As an addendum to my previous note, the air exchanges for labs is generally in the range of 10 to 15 exchanges/hour. When a room is full of hoods, that exchange rate might rise to as much as 20 exchanges/hour or more. That is another reason that lab and office mixed systems do not really do well together. The office air would be affected greatly by the lab exhaust and the energy bill would be that much higher to maintain all of the spaces. Kenneth Smith, CIH Calif. Dept. Health Chief EH&S, Retired Richmond Laboratory Facility -----Original Message----- From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of Diane Amell Sent: Monday, October 08, 2007 1:11 PM To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU Subject: Re: [DCHAS-L] laboratory/office environmental control questions For "general office areas," federal OSHA recommends the use of ASHRAE 62.1-2004 Ventilation for Acceptable Indoor Air Quality. In Minnesota, we have a standard, MN Rules 5205.0110 Indoor Workroom Ventilation and Temperature, which deals with fresh air flow, heat stress, minimum temperatures and recirculated air. The standard, for those who are interested, can be found at http://www.revisor.leg.state.mn.us/bin/getpub.php?pubtype=RULE_CHAP_SEC&year =current§ion=5205.0110 - Diane Amell, MNOSHA >>> "Lazarski, Peter M."
10/8/2007 11:37 AM >>> NIST has a temperature reference for dimensional calibration http://ts.nist.gov/WeightsAndMeasures/Publications/gentechlength.cfm Also, the National Conference for Standardizing Laboratories has a publication, RP-7, for site selection and design of a metrology laboratory. Plagiarizing from "Guidelines for Laboratory Design", J. Wiley & Sons (1987), p.41, "The temperature in most laboratory buildings does not require close regulation, that is, no better than +/- 3 F." This book also refers to a draft ANSI-ASHRAE ventilation standard 86-62 (1986) which recommended air exchange rates for public, commercial and industrial areas. Local building codes were mentioned as sources. The CRC Handbook of Laboratory Safety, 5th edition has a large chapter titled Laboratory Facilities - Design and Equipment. I think there may be OSHA suggestions for temperatures of general office areas. The information contained in this e-mail message and any attachments may be confidential. It is intended only for the use of the individual or entities named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail at the originating address. Peter Lazarski National Grid USA Chemical Laboratory, Bldg. 1 7437 Henry Clay Blvd. Liverpool, NY 13088 (315)460-2114 -----Original Message----- From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of al.muehlhausen**At_Symbol_Here**CIBAVISION.COM Sent: Monday, October 08, 2007 9:43 AM To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU Subject: [DCHAS-L] laboratory/office environmental control questions I have been challenged by my engineering group to consider the following questions as they pertain to a mixed use office/laboratory building. Any input would be useful. What is the target (set point) temperature, by space type. What is the acceptable range of temperature, by space type. What is the response time requirements of the temperature controlling system What is the target (set point) humidity, by space type. What is the acceptable range of humidity, by space type. What is the response time requirements of the humidity controlling system What is the minimum number of room air changes per hour, by space type. What is the maximum number of room air changes per hour, by space type. What are the pressure level requirements between / relative to each space type. What is the response time requirements of the pressure controlling system. Kind regards, Al Muehlhausen CIBA Vision Corporation Chemist/Certified Industrial Hygienist Health, Safety, and Environmental Officer JCE/JCA/BTI Office 678-415-4217 Cell 678-644-7026 **** For your information: KeySpan is now part of National Grid.**** **************************************************************************** **** This e-mail and any files transmitted with it, are confidential to National Grid and are intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error, please reply to this message and let the sender know.
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