The function and operation of the fan coils

A fan coil is a member of an HVAC (air conditioning) system that is widely used in residential, office, commercial, etc. buildings today. Fan coils are very similar in terms of structure and they all consist of a set of coils (several rows of bent pipes) and a fan, and it can be said that copper is used for pipes for better heat transfer. In fan coils, a valve is placed in the inlet part of the coils and its role is to control the flow of cold water or hot water entering the pipes, also the speed of the fan is reduced and increased according to the required temperature. The way the fan coil works is that in the summer season, cold water from the chiller enters the coil, and by rotating the fan and blowing air into the cold coils, cool air is transferred into the room. In the winter season, instead of cold water, hot water flows from the engine room or the package in the coils, and this time the copper pipes and aluminum fins of the coil are heated, and the hot air is blown out by the fan. In addition, if air filtration is required, special filters are used in the air path.
Fan coils are simple to install, but still, require regular maintenance to ensure proper operation. When a fan coil cools the air, the condensed water on the coils enters the tray below it and is drained from there by the drain pipe.

Click to view brands, models, different types, prices, and purchase of fan coils.

The structure of different types of fan coils

Fan coils are produced in ground-facing or top-facing, surface-mounted or built-in, ceiling and wall types, which almost all have the same function, and the difference is in their appearance and how to install them. Some of the fan coils, which are known as channel fan coils and are produced up to 2000 CFM capacity, have ducts and transmit the required air through these channels, but ground, wall, ceiling, and even ceiling fan coils do not have channels. And they only circulate the air inside the building and reduce or increase its temperature. In addition to the way of channeling, fan coils also differ in terms of how they are installed, some of them are built-in (hidden, not visible) and some are surface-mounted (exposed). The work of the fan coils is similar to each other, whether they are built-in or surface-mounted.

How cooling and heating work in the fan coil system

The fan coil alone is not able to cool or heat the air and in large buildings, it needs water heating systems such as engine room or package and cold water systems such as a chiller or mini chiller. In a building, several fan coils are installed in different units, all of which are connected to the aforementioned heating and cooling water systems through separate hot and cold water pipes. In this way, the temperature of the devices in each section can be adjusted separately and the hot and cold air of the fan coil can be used at the same time in one season of the year. Using this system is a very good option for places where each room or hall needs separate temperature control.

Read more: Getting to know the structure of fan coil piping

Approximate calculation of fan coil capacity

The estimation of the required fan coil capacity for each of the sizes presented in the table below is approximate and based on the temperature conditions of the design inside and at the maximum fan speed, and in the average speed, the correction coefficient of the ventilation volume of the fan coils is compared to The fast speed is about 0.8 and about the cooling and heating power is about 0.85. If you wish, you can also contact the experts of DamaTajhiz company.
In the table below, the approximate estimate of the fan coil capacity required for cities such as Tehran, Mashhad, Karaj, Isfahan, Erbil, Kabul, Sulaymaniyah, and Halba with similar weather in summer weather conditions is presented.

 DamaTajhiz; The best prices and brands of construction equipment 

Final word

In this article, we learned about the function and operation of fan coils. For more information and to see the types, and brands, to know the updated prices, and also to buy fan coils and hundreds of other products, you can go to the website of DamaTajhiz specialized collection (the first and most reliable specialized collection in the field of building equipment and all air conditioning devices since 1383 and has 3 valid business licenses. Also, in order to check and choose the fan coils needed for your project, you can contact the experts of the air conditioning equipment department in DamaTajhiz during office hours.

Related articles

In order to get more information, it is recommended to read the articles related to the function and operation of the fan coil.

• What is a fan coil?
• Difference between fan coil and air handling unit
• Fan coil power consumption
• Comparison of fan coil and ducted split
• Ceiling fan coil

We are waiting for your call and look forward to meeting you at the DAMATAJHIZ group

By sharing the above article on social networks, let your friends know about its important content.