Natural Light

Natural Light

People install windows primarily for daylight and views. Windows allow natural light to flood into the spaces creating an airy and spaciuos feeling. Studies have shown that increased daylighting improves worker productivity, patient health and well-being.

Visible Transmittance

The ability of a fenestration product to transmit daylight is called Visible Transmittance.

The potential for daylight in buildings is directly related to the amount of fenestration area installed on  building envelope and to the amount of light allowed through those systems into the building. Remember- we install windows primarily for daylight and views, so the higher the percentage of visible light transmitted, the better.

 

Spectrally Selective Window Glazing

Low-E glass is an advanced technologically of insulating glass that improves energy efficiency by reducing the transfer of heat or cold through windows, thus reducing heat loss but allowing the room to be warmed by direct sunshine.Houses with large amounts of sun exposure, will benefit from Low-E insulated glass that actually blocks damaging light from the sun and reducing solar gain through the windows, while maintaining high levels of visible light tramsmittance.  Daylight can save anywhere between 30% to 60% in building energy usage when intergrated with appropiate lighting controls.

 

Window Orientation

A window in the right direction has a big impact on its contribution to comfort, heating, cooling loads and daylight. Windows facing east and west get loe-angled sunlight in the mornings and afternoons, causing glare and overheating the house in summer. Windows facing south can get low-angle sun in spring, fall and winter, depends on how north you live. Shading of glass with overhanges, planting or shades will reduce glare, fading of furniture and localized overheating in rooms with south or west facing glass.