison? Mark R Stroup CGC, CMR, Pres. Five Star Hospitality Services, Inc. Orlando, FL Re: Re: Building leakage Here is a resource that might help you, although it probably won't directly answer your question. It's from an article dealing with airtightness of building envelopes. Some interesting information about effectiveness (or lack of it) of poly vapor barriers under real-life conditions. http://www.fpl.fs.fed.us/documnts/pdf1998/tenwo98a.pdf Tim Toburen RE: Re: Building leakage > > > Does anyone know of an economical way to test if a building has > leakage to the building envelope.(the outside walls)This may be > required to see if a building could sustain a wind blowing directly at > it which contained a CBR agent. The HVAC system is turned off so there > is no positive pressure due to > possible ingress through the system. > > One system I thought of was using SF6 a decay trace gas, released in > side and with AHUs and entrance doors sealed. Log how long before it > leaks out, but the gas will decay anyway so pointless.May be a > pointless excercise anyway because the wind pressure acting upon a > building may be far greater than what could be developed inside? > > Another question is, are there clearance criteria for buildings > decontaminated from cbr agents ? > > Thanks for any input > Jeff Charlton > in London > > > > > > > FAIR USE NOTICE: > > This site contains copyrighted material the use of which has not > always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes. For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml. If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner. > Quote Link to comment Share on other sites More sharing options...
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