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
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
