I'm not sure if this is the rule she was referring to, but on my other list, someone posted a copy of the ASHRAE 62-2004 letter of interpretation for acceptable cross leakage for energy recovery ventilation: "Summary: ASHRAE 62-2004 provides clear guidance and clarification to air stream recirculation issues and defines air classification categories. With respect to recovering energy from exhaust air, the amount of acceptable exhaust air cross leakage is now quantified based on the contaminant concentrations of the exhaust air." It does not specifically prohibit this technology for labs, but does say: "Class 4: Air with highly objectionable fumes or gases or potentially containing dangerous particles, bioaerosols, or gases at a concentration high enough to be considered harmful, not suitable for recirculation or transfer to any other space. Examples: paint spray booths, laboratory fume exhaust, kitchen grease exhaust." Kim Auletta Lab Safety Specialist EH&S Z=6200 Stony Brook University kauletta**At_Symbol_Here**notes.cc.sunysb.edu 631-632-3032 FAX: 631-632-9683 EH&S Web site: http://www.stonybrook.edu/ehs/lab/ Remember to wash your hands! From: ACTSNYC**At_Symbol_Here**CS.COM To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU Date: 06/22/2011 07:36 AM Subject: Re: [DCHAS-L] Heat Recovery Wheel help needed Sent by: DCHAS-L Discussion ListHmmmm. The 2007 (26th Edition) of the ACGIH manual said to "avoid" heat wheels. And the 2010 (27th Edition) included the even stronger prohibition I quoted in a previous post. So if there is some rule promulgated in 2011, I'd love to know about it. I find it hard to talk LEED-besotted architects out of the wheels and would love to have another reference. Monona In a message dated 6/21/2011 9:30:23 PM Eastern Daylight Time, baum.janet**At_Symbol_Here**GMAIL.COM writes: There is a new (January, 2011) restriction against using heat wheels to recover heat from exhaust generated by chemical hoods. I don't have the reference handy but will send it to you tomorrow. Janet Baum I'm not sure if this is the rule she was referring to, but on my other list, someone posted a copy of the ASHRAE 62-2004 letter of interpretation for acceptable cross leakage for energy recovery ventilation:
"Summary: ASHRAE 62-2004 provides clear guidance and clarification to air stream recirculation issues and defines air classification categories. With respect to recovering energy from exhaust air, the amount of acceptable exhaust air cross leakage is now quantified based on the contaminant concentrations of the exhaust air."
It does not specifically prohibit this technology for labs, but does say:
"Class 4: Air with highly objectionable fumes or gases or potentially containing dangerous particles, bioaerosols, or gases at a concentration high enough to be considered harmful, not suitable for recirculation or transfer to any other space.
Examples: paint spray booths, laboratory fume exhaust, kitchen grease exhaust."
Kim Auletta
Lab Safety Specialist
EH&S Z=6200
Stony Brook University
kauletta**At_Symbol_Here**notes.cc.sunysb.edu
631-632-3032
FAX: 631-632-9683
EH&S Web site: http://www.stonybrook.edu/ehs/lab/Remember to wash your hands!
From: ACTSNYC**At_Symbol_Here**CS.COM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Date: 06/22/2011 07:36 AM
Subject: Re: [DCHAS-L] Heat Recovery Wheel help needed
Sent by: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Hmmmm. The 2007 (26th Edition) of the ACGIH manual said to "avoid" heat wheels. And the 2010 (27th Edition) included the even stronger prohibition I quoted in a previous post. So if there is some rule promulgated in 2011, I'd love to know about it. I find it hard to talk LEED-besotted architects out of the wheels and would love to have another reference.Monona
In a message dated 6/21/2011 9:30:23 PM Eastern Daylight Time, baum.janet**At_Symbol_Here**GMAIL.COM writes:There is a new (January, 2011) restriction against using heat wheels to recover heat from exhaust generated by chemical hoods. I don't have the reference handy but will send it to you tomorrow.
Janet Baum
Previous post | Top of Page | Next post