ES 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
AHU Air-Handling Unit
ASD Adjustable-Speed Drive
ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
ATC Automatic Temperature Control
B
BAS  Building Automation System
BHP Boiler Horsepower; also, Brake Horsepower
BMS Building Management System
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
D
D-B  Design-Build
DB  Drybulb
DDC  Direct Digital Controls
DOAS  Dedicated Outdoor Air System
DOE  U.S. Department of Energy
DX  Direct Expansion 
E
EMS Energy Management System
EPA U.S. Environmental Protection Agency
F
FPM  Feet Per Minute
G
GPM  Gallons Per Minute
H
HEPA  High-Efficiency Particulate Air
HTML  Hypertext Markup Language
HTTP  Hypertext Transfer Protocol
HWR  Hot Water Return
HWS  Hot Water Supply
I
IAQ  Indoor Air Quality
IS  Information Systems
IT  Information Technology
L
LEED™  Leadership in Energy and Environmental Design, a designation by the U.S. Green Building Council
M
MEC  Mechanical, Electrical, Communication
MEP  Mechanical, Electrical, Plumbing
O
O&M  Operations and Maintenance
OA  Outside Air
OEM  Original Equipment Manufacturer
P
PID  Proportional, Integral, Derivative
PM  Preventive Maintenance
PPM  Parts Per Million
R
RFP  Request For Proposal
RFS  Request For Submittal
RH  Relative Humidity
RO  Reverse Osmosis
ROI  Return On Investment
RTD  Resistance Temperature Detector
S
SCFM  Standard Cubic Feet per Minute
T
TAB  Testing And Balancing
TES  Thermal Energy Storage
U
UL  Underwriter's Laboratory
UV  Ultraviolet
V
VAV  Variable-Air Volume
VFD  Variable-Frequency Drive
VSD  Variable-Speed Drive
X
XML  Extensible Markup Language
W
WAN  Wide Area Network
WB  Wetbulb
WC  Water Column
WG  Water Gauge

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ES Gallery: Snapshots & Systems

Check out highlights from projects featured in our magazine this year!
9/25/14 2:00 pm EDT

Test Anxiety? Learn How and When to Test Your Standby Generator

This webinar will discuss generator reliability, testing, and troubleshooting from a practical perspective and make recommendations for a comprehensive inspection and testing program.

Engineered Systems Magazine

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2014 August

Check out the August 2014 issue of Engineered Systems, with features on UFAD systems, cloud services, and much more!

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