Daylight

Groups: 
  • Design Projects
Category: 
  • Indoor Climate
  • Environment
  • Buildings

Basic

Requirements and Criteria Type: 
  • 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 stage and detailed design phase 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 delivered after the preliminary project.  

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

Example of a table that can be used in the execution of a contract showing the room plan and daylight requirements
Room type or room number The room must satisfy the daylight factor requirement of 2.1% The room must satisfy the regulatory daylight requirements The room is not defined as a room for permanent occupancy (note the reasons if necessary) The room is exempt from daylight requirements for reasons other than occupancy
         
         
         
Information about the Requirement Specification: 

The requirement in TEK states that the documentation must be in place before takeover. Documenting daylight in the design project increases the likelihood of good daylight conditions.

You can find section 13-7 of TEK17 and guidelines here

Advanced

Requirements and Criteria Type: 
  • 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, concept design and detailed design phase 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.

Example of a table that can be used in the execution of a contract showing the room plan and daylight requirements
Room type or room number The room must satisfy the daylight factor requirement of 2.1% The room must satisfy the regulatory daylight requirements The room is not defined as a room for permanent occupancy (note the reasons if necessary) The room is exempt from daylight requirements for reasons other than occupancy
         
         
         
Information about the Requirement Specification: 

The requirement in TEK states that the documentation must be in place before takeover. Documenting daylight in the design project increases the likelihood of good daylight conditions.

You can find section 13-7 of TEK17 and guidelines here

Related links: 

Published: 06. Feb 2018, Last modified: 26. Sep 2018