Engineered Systems - October 2008 - (Page 81)

Glossary Here are some common abbreviations and terms found in the pages of Engineered Systems. A A/C – air conditioning ach – air changes per hour AE – architectural and engineering; or architect and engineer AFD – adjustable-frequency drive AHJ – authority having jurisdiction AHU– air-handling unit ASD – adjustable-speed drive ASHRAE – American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. ATC – automatic temperature control E EMS – energy management system EPA – U.S. Environmental Protection Agency ERV – energy recovery ventilator P PFPT – prefunctional performance test PM – preventive maintenance PID – proportional, integral, derivative F fpm – feet per minute FPT – functional performance test R rh – relative humidity RFP – request for proposal RFS – request for submittal ROI – return on investment RO – reverse osmosis RTD – resistance temperature detector G gpm – gallons per minute B BACnet – a data communication protocol for building automation and control networks BAS – building automation system bhp – boiler horsepower; also, brake horsepower BMS – building management system BofD – basis of design H HEPA – high-efficiency particulate air HTML – hypertext markup language HTTP – hypertext transfer protocol HWR – hot water return HWS – hot water supply S SA – supply air scfm – standard cubic feet per minute T TAB – testing and balancing TES – thermal energy storage I IAQ – indoor air quality IS – information systems IT – information technology C CAD – computer-aided design cfm – cubic feet per minute CHW – chilled water CMMS – computerized maintenance management system CO2– carbon dioxide COP – coefficient of performance CRAC – computer room air conditioner U UL – Underwriter's Laboratory USGBC – U.S. Green Building Council UV – ultraviolet L LAN – local area network LEED® – Leadership in Energy and Environmental Design, a designation by the U.S. Green Building Council LEED® AP – LEED Accredited Professional V VAV – variable-air volume VFD – variable-frequency drive VOIP – voice-over Internet protocol VSD – variable-speed drive D D-B – design-build db – drybulb DDC – direct digital controls DID – design intent document DOAS – dedicated outdoor air system DOE – U.S. Department of Energy DR – demand response DX – direct expansion M MEC – mechanical, electrical, communication MEP – mechanical, electrical, plumbing MERV – minimum efficiency rating value X XML – extensible markup language O O&M – operations and maintenance oBIX – Open Building Information Exchange OEM – original equipment manufacturer OA – outside air OPR – owner’s project requirements W WAN – wide area network wb – wetbulb wc – water column wg – water gauge Take the HVAC CHALLENGE ™ September solution from page 16. Health Care Facilities Searchable products Company listings Live Web & e-mail Links Product photos and video Downloadable product spec sheets Search by product category or company name w w w. esmag a zine . c o m 81 http://www.ESmagazine.com/sourcebook http://www.esmagazine.com

Table of Contents Feed for the Digital Edition of Engineered Systems - October 2008

Engineered Systems - October 2008 Contents Editor’s Note Letters Back2Basics HVAC Challenge Case in Point Commissioning Building Automation HydroTech HVACR Designer Tips Special Insert: Engineer's Technical Library Fall 2008 Living Wild! Chilled Beams in Chicago Phoenix Convention Center: On The Rise Cold-Climate HVAC Challenges Humidification Strategies For Data Centers & Network Rooms Special Advertising Supplement: Tabb Talk Computers & Software Issues & Events Products Literature & Catalogs Glossary Classifieds Advertiser Index Tomorrow’s Environment

Engineered Systems - October 2008

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