The main requirements of the bathroom ventilation - proper air circulation and reducing humidity levels
Excessive moisture in the bathroom create an atmosphere conducive to the emergence and growth of mold and fungi, which leads to the destruction of the walls, ceiling and floor and coating, damage to furniture. Even waterproof technique is preferable to operate in a dry atmosphere: it provides security and increases its service life.
Stale air creates health problems. In a wet bathroom can be got insect. Finally, the unpleasant odors from the air ducts simply annoying. All this leads to a decrease in the level of comfort and the deterioration of the standard of living in a single room.
Different types of exhaust fans for bathrooms
What should be the ventilation in the bathroom and the toilet?
There are two main types of premises Ventilation:
- The natural supply and exhaust.
- Artificial, forced air exchange.
Natural aeration and ventilation
The natural supply and exhaust ventilation system - one of the standard solutions of ventilation problems in most modern buildings like apartment buildings, both public and private. The system operates through a combination of air-supply and exhaust openings gateways. Ventilation holes are panes in windows, ventilation recesses in the lower part of the door, the gap between the door and the floor. Exhaust vents are designed in the form of air holes in the top of the walls, near the ceiling, or on the ceiling.
Natural ventilation and fan installed with a check valve in the bathroom
The quality of natural ventilation depends solely on the thrust in exhaust channels, which creates a pressure difference inside and outside. Thrust is created by a number of factors:
- air flow into the room from the outside;
- air temperature inside as well as outside it. The intensity of air decreases with an increase in the outside temperature;
- unimpeded movement of air masses on the suction channels. Dirt, dust, spider webs, which over the years are accumulated in the extract, inhibit air movement.
The circuit connecting the exhaust fan in the bathroom
Blowing a hole in the form of window panes in the bathrooms often absent due to the fact that the windows in these rooms are not provided project. The remaining holes (vent recess openings or slots) in most cases are not capable of providing the necessary intensity of the supply air flows.
Conclusion - natural ventilation is not sufficient to form a proper microclimate in the bathroom or the toilet. Accordingly, for the ventilation of the premises, you must install artificial ventilation with forced air exchange.
Natural ventilation can ensure that there is a window in the bathroom of the private room of the house, but this is not available for the majority of residential bathrooms
Mechanical ventilation with forced air exchange
There are two types of mechanical ventilation:
- A combination of natural and forced air inflow drawing - so-called supply complex;
- Artificial and natural air flow removing it from the room - that is, the exhaust circuit.
Related article:
Ventilation in the apartment with a filtration. air stagnation indicators. Types and operating principles of ventilation in the apartment. Installing your own hands. Useful tips.
For forced air ducts should be equipped network through which are removed from the premises recycled air masses. To achieve the necessary to create a comfortable microclimate intensity of air flow, ventilation system equipped with such fans.
The yellow arrows indicate the movement of the exhaust air mass red - fresh air
Fan for the bathroom: Selection Criteria
Currently, the domestic market for construction products offers a wide range of ventilation devices of both domestic and foreign production. On what parameters when choosing an exhaust fan, you should pay attention to? Such parameters are: the performance, efficiency and comfort during use.
Performance
To properly determine which performance install a fan for the bathroom, you need to know the volume and rate of air space.
Exhaust fan is best installed closer to shower cabinWhere complicated natural air circulation
Index of air - is a value that shows how many times per unit time (per hour) should be replaced by air in the room. It is defined by sanitary standards and depends on the class and the purpose of the premises. Bathroom its value is 6-8.
Tip!A lower value of the indicator of air choose if 1-2 people live in an apartment more - if the bathroom regularly use 3 or more people.
To calculate a performance exhaust fan is needed, multiply the amount of space on the rate of air exchange.
Fan power is selected depending on the size of the room and bathroom visits intensity
economy
In addition to standard models, consisting of classical blades and switches can be found varieties of fans with additional features that enable cost savings electricity. The most common use of motion sensors and humidity, as well as timers.
The humidity sensor
The beginning and end of the fan, equipped with a sensor that depends on the level of humidity in the room. The fan is started or stopped when the humidity rises or falls to a certain, predetermined, values.
Such models are preferred when there is a need to save energy and to monitor its consumption.
fan control circuit using a temperature sensor and a humidity
Motion Sensor
Fans with motion sensor also contribute to energy savings, since react to movements in the room. Accordingly, they are included when in the bathroom or the toilet someone there, on and off, if there is nobody there.
The disadvantage of these models - the possibility of involuntary shutdown, if located in the bathroom "from the point of view of" the sensor moves rapidly enough. In addition, the time intervals during which the ventilation in the bathroom and toilet works, may be too short for a complete replacement of the exhaust air into the fresh.
Fan with motion sensor turns on automatically when someone walks into the room
Timer
A more appropriate solution to the problem of choosing between the need to save energy and to ventilate the room is a fan with a timer. Such a fan for the bathroom automatically turned on at a certain time and switched off after a specified period of time. The operating time depends on the amount of bathrooms and its usage.
fan control circuit using a timer
Comfort during use
The comfort of use of a fan depends on the noise level produced by them during the operation. Find a completely silent exhaust fan is impossible. But the sound, which publishes modern ventilation device does not create discomfort.
Fact!Noise from the most modern fan does not exceed 35 decibels.
The noise of most fans is in the range of 35 dB
Silent fan for the bathroom with a check valve: the main types and features of the installation
For the vertically arranged ventilation system in a building typical of the phenomenon of the "return" of the exhaust air. In this unpleasant smells, sometimes together with fine dust, from the channels to penetrate into the room.
To prevent this phenomenon, it is necessary to install in the bathroom exhaust fan with a check valve. The different models of the fan may be provided with additional sensors (humidity and / or movement) or timer.
There are two types of fans for bathrooms: axial and ducted.
The check valve prevents return of the fan exhaust air back into the room
axial fans
Ventilator Mechanism axial principle - a small propeller with blades which during rotation tightened humid air, bringing it into the pit. Such devices are suitable for bathrooms small volume (15 cubic meters), a non airshaft with other rooms. They provide a good quality of air, they differ low cost, but noisier than channel type fans.
Driving fan connector with built-in self-timer
Duct fans
Exhaust duct fan - more sophisticated device, which is a turbine volute placed in a plastic housing. Such an active fan sucks air inside, quickly and accurately airing room. Designed for bathrooms large area (more than 15 square meters) bathroomsAt downtroddenness natural ventilation channels.
Duct fans are appreciated for high performance, reliability and quiet operation. Their only drawback is relatively high cost.
Lack of proper ventilation in the bathroom leads to the appearance of mold and mildew
Special features
Install a ventilation device with a non-return valve in the best of the airway channel extraction bathroom or in the exhaust gateway entrance. These holes are usually located in a wall or ceiling in a corner opposite the entrance door.
Invoice model with axial fan mechanism is secured directly to the vent.
Steps 1 and 2: preparation and installation of vent fan housing
If you use a ventilation channel device, then it is inserted into the hole and closed with a decorative grid. It should be noted that channel fan virtually silent in operation due to the fact that its motor is located in the vent.
Steps 3 and 4: vent arrangement and installation of duct
To connect the device to set the power to lay cables from the nearest junction box (usually the one that over the door to the bathroom). It is necessary to observe the rules of electrification facilities with high humidity by placing the cable special protection channel and hiding it in a suspended ceiling, wall panels or under the layer plaster.
Steps 5 and 6: the fan electrical connection and installation of decorative lattice
Quite exhaust fan - is a simple but effective device that promotes a decrease in air humidity, air change and an increase in intensity increase comfort in the bathroom. Modern fans are easy to install and reliable in operation, equipped with automatic switching systems on and off, and the combination of practicality with the aesthetic external design allows you to use them in any interior.
