User Manual

The principle of demand-controlled ventilation
Energy consumption
BACS efficiency classes – EN 15232
BACS Building Automation and Control System
TBM Technical Building Management System
Without demand-controlled ventilationWithout demand-controlled ventilationWithout demand-controlled ventilation
Maximum occupancy
Maximum occupancy
Low occupancy
Low occupancy
With demand-controlled ventilation
With demand-controlled ventilation
With demand-controlled ventilation
High energy performance
BACS and TBM
Advanced
BACS and TBM
Standard
BACS
Non-energy-efficient
BACS
High energy performance
BACS and TBM
Advanced
BACS and TBM
Standard
BACS
Non-energy-efficient
BACS
A
A
✔
B
B
C
✔
C
D
D
Air
flow
Energy savings
Time
2500 m
3
/h 2500 m
3
/h
400 m
3
/h
2500 m
3
/h 2500 m
3
/h
Air
flow
Time
Siemens Switzerland Ltd
Infrastructure & Cities Sector
Building Technologies Division
International Headquarters
Gubelstrasse 22
6301 Zug
Switzerland
Tel [phone]
The information in this document contains general descriptions of technical options
available, which do not always have to be present in individual cases. The required
features should therefore be specified in each individual case at the time of closing
the contract.
© Siemens Switzerland Ltd, 2013 • BT_0032_EN
Buildings suitable for demand-
controlled ventilation applications
with most energy saving potential
Demand-controlled ventilation has
the most energy saving potential in
buildings where occupancy fluctuates
during a 24-hour period, is unpredict-
able, and peaks at a high level.
Examples are:
– Movie theaters, entertainment
and night clubs
– Auditoriums, schools and sport halls
– Restaurants, canteens and cafeterias
– Office buildings, government facilities
– Hotels and convention centers
– Retail stores and shopping malls
Benefits of demand-controlled
ventilation
– Cost savings through energy savings
– Improved comfort and healthy indoor
environment: Demand-controlled venti-
lation prevents under ventilation that
results in poor indoor air quality
– Cost-efficient solution thanks to retro-
fit ability in installed base: Demand-
controlled ventilation can be used
on existing, fully operational electric
HVAC systems
Highlights
■
Energy savings due to lower
power consumption of the
fan and reduced heat losses
of the ventilation system
■
Enhanced room comfort
owing to optimum fresh air
supply and lower fan noise
levels
■
Cost-efficient solution thanks
to retrofit ability in installed
base