Dennis Guichard

Up until recent times, it was believed that light was only needed for seeing. However, in 2001, American scientist, Brainard, discovered a circadian photoreceptor in the retina of the eye,…

Everything has an emissivity value, your clothes, a table... for example, cast iron has an emissivity of .85 which means that 85% of heat that comes in contact with its…

The ability of a material to radiate energy is known as emissivity. In general, highly reflective materials have a low emissivity and dull darker coloured materials have a high emissivity.…

In colder climate locations single-glazed low-e glass can sometimes be used to reduce heat loss in winter. Normal clear glass allows most of the heat radiation coming from inside your…