UncategorizedMarch 29, 2023by Alex

What makes an air conditioner work?

The operation of the air conditioner is based on the ability of liquids to absorb heat through evaporation and release it through the transition from the gaseous state back to the liquid state. The role of this liquid is played by the refrigerant Freon, which changes its aggregate state depending on fluctuations in temperature and pressure in a closed system.


The air conditioning unit transfers heat from the room to the outside – to the location of the condenser. The movement of refrigerant through the circuit is provided by the compressor operation.


The power consumed by the air conditioner


The kilowatt consumed by the air conditioner is about one-third of the cooling or heating capacity. It means that for each kilowatt of energy consumed by the device, 2,5-3 kilowatts of released cold or heat is necessary. Thus it is spent not for cooling or heating the air, but for transferring cold/heat into the room from the street. That’s why a domestic air conditioner with a cooling capacity of 2 kW consumes not more than 650-700 W, and one can plug it into a usual socket.


Types of air conditioners


According to the type of construction, domestic conditioners are classified into such groups: monoblock and split-systems. The last ones, according to the types of internal blocks are divided into the wall, floor-ceiling, column, cassette, and channel. Monoblock models can be Windows and mobile.


Window models


Window air conditioners are installed in openings on windows or thin walls so that the backs of the cases face the street. This, in turn, reduces the glazed area of the room. Compared with classical split systems they have a higher level of working noise, though they are characterized by relatively low prices, simplicity of installation works, and reduced quantity of freon in the systems. Because of all these window conditioners are still in demand among consumers.


Portable air conditioners


Mobile air conditioners are easily installed and relocated inside the premises, which is radically different from other kinds of similar equipment. The hot air is taken outside with the help of flexible air ducts, which are mounted in windows or vents in advance. Some models can additionally clean the air from dust due to the built-in filters and ionizers.


The advantages of such air conditioners are as follows:


– mobility (can be taken with you to the cottage or other place of rest);

– the simplicity of use and installation;

– can both cool and heat air (in some models).


Choosing a portable conditioner, take into consideration the fact that its efficiency will be a little bit lower than that of a split system with the same power.


Two-kilowatt split-system (7000 BTU) will correspond to a mobile model with 9000 BTU capacity in a standard room: the area is within 20 sq.m., ceiling height is up to 3 m, there is one window and the average sun insolation is observed during the day.




Split systems are the most popular among users. They got their name from the English word split, which means “separated”. All split systems consist of two blocks: internal, which is set up indoors, and external, which is mounted on the street. The internal one provides cooling (or heating in the case of inverter conditioners) inside the buildings, and the outer air does not get inside. Blocks are connected with the help of copper pipes, through which freon circulates.


Such air conditioners can not only change the temperature in a room or regulate humidity. They also clean the air from dust, foreign odors, and bacteria due to the filters, built into the internal blocks. Since the compressor, as the “loudest” knot of the split system is situated inside the outside block, the noise of this type of a/c is much lower than in any window or mobile model.


Split systems of wall type


Wall split system consists of inside (evaporative) and outside (compressor-condenser) blocks. The last one can be installed on external walls of buildings with the help of special fasteners, and also in basements, attics, and utility rooms.


To pump freon, wall-mounted air conditioner units are connected by thin copper pipes covered with thermal insulation material. They can be hidden in different constructive elements of a room finishing, for example, suspended ceilings, or simply closed in decorative plastic boxes, which have a section within the limits of 40-70 mm.


The capacity of such devices, as a rule, is in the range of 1.5 to 10 kW.


The main advantages:

– Demonstrate low noise level during operation;

– do not take up much space in the room.



– installation of such systems can only be performed by specialists;

– The need for periodic maintenance.


SDAC Heating & Air Conditioning can help you with any project, no matter whether it is the installation of a new HVAC system with efficiently routed ducts or a repair of a current system. You will always receive sound advice on any case. Our specialist at SDAC Heating & Air Conditioning will examine the ducts in your San Diego County home to make sure there are no leaks that should be addressed to avoid any malfunction in the future.


Any service is one using only high-quality parts and materials and we will always stand behind all of our results. Our technicians are equipped with a wealth of professional tools and are highly trained. Their professionalism, experience, and friendliness will make any ductwork job go smoothly from the beginning to the end.


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