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Application of EN 15232 gives rise to diffe-

rent energy efﬁ ciency factors for different

building types, with regard to the use of ther-

mal and electrical energy. In the evaluation

of buildings, the energy efﬁ ciency class C is

the reference class for the implementation

of measures for energy optimisation.

The red ﬁ eld in the table on the right-hand

side shows how the thermal energy con-

sumption of a building with efﬁ ciency class

A with a factor of 0.7 can be reduced by up

to 30 %.

VDI 3813 – room automation

VDI 3813 describes the integrated room auto-

mation with special consideration for intero-

perability of different building systems, based

on usage requirements. To provide a uniform

assessment basis for owners, planners and

system integrators, clear terms and functions

are deﬁ ned in the norm.

The current difﬁ culty is that in invitations

to tender, room automation functions are

dealt with separately from the building sys-

tems connected with technical development.

In practice, this often means that existing

potential for saving energy remains unused.

The VDI 3813 supplements the EN 15232

by providing a precise description of the

room automation functions described there.

It is important that EN 15232 and VDI 3813

are applied as early as the basic evaluation

and pre-planning stage.

The table on the right-hand side shows the

room automation functions of the VDI 3813,

relating to the energy efﬁ ciency classes of

EN 15232.

Basic principles and standards of building automation | Use in room automation

Building Automation and Control (BAC)

Efﬁ ciency classes EN 15232

Efﬁ ciency factor

for thermal

energy

Efﬁ ciency factor

for electrical

energy

Ofﬁ ce

School

Hotel

Ofﬁ ce

School

Hotel

Highly efﬁ cient Building Automation and Control System

(BACS) and Technical Building Management (TBM)

0.70 0.80 0.68 0.87 0.86 0.90

B Advanced BACS and TBM 0.80 0.88 0.85 0.93 0.93 0.95

C Standard BACS 1.00 1.00 1.00 1.00 1.00 1.00

D Non-efﬁ cient BACS 1.51 1.20 1.31 1.10 1.07 1.07

Application function

BAC efﬁ ciency

classes in ac-

cordance with

DIN EN 15232

DCB

Basic functions affecting energy efﬁ ciency

Occupancy control x x

Time program

Illumination functions which inﬂ uence energy efﬁ ciency

Light switching x

Automatic lighting

Daylight switching

Constant light control

Solar shading functions which inﬂ uence energy efﬁ ciency

Automatic solar shading x

Louvre adjustment

Shading correction

Thermo-automatic control

Air conditioning functions

Energy level selection x

Energy level selection with start optimisation

Target value calculation

Function selection

Temperature control (heating/cooling)

Room/intake air temperature cascade control

Ventilator control

Sequence control

Setpoint control

Air quality control/regulation

Night cooling

Load optimisation

Source: VDI 3813 part 2

Source: DIN EN 15232, table 9, table 11

We reserve the right to make technical changes.

New Automation Technology

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