BACnet - iGuzzini

8
Building design
efficiency
factors
Energy savings
for electrical energy
consumption in
non-residential
buildings
Energy savings can be
achieved by changing from
a class C building
to a B or A class
Energy efficiency
The UNI EN 15232 standard clearly indicates the benefits to be
gained by moving from one efficiency class to another.
An analysis of the table allows us to make immediate qualitative and
quantitative assessments regarding the benefits to be gained by using
an automation system in a building. Especially with regard to electrical
energy consumption, by passing from a C efficiency class to a higher class
means moving from a minimum saving of 2% (class B) to a maximum
saving of 14% (class A); for residential buildings this means moving from a
minimum saving of 7% (class B) to a maximum saving of 8% (class A).
class A high efficiency
class B advanced automation
class C standard automation
class D no automation
BACS Building Automation and Control Systems
TBM Technical Home and Building Management
Type of
Building/Room
BACS efficiency classes and factors
D C B A
Savings gained by adopting B and A
classes instead of C and D
B/C
saving
B/D
saving
A/C
saving
A/D
saving
Offices 1.10 1.00 0.93 0.87 7% 16% 13% 21%
Reading rooms 1.06 1.00 0.94 0.89 6% 11% 11% 16%
Schools 1.07 1.00 0.93 0.86 7% 13% 14% 20%
Hospitals 1.05 1.00 0.98 0.96 2% 7% 4% 9%
Hotels 1.07 1.00 0.95 0.90 5% 11% 10% 16%
Restaurants 1.04 1.00 0.96 0.92 4% 8% 8% 12%
Stores/
Wholesalers
Table taken from UNI EN15232
1.08 1.00 0.95 0.91 5% 12% 9% 16%
Energy classes B A
Electrical energy -7% -13%
Thermal energy -20% -30%
High performance energy BACS and TBM systems
BACS automation and advanced control systems
Traditional automation and control systems
Systems with no automation or control facilities