Bathroom, as a room with high humidity, makes special demands on ventilation. In other words, the airing in it should be constant and intense enough to create and maintain a healthy microclimate. There is a device that meets these requirements almost completely – a silent bathroom fan with a non-return valve.
Why do I need a fan in the bathroom?
Why is installing this type of fan for the hood in the bathroom is one of the best solutions? Special requirements in the field of ventilation of rooms with a wet microclimate are as follows:
- ventilation must ensure air circulation;
- normalization of humidity in the room.
Fact! 25 m? / Hour for a separate bathroom and 50 m? / Hour – for combined. This should be the intensity of the air flow for the optimal operation of natural or artificial ventilation of bathrooms and toilets.
The increased humidity in the bathroom creates an atmosphere conducive to the appearance and growth of mold and fungi, which leads to the destruction of the walls, the ceiling, the floor and their coatings, and the deterioration of furniture. Even waterproof equipment is preferable to operate in a dry atmosphere: this ensures safety and increases its service life.
Musty air creates health problems. Also in a wet bathroom insects can be got. Finally, odors from the ventilation ducts are just annoying. All this leads to a decrease in the level of comfort and a deterioration in the standard of living in a single room.
There are two main types of room ventilation:
- Natural supply and exhaust.
- Artificial, with forced air.
Natural forced-air ventilation is one of the typical solutions to the problem of air exchange in most modern buildings, both apartment buildings and private ones. The system operates using a combination of air inlets and exhaust sluices. Air vents are windows in the windows, ventilation holes in the lower part of the doors, and a gap between the door and the floor. Exhaust holes are designed as vents in the upper part of the walls, near the ceiling, or on the ceiling itself.
The quality of the natural ventilation and exhaust ventilation depends solely on the thrust in the exhaust ducts, which is created by the difference in pressure inside and outside. Traction is created due to several factors:
- the flow of air into the room from the outside;
- air temperature inside and outside. The air exchange rate decreases with increasing outdoor temperature;
- the possibility of unimpeded movement of air masses through the exhaust channels. Dirt, dust, cobwebs, which over the years accumulate in the hood, impede the movement of air.
Air inlets in the form of window vents in the bathrooms are most often absent due to the fact that the windows in these rooms are not provided for by the project. The remaining openings (vents, openings or slots) in most cases are not able to provide the necessary intensity of supply air.
Conclusion – natural ventilation is not enough to form the correct microclimate in the bathroom or toilet. Accordingly, for ventilation of these rooms it is necessary to install artificial ventilation with forced air exchange.
There are two types of artificial ventilation:
- The combination of natural inflow and forced air pulling is the so-called inflow complex;
- Artificial air supply and its natural removal from the room – that is, exhaust scheme.
Forced ventilation in the apartment with filtration. Indicators of air stagnation. Types and principles of ventilation in the apartment. Do it yourself installation. Useful tips.
For forced air exchange, a duct network must be installed through which recycled air masses are removed from the room. In order to achieve the intensity of air flow required to create a comfortable microclimate, such a ventilation system is equipped with fans.
Currently, the domestic market of building products offers a wide range of devices for air ventilation, both domestic and foreign production. What parameters, choosing an exhaust fan, should pay attention? These parameters are: performance, efficiency and comfort during use.
To correctly determine what performance to install a fan for a bathroom, you need to know the volume of the room and the rate of air exchange.
The air exchange indicator is a value that shows how many times per unit of time (in one hour) the air in the room should change. It is determined by sanitary standards and depends on the class and purpose of the room. For bathrooms, its value is 6-8.
Tip! The smaller value of the air exchange indicator is chosen if there are 1-2 people living in the apartment, and a larger one if 3 or more people regularly use the bathroom.
To calculate what performance exhaust fan is needed, you need to multiply the volume of the room by the rate of air exchange.
Along with the standard models, consisting of classic blades and a switch, you can find varieties of fans with additional features that make it possible to save energy consumption. The most common use of humidity and motion sensors, as well as timers.
The beginning and end of the operation of a fan equipped with this sensor depends on the level of humidity in the room. The fan starts or stops when the humidity of the air rises or falls to certain, predetermined values.
Such models are preferred if there is a need to save electricity and monitor its consumption.
Fans with motion sensors also contribute to energy savings, as they react to movements in the room. Accordingly, they are turned on when there is someone in the bathroom or toilet, and are turned off if there is no one there.
The lack of such models is the possibility of involuntary switching off, if the sensor in the bathroom “from the point of view” does not move sufficiently intensively. In addition, the intervals during which the ventilation in the bathroom and toilet works can be too short to fully replace the exhaust air with fresh air.
A more suitable solution to the problem of choosing between the need to save energy and ventilate the room is a fan with a timer. Such a fan for the bathroom automatically turns on at a certain time and turns off after a specified period of time. The time of work depends on the volume of the bathroom and the intensity of its use.
The comfort of using a fan depends on the level of noise produced by it during operation. Find completely silent exhaust fan is impossible. But the sound that makes modern ventilation devices, does not create discomfort.
Fact! Noise from most modern fans does not exceed 35 decibels.
For a vertically arranged ventilation system in a high-rise building, the phenomenon of “return” of exhaust air is characteristic. At the same time, unpleasant odors, sometimes together with small debris, from the channels penetrate into the room.
To prevent this from happening, it is necessary to install an exhaust fan with a check valve in the bathroom. At the same time, various models of such a fan can be equipped with additional sensors (humidity and / or movement) or a timer.
There are two types of fans for bathrooms: axial and duct.
A fan with an axial mechanism is a small propeller with blades that, when rotated, draw in moist air, leading it to the shaft. Such devices are suitable for sanitary facilities of small volume (up to 15 cubic meters), not connected by one ventilation shaft with other rooms. They provide good quality ventilation, differ in low cost, but more noisy than duct type fans.
An exhaust duct fan is a more sophisticated device, which is a turbine with a cochlea placed in a plastic case. This fan actively sucks the air inside, quickly and efficiently ventilates the room. Designed for bathrooms of a large area (over 15 square meters), combined bathrooms, with clogged channels of natural ventilation.
Channel fans are appreciated for high performance, reliability and quiet operation. Their only drawback is the relatively high cost.
It is best to install a ventilating device with a check valve in the air outlet duct of the bathroom or at the entrance to the exhaust air lock. These holes are usually located in the wall or on the ceiling in the corner opposite the entrance door.
The mounted model of the fan with an axial mechanism is fixed directly in front of the vent.
If a channel ventilation device is used, it is inserted into the hole and closed with