User Manual

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4.4.1. Overall BACS efficiency factors for thermal energy
The BACS efficiency factors for thermal energy (heating, DHW and cooling) are classified based on
building type and efficiency class to which the BACS/TBM is related to. Factors for efficiency class C
are set at 1, since this class represents the standard case for a BACS and TBM system. Application
of efficiency class B or A always results in lower BAC efficiency factors, i.e. it improves a building’s
energy efficiency.
Non-residential building types
BACS efficiency factors thermal f
BAC,th
D C B A
Non energy
efficient
Standard
(reference)
Advanced
energy
efficiency
High energy
performance
Offices
1.51 1 0.80 0.70
Lecture halls
1.24 1 0.75 0.5
a
Educational buildings (schools)
1.20 1 0.88 0.80
Hospitals
1.31 1 0.91 0.86
Hotels
1.31 1 0.85 0.68
Restaurants
1.23 1 0.77 0.68
Wholesale and retail buildings
1.56 1 0.73 0.6
a
Other types:
· Sport facilities
· Storage
· Industrial facilities
· etc.
1
a
The values are highly dependent on heating/cooling demand for ventilation
Residential building types
BACS efficiency factors thermal f
BAC,th
D C B A
Non energy
efficient
Standard
(reference)
Advanced
energy
efficiency
High energy
performance
· Single family dwellings
· Multi family houses
· Apartment houses
· Other residential or residential-like buildings
1.10 1 0.88 0.81