The Swedish Boverkets byggregler § 6.322 Dagsljus, and SS 914201 states:

Rooms or separable parts of rooms where people are present other than occasionally shall be designed and oriented to ensure adequate access to direct daylight is possible, if this does not compromise the room's intended use. However, in common spaces according to Section 3:227, access to indirect daylight is sufficient. (BFS 2016:6) ...


General recommendation

For calculation of the area of the window glazing, a simplified method according to SS 91 42 01 can be used. The method applies for room sizes, window glazing, window placement and shielding angles according to the standard. When used, a general figure for the window glazing area in the room should be at least 10% of the floor area. It entails a daylight factor of approximately 1% if the conditions of the standard are met. For rooms with other conditions than those specified in the standard, the window glazing area can be calculated for the daylight factor 1.0 % according to the standard’s annex. (BFS 2014:3).


Link to Daylight Application

The simplified method according to SS 914201 can be calculated with the Naviate Daylight application.

The daylight factor needs to be calculated with a dynamic daylight tool calculating the daylight factor, and cannot be calculated with the Naviate Daylight application.



Application settings

  1. Under Settings, set the calculation standard to "Swedish building regulations..."
  2. Add the missing glazing material names for the project.
  3. Add the room names of the balconies in your Revit model.
    Please make sure in the model all balconies have a room and a balcony room name
    As a result, some rooms will have a bigger floor area, because of the floor area of the balcony above, so there is more glazing area needed to meet the minimum of 7% (or 10%) daylight ratio.
  4. Click "Ok". The daylight areas will now be calculated.
  5. Select which rooms are required to have daylight by changing the checkbox "requires daylight" for each room.  
    • You can also quickly change multiple daylight requirements per room at once, by using the "auto-fill required values". Type in the (part of the) room names and the required percentage; for point b. is this 0% for corridors (no daylight required) and 7% for living rooms and other occupiable rooms. For point c. is this 0% respectively 10%.
    • Another option is to change the room parameter in Revit by selecting one or multiple rooms in Revit, and change the value "Required Window-to-Floor ratio"; 0% for rooms not needing daylight, and 10% for rooms needing daylight.
  6. You're now set for Swedish Daylight calculation for your project!

Calculation

  • The minimum height for the daylight area is 800 mm, so all glazing area below 800 mm above floor will not be counted. For more info see calculation method, minimum height above floor.
  • The balcony area next to a window will be added to the adjacent room. See below image from the TEK17 documentation. For more info see calculation method, adding balcony area.
  • The shading angle of any surrounding elements will be calculated perpendicular to the middle of the window.
  • A comment will be added to the room, if the room does not meet the criteria according to SS 914201, If...
    • The dimensions of a window is too small or too great.
    • The dimensions of a room is too small or too great.
    • There are too many windows in one wall orientation in a room.
    • There is too much shading obstructions to the horizon in front of the window, so that the shading angle is more than 30°.


Reporting

Now make sure all rooms are green, by adding more windows, or changing window dimensions in Revit. When all rooms are green, daylight requirements are met, and results can be reported.

  • You can report results by clicking the "Report" button. The application will now generate a Word document with all daylight results per room and per window.
  • You can also generate a 3D visualisation by clicking the "Visualization" button, and you can generate a coloured "Revit floor plan" by clicking the Revit floor Plan.
  • After clicking "save & close" all Daylight results will be saved as shared parameters in your project. You can make custom room and window schedules to report these calculated daylight values throughout Revit.