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COMFORT
Though standards de ne and qualify the different performance levels that can be achieved for different comfort criteria, it is the project owner’s responsibility to de ne the levels he wants to achieve in his building.This means that a speci c set of speci ca- tions has to be compiled for each project.
In the case of the AGC Glass Building, as foreseen by the stand- ards, this set of speci cations has been annotated and approved by the Director of Corporate Social Responsibility (CSR), the facility manager, the occupational physician and the head of information and communication technology (ICT).
CRIteRIa FOR tHe INDOOR eNVIRONmeNtaL PaRameteRS
For the AGC Glass Building, the client has speci ed category B for each criterion, with the exception of indoor air quality, set at category C.
tHeRmaL COmFORt – tHe INDOOR temPeRatuRe IN SummeR aND WINteR
Classi cation of thermal comfort is based on the PMV-PPD indices speci ed in standard NBN EN ISO 7730: 2006 (Ergonomics of the thermal environment -- Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria).Three quality levels exist, based on the percentage of people dissatis ed with general thermal com- fort (PPS) and local comfort (PD).
Description
High level, for spaces occupied by very sensitive and fragile persons with special requirements like the handicapped, sick, very young child- ren and elderly people
B Normal level, recommended for new buildings and refurbishment projects
C acceptable level, foruse in existing buildings
table 2.thermal comfort quality levels
Of ces and meeting rooms
For the conditioned parts of the building (of ces, restaurant, meet- ing rooms), the calculation of the mechanical cooling load accord- ing to standard NBN EN 15255: 20071 must show that the installed power is such that the PMV values do not exceed the value cor- responding to category B for more than 3% of the building’s occu- pancy period.
The standard NBN EN 15251: 2007 (Indoor environmental input
parameters for design and assessment of energy performance
of buildings addressing indoor air quality, thermal environment, Categories lighting and acoustics) evaluates six comfort criteria: A
– thermal comfort in winter;
– thermal comfort in summer;
– indoor air quality;
– visual comfort – lighting;
– acoustic comfort – noise;
– draught.
For each criterion, the norm speci es three quality levels:
Category explanation
A high level
B Normal level
C Acceptable level
table 1. Levels of indoor environment quality