• 3 available credits
• Credits worth 1.17% points each
• Mandatory Element: No

Aim: To promote good daylighting and thereby improve quality of life and reduce the need for energy to light the home.

Assessment Criteria:

Full HEA1 2010 Issue

• 3 available credits
• Credits worth 1.17% points each
• Mandatory Element: No

Aim: To improve the quality of life in homes through good daylighting and to reduce the need for energy to light the home.

Assessment Criteria:Credits are awarded for the dwelling meeting the criteria below:

Full HEA1 2009 Issue

BRE IP 23/93:BRE Information paper 23/93 measuring daylight

BS 8206-2 Lighting for buildings. Code of practice for daylighting (1992) CIBSE Lighting Guide 10: 1999. Daylighting and window design

P.J.Littlefair, Site layout planning for daylight and sunlight: a guide to good practice (1998)

BRE IP4/92. Site layout for sunlight and solar gain (1992), BRE

Additional information

BR 288. Designing buildings for daylight. James Bell and Bill Burt (1995)

Daylight calculations are carried out by to determine the effectiveness of natural light that is anticipated to penetrate a room, factors such as the size of the opening, reflectivity of surfaces and view of clear sky from a window will all affect the daylight factor in a room, the results of the calculations gives the daylight factor (DF) for the room. The DF is required to reach different calculations levels for different rooms.

- Kitchens must achieve a minimum Average Daylight Factor (DF) of at least 2%

(1 credit available if achieved)

- All living rooms, dining rooms and studies (including any room designated as a home office under ENE 9 - Home Office) must achieve a minimum Average Daylight Factor (DF) of at least 1.5%.

(1 credit available if achieved)

- 80% of the working plane in each room (including any room designated as a home office under ENE 9 - Home Office) must receive direct light from the sky.

(1 credit available if achieved)

A total of 3 credits are available if all criteria for day lighting is met.

The calculations can be used to achieve the required credits within the Code for Sustainable Homes Assessment.

We only require you to provide us with sufficient plans of the project you wish to obtain daylight calculations for, such as floor plans, elevations and a site plan.

We will complete all the necessary calculations and provide you with a daylight calculations report outlining all the credits you have achieved for issue HEA1 - Average Daylight Calculations and the No-Sky Line.