Usually, the owners of country houses in the summer need additional living quarters. If the house is equipped with a pitched roof, then the attic after a small reconstruction becomes an attic. Cozy rooms, located under the very roof of the building, have one drawback that does not allow you to live there comfortably enough.
In the warm season, these rooms become unbearably hot. Although, when arranging an attic on the top floor of the house, its owners pay sufficient attention to the quality of the thermal insulation of its walls and roof, it is not possible to get rid of the heat characteristic of these premises only in this way. The installation of an air conditioner helps to solve this problem.
Benefits of an attic air conditioner
Increasingly, the owners of country houses provide for the installation of air conditioners on the attic floors, which can quickly cool the air in the premises to a comfortable temperature. At the same time, they relieve the attic of excess moisture, which can quickly render the wooden structures of the building unusable.
- The high temperature that occurs in the attic in the summer, becomes not only a cause of discomfort for the inhabitants of this room, but also spoils its interior decoration.
- No less harm is caused by summer rains, which can significantly increase the humidity in the room. High humidity in the absence of ventilation causes condensation.
The combination of these factors causes the appearance of mold and fungal spores on the wooden elements, gradually turning the attic into a room unsuitable for living.
You can quickly fix the situation only by installing an air conditioner. With its help, humidity and air temperature are optimized in the attic, which will preserve the quality of building and finishing materials in the room.
The situation can be partially corrected by the installation of windows equipped with ventilation valves and blinds that protect the room from sunlight.
Attic cooling without air conditioning
Owners of houses where an attic is provided are often interested in the question of the possibility of its operation without using an air conditioner. It is quite possible to do without air conditioning in the attic, but it is better to take care of this at the stage of building construction. To do this, it is necessary to ensure proper ventilation of the roofing system.
Roof ventilation, performed in compliance with all the rules, will provide sufficient air exchange, which will become a reliable protection of the roof from overheating, and will not allow moisture to enter the insulation. A good ventilation device will prevent the formation of condensate, which gradually destroys the roof, and also prevents the formation of icicles on the roof eaves.
To ensure high-quality ventilation between the layers of the roof structure, a certain order of their location should be observed:
- the roofing pie begins with fastening on the rafters (from the side of the room) a vapor barrier film or a minimum permeability membrane;
- then a heater is laid between the rafters;
- on top of the insulation on the rafters, a crate and a counter-crate are mounted;
- a layer of waterproofing is attached over the counter-lattice;
- the creation of a roof with a roof covering is completed.
With this order of arrangement of the layers of the roof structure, two ventilation gaps are formed. One of them will be located between the insulation and waterproofing, the second is formed between the waterproofing film and the roofing material.
Naturally, it must be ensured that air enters from below, in places inaccessible for clogging them with snow, as well as its exit from above with the help of a ventilation ridge or the installation of aerators in different places of the roof. Aerators should be protected from snow and rain getting into them with “umbrellas.
If the roofing pie is not arranged correctly, then you will have to remove its upper part and correct the mistakes made. If this work is not yet possible, then you will have to purchase and install an air conditioner.
To choose the most suitable unit, you should know what types of devices are offered on the HVAC market.
If the size of the rafters does not provide sufficient clearance, then additional bars are stuffed onto them.
Types of air conditioners
Before you choose an air conditioner for the attic, you need to decide on its type, find out what functions the unit design is equipped with, and what volume of the room it is designed for. For many homeowners, ease of installation is important, so the determining factor when buying is the ability to install the air conditioner yourself.
There are cases when the installation of a stationary device is not possible. This may be living in a rental property or in a building whose façade is of architectural value.
Mobile or floor monoblock
A mobile device is often the only purchase option that provides comfort on hot days. This device is more often called a floor air conditioner for the home, since it is placed on the floor surface.
The most common design of such a unit is a monoblock, in the body of which a condenser and an evaporator are placed simultaneously, elements that are essential components of any climate control system. The moisture obtained as a result of air cooling is collected in a special container, from where it should be periodically removed.
