User Manual

Page 36 Unrestricted 0 – Siemens Smart infrastructure
Glossary
AHU Air handling unit
AQI Air quality index
BACS Building automation and control system
CO
2 Carbon dioxide
ESP Electrostatic precipitator
FCU Fan coil unit
HEPA High-efficiency particulate air
IAQ Indoor air quality (combined measure of CO
2 and VOC levels)
NO
2 Nitrogen dioxide
PM2.5 Particulate matter (less than 2.5 microns in diameter)
PM10 Particulate matter (less than 10 microns in diameter)
ppm Parts per million
RH Relative humidity
SBS Sick building syndrome
SO
2 Sulphur dioxide
% r.h. Relative humidity as a percentage
VAV Variable air volume
VOC Volatile organic compounds
WHO World Health Organization