With the arrival of the cold weather season the spaces outside the house are likely to remain unused due to low temperatures.
There are different ways to make them comfortable in every time of the year, maintaining a temperature allowing you to enjoy your terrace, veranda or garden even during the winter.
Most of the restaurants and pubs choose simple braziers - iron containers where to light a small controlled bonfire -, floor standing mushroom gas heaters or gas stoves. Generally this kind of devices are made of painted steel and equipped with an aluminum reflector: its emits the heat produced through LPG gas cylinders.
More and more people, however, choose a much more efficient and sophisticated way to heat up their outdoor environments: we are talking about electric energy heating lamps, high thermal output devices based on the principle of infrared rays. These halogen lamps ensure rapid and optimal heating of the surrounding area.
Let's see the advantages:
But how do halogen lamps work?
The principle of operation of these outdoor heating lamps is based on irradiation: instead of heating the surrounding air by simple heat transfer through a fluid, these devices heat directly the elements positioned in the surrounding area by infrared radiation.
To make a long story short, the waves are absorbed by solid matter only and not by fluids (as air itself). The radiation emitted by the lamp is "transformed" into heat when it comes into contact with a colder element, which can be a person, an object or a wall.
This means that thermal dispersion is reduced to a minimum, allowing a very efficient and without waste heating: the heat is distributed only where it is needed, thus reducing also energy consumption.
Also, there are several "tricks" to optimize the heat produced by these innovative devices:
Choose the appropriate power for your type of environment
In an outdoor area not shielded from the wind, the power required to achieve comfortable warmth is high. Generally, it is estimated to be 750-1000 W / m².
In partially closed spaces obtaining a comfortable indoor temperature is simpler thanks to the absence of the wind; however, the feeling of cold may remain, as in most cases the structures have poor thermal insulation. In this case too, therefore, a high power will be needed, even if lower than in outdoor installations. The estimated required power is 250-600 W / m², which can vary according to the existing insulation.
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