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All studies and tests have proven that air curtains are effective. When an efficient air curtain is well installed it save lots of energy and at the same time the entrance areas remain climate protected, comfortable and free of draughts, insects, odours, etc. Following the laws of physics, the light heated air on the left of the image, goes up by natural convection and escapes to the cooler side while the heavier unheated cold air penetrate from the outside flowing through the floor. In this situation we waste lots of energy and the heater is not able to keep comfortable the internal area.
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Why Is My Addition Always Cold? Five Ways To Improve The Comfort of Your Addition

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Are air curtains effective?

On previous pages of this lesson, we have learned that heat is a form of energy transfer from a high temperature location to a low temperature location. The three main methods of heat transfer - conduction, convection and radiation - were discussed in detail on the previous page. Now we will investigate the topic of the rate of heat transfer. This topic is of great importance because of the frequent need to either increase or decrease the rate at which heat flows between two locations.
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Are air curtains effective?

Introduction The quotes below provide a profound lesson in the need for housing to provide protection from both the heat and cold. The bitter cold that gripped the Northeast through the weekend and iced over roads was blamed for at least three deaths, including that of a Philadelphia man found inside a home without heat. Heating and cooling are not merely a matter of comfort, but of survival. Both very cold and very hot temperatures can threaten health.
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For those who have a great room, kitchen addition, or bathroom addition, fall is often the beginning of a long stretch of comfort issues — no amount of space heating, blankets, or extra sweaters seem to provide the comfort necessary to truly enjoy these newer spaces. As it turns out, replacing the outdated incandescent high-hat recessed lighting light bulbs in the ceiling of your addition with energy-efficient LED retrofit kits may have more benefits than you might have originally thought. As a result, the light fixture's ventilation system is directly connected to your roof's ventilation system, and the two systems work together to pull warm air from your living spaces during cold winter months. LED retrofit bulbs are often sold with a bulb and replacement housing manufactured together as one unit, designed to replace both the light bulb and the surrounding plastic housing located inside of the fixture. LED bulbs exude a fraction of the heat of their incandescent counterparts and therefore, do not have the same ventilation requirements as incandescent bulbs.
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