Thermal curtains are installed in rooms to get rid of drafts and protect the room from cold air that can enter through the front doors. This technique works like this: a powerful fan is installed inside the case, with the help of which air is supplied, and a thermal barrier is formed. This technique is widely used in shops, shopping malls, offices and other facilities where there is a lot of people traffic and the doors are opened frequently.
There are three types of thermal curtains: water curtains, electric curtains and air curtains without heating. Electric and water curtains have a heat exchanger that constantly maintains the heat of the air flow. Air curtains with an electric heat exchanger have a three-phase power supply. Let us explain that at the water thermal curtain the heat exchanger takes heat from the hot water supplied to it from the central heating system. This type of curtain is often used in industrial plants with a large open opening. Note that air curtains with a heat exchanger have the function of adjusting the air temperature. Thermal curtains without a heat exchanger also cope well with drafts, but when entering the room, a cold air stream will be unpleasantly felt. In winter, a thermal curtain will help maintain the desired temperature in the room without even closing the front door! And it will not significantly affect your budget. In summer, the use of the air curtain will prevent the air cooled by the air conditioner from escaping, and the heating at the air curtain must be turned off.
When choosing a thermal curtain, it is worth paying attention to the parameters of the doorway and the possibility of installing this equipment. It can be hung both horizontally and vertically, plus you can make the curtain built-in. The size of the doorway will affect the length of the equipment and the power of the air jet. The length of the curtains ranges from 600 to 2000 mm, the most commonly used curtains are 800 – 1000 mm long, suitable for a standard doorway. For optimal performance, the air curtain must be as long as the entire door frame. The installation height of the air curtain should be slightly higher than the opening, so that the air jet at the exit from the outlet grate has a speed of 8 – 10 m/s, and at the floor – 3 m/s. If the opening width is large, then you can use several devices installed in one line. Air heating can be done with water or electricity. The latter usually have a three-phase power supply.
In order to ensure maximum performance of the air curtain and extend its service life, it is necessary to regularly clean the grilles and fan from dust and dirt. It is recommended to clean the equipment at least once every 4 months. Accumulated dust can lead to excessive noise during air curtain operation.
A wide range of models of thermal curtains makes it possible to use them in various rooms. Thermal curtains are installed both in small shops and in large industrial premises.