Daylighting is a term used to describe the amount of natural light passing through a window, door or skylight.

Daylighting is impacted by the size, placement and type of windows in a home or other structure. Daylighting helps reduce the need for artificial lighting in a home, therefore saving energy.

If you want to experience the benefits of daylighting and a view, you need a window to enjoy the view outside from the comfort inside your home.

If you live in a Northern climate, you can bask in the comfort of an outdoors view while remaining inside your home when the temperature plummets outside, because a residential window is helping keep the cold out and the warmth inside. Likewise, residential windows with low-E or low emissivity glass can help reflect the sun’s rays in the hottest part of the day, helping keep the home cooler in the summer. Types of glass options used in residential windows can help reduce solar heat gain, help you save energy and save on cooling costs.

What is Visible Light Transmittance (VT)?

The fraction of light that passes through window’s glass is known as Visible Light Transmittance (Tvis or VT). Visible Light Transmittance (VT) measures how much light comes through a product expressed as a value between 0 and 1. The lower the number the less of the sun’s visible light that is transmitted, where 1 would be the same as being outside in the sunshine and 0 would be total blockage of all light.