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ES Glossary

Here are some common abbreviations and terms found in the pages of Engineered Systems.

A
A/CAir Conditioning
ACHAir Changes Per Hour
AEArchitectural and Engineering; or Architect and Engineer
AFDAdjustable-Frequency Drive
AHUAir-Handling Unit
ASDAdjustable-Speed Drive
ASHRAEAmerican Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
ATCAutomatic Temperature Control


B
BASBuilding Automation System
BHPBoiler Horsepower; also, Brake Horsepower
BMSBuilding Management System


C
CADComputer-Aided Design
CFMCubic Feet per Minute
CHWChilled Water
CMMSComputerized Maintenance Management System
CO2Carbon Dioxide
COPCoefficient Of Performance


D
D-BDesign-Build
DBDrybulb
DDCDirect Digital Controls
DOASDedicated Outdoor Air System
DOEU.S. Department of Energy
DXDirect Expansion


E
EMSEnergy Management System
EPAU.S. Environmental Protection Agency


F
FPMFeet Per Minute


G
GPMGallons Per Minute


H
HEPAHigh-Efficiency Particulate Air
HTMLHypertext Markup Language
HTTPHypertext Transfer Protocol
HWRHot Water Return
HWSHot Water Supply


I
IAQIndoor Air Quality
ISInformation Systems
ITInformation Technology


L
LEED™Leadership in Energy and Environmental Design, a designation by the U.S. Green Building Council


M
MECMechanical, Electrical, Communication
MEPMechanical, Electrical, Plumbing


O
O&MOperations and Maintenance
OAOutside Air
OEMOriginal Equipment Manufacturer


P
PIDProportional, Integral, Derivative
PMPreventive Maintenance
PPMParts Per Million


R
RFPRequest For Proposal
RFSRequest For Submittal
RHRelative Humidity
ROReverse Osmosis
ROIReturn On Investment
RTDResistance Temperature Detector


S
SCFMStandard Cubic Feet per Minute


T
TABTesting And Balancing
TESThermal Energy Storage


U
ULUnderwriter's Laboratory
UVUltraviolet


V
VAVVariable-Air Volume
VFDVariable-Frequency Drive
VSDVariable-Speed Drive


X
XMLExtensible Markup Language


W
WANWide Area Network
WBWetbulb
WCWater Column
WGWater Gauge







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