The Physics of Infrared Panels
From the aspect of infrared heating, there is short-wave and long-wave infrared. The short-wave infrared is of high temperature, such as gas infrared heaters with red radiation whose temperature is /700 to 800 °C/ or infrared gas heaters with dark radiation whose temperature is /350 to 400 °C/.
They are suitable for heating uninsulated rooms with large clear height and space.
The long-wave infrared is of low temperature, this type of infrared is used by the Suntherm infrared panels whose temperature is /90 to 110 °C/.
The Suntherm panels are suitable for heating well insulated rooms with small clear height and space. Short-wave and long-wave infrared radiation changes due to temperature difference. Infrared heaters working with a temperature range above 250 °C are of short-wave, while those working with a temperature range below 250 °C are of long-wave. The short-wave infrared can go through the layers of air or glass ahead it. The long-wave infrared, on the other hand, cannot go through those materials. The Sun radiates high-temperature short-wave infrared to the Earth, which can go through both the air layers and the window glass. After reaching the Earth, the solar radiation cools below 250 °C, then is reflected as long wave. Since the long-wave radiation cannot go through the layers of the atmosphere, the Earth cannot cool down; this phenomenon is called greenhouse effect.
While radiating through the windows, the thermal energy from the Sun can supplement the heating system installed in the flats and houses, due to its short-wave infrared features. Heat energy generated with heating systems utilizing Suntherm heating panels will stay within the buildings, because the radiating panels emit long-wave infrared with low temperature, and the heat radiated so cannot go through the glass of the window, therefore heat radiation from such heating system cannot go outside.