Although this device is called mobile, it requires certain actions to start it. The air duct, which is equipped with a monoblock, must be brought out into the street through a sealed hole, specially arranged in a window or wall of the building.
- Among the disadvantages of this device, consumers note noise during operation and a decrease in the useful area of u200bu200bthe room.
- The advantage of the mobile unit is its low cost and quick installation.
A split system in attic rooms is usually used when dividing a large attic area into several rooms. Structurally, the split system includes at least two blocks:
The outdoor unit contains the compressor, fan and condenser. This design is mounted outside the building — on the wall, balcony, and sometimes even on the roof.
The indoor unit of the system is installed indoors, while one outdoor unit can serve several indoor devices, each of which is connected to the outside of the split system with two thin copper pipes with a heat-insulating layer. Indoor units can be used not only to cool the air, but also to heat it.
An air conditioning system that includes several indoor units is called multi-split systems. The system is controlled by a control panel mounted on the wall of one of the rooms.
Indoor units in residential premises are most often installed on the walls. However, if the ceiling height in the room exceeds three meters, then it is better to install cassette air conditioners.
Their dimensions require at least 0.5 meters of free space behind the false ceiling to be placed, but their appearance fits perfectly into any interior, representing a neat lattice from the outside.
Duct air conditioners
For large premises, both residential and industrial, duct cooling systems are used.
A feature of channel devices is the placement of their indoor units in a hidden way. They are mounted in air ducts hidden behind the ceiling or in the wall. Only ventilation grilles will be visible on the walls or ceiling.
What is the difference between an inverter air conditioner and a non-inverter air conditioner?
Many consumers who are faced with the need to purchase climate equipment for the first time do not know how an inverter air conditioner differs from a non-inverter type of model. Even by the time the inverter unit appeared on the home appliance market (1980), it is obvious that this is a more modern version.
If you get acquainted with its capabilities, it becomes clear how manufacturers have improved this type of device. Previously, the unit could only turn off at a certain temperature and turn on when it rises.
- inverter device does not turn off at the right time, but starts to work with less productivity. Due to this property of the device, there are no sudden temperature changes in the room, and although it works almost constantly, due to a change in its performance, electricity is used much more economically.
- Lifetime inverter models are about 5 years longer than conventional models.
- Price higher, but the number of modes in which they can operate can significantly save on electricity.
It can be noted that when choosing an inverter air conditioner for the attic, the most popular are models manufactured by companies Toshiba and LG. Their purchase will cost about 20% more than conventional and will be from 25 0 to 300$depending on the available functions.
Calculation of the power of the air conditioner — how to choose the right model
The main criterion for choosing an air conditioner for an attic is its configuration.
- If this is a single room, then you can purchase a budget option that does not have special additional functions. It is better if it is of the inverter type, since it will allow you to get a constant temperature in the attic at minimal energy costs.
- If the attic space is divided into separate rooms, then it is better to install a multi-split system that allows you to ensure comfortable living in each of them. Next, you need to determine the power of the device. When getting to know the characteristics of the device, its cooling capacity is most important.
Most devices have a cooling capacity three times less than the power of the engine itself. That is, the cooling capacity of an air conditioner equipped with a 3 kW motor will be 1 kW.
The power calculation performed by professionals takes into account many parameters of the room.
However, in practice there is a simpler calculation option:
- For every 10 sq. meters of the room should account for 1 kW of cooling power.
- If direct rays of the sun enter the room for at least half a day, then it is better to add about 25% to the resulting figure.
- This will be the optimal value of the cooling power.
It is worth recalling that it is better to entrust the installation of a split system and its maintenance to professionals. With self-installation, difficulties may arise, the elimination of which will still require the services of a professional master.
Since the main functions of all modern cooling systems are similar, you should not pay attention to the “additional features” offered by manufacturers. They significantly increase the cost of the model, while not having practical value.