Daylight

• Technical Specification (Requirement Specifications)

Main Objective: 

Motive

Compact building bodies with thick walls that are often preferred to provide energy-efficient buildings make it more difficult to achieve satisfactory daylight. Daylight is very important with respect to human health and well-being, and is essential for efficiency and safety in work operations. Daylight requirements are regulated by building regulations and are often not very satisfactory when executed, especially with thicker walls due to increased insulation. At the same time, it is important that what is built is usable with good experienced quality for users.

Argument

The daylight criteria must at level 1 increase the certainty of the daylight requirements being satisfied by the execution and at level 2 allow stricter requirements for daylight to be set than those required by the regulations.

Requirement Specification: 

The requirement for the average daylight factor in TEK17 is a minimum of 2.0%. This must be documented by calculations in each project phase, i.e. choice of concept, concept design phase, detailed design phase and finished building before handover as defined in "Next Step".

Compliance must be documented by calculations for the daylight conditions. Calculations must be performed using simulation tools validated pursuant to CIE 171:2006  and assumptions provided in  NS-EN 12464-1:2011 chapter 4.4.

For rooms in dwelling units, the daylight requirement can alternatively be documented using the method stated in the guide to TEK17, section 13-7, paragraph two, pre-accepted performances, subsection 1b.

Room programme with comments indicating which rooms your project has defined as rooms for permanent occupancy and which rooms are not defined as rooms for permanent occupancy, based on the guide to TEK17, section 13-7, must be provided after the preliminary project. 

Exceptions mentioned in the guide to the Regulation must be noted in the table below.

• Technical Specification (Requirement Specifications)

Main Objective: 

Motive

Compact building bodies with thick walls that are often preferred to provide energy-efficient buildings make it more difficult to achieve satisfactory daylight. Daylight is very important with respect to human health and well-being, and is essential for efficiency and safety in work operations. Daylight requirements are regulated by building regulations and are often not very satisfactory when executed, especially with thicker walls due to increased insulation. At the same time, it is important that what is built is usable with good experienced quality for users.

Argument

The daylight criteria must at level 1 increase the certainty of the daylight requirements being satisfied by the execution and at level 2 allow stricter requirements for daylight to be set than those required by the regulations.

Requirement Specification: 

The average daylight factor in rooms intended for permanent occupancy is a minimum of 2.1% and this must be documented by calculations in each project phase, i.e. choice of concept, detailed design phase and finished building before handover as defined in "Next Step".

Compliance must be documented by calculations for the daylight conditions. Calculations must be performed using simulation tools validated pursuant to CIE 171:2006  and assumptions provided in  NS-EN 12464-1:2011 chapter 4.4.

For rooms in dwelling units, the daylight requirement can alternatively be documented using the method stated in the guide to TEK17, section 13-7, paragraph two, pre-accepted performances, subsection 1b.

Room programme with comments indicating which rooms your project has defined as rooms for permanent occupancy and which rooms are not defined as rooms for permanent occupancy, based on the guide to TEK17, section 13-7, must be provided after the preliminary project. 

Exceptions mentioned in the guide to the Regulation must be noted in the table below.