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Assessment of overall energy use and definition of energy ratings

Renewable energy systems ( ) Heating systems ( )

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Hot water systems ( ) Lighting systems ( )

External climate data !"# $

Non recoverable thermal losses from technical systems; auxiliary energy use

Vent.system heat recovery

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Air flow/infiltration ( )

Solar properties Delivered energy for heating and

cooling, per energy carrier

Delivered energy for hot water, lighting and ventilation system and (de )humidification, per

energy carrier

Partitioning of building into zones for calculation, including system criteria

Dynamic parameters Solar and internal heat sources Ventilation and transmission heat transfer

Specified indoor conditions Energy use for heating and cooling

Simple hourly Monthly (or seasonal) Dynamic simulation

Zoning rules, building part Climate data

Properties

Climate data Project data (building, systems, use,

surroundings, location)

Data for existing buildings

D a ta f o r e x is ti n g b u ild in g s ( ) Project data P ro je c t d a ta Properties B u ild in g e n e rg y n e e d s fo r h e a ti n g a n d c o o lin g General criteria and validation procedures

Indoor criteria, automation and controls ( )

version: 2006 10 11

Recoverable thermal losses from technical building systems Three (national) options for calculation of

building energy needs for heating and cooling

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