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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, that receives a specific quality and quantity of light, which sets the biological clock. He discovered that light not only provides us with the ability…

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 surface will pass through/into it. Aluminium has a natural low emissivity value of just .03… This means that aluminium will only allow 3% of radiant heat that…

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. Low emissivity (low-e) refers to a surface condition that emits low levels of radiant thermal infrared (heat) energy. Surface emissivity is the amount of infrared energy…

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 house to pass through to the outside. By using low-E glass this radiant heat is largely reflected back into the room, thereby reducing heat loss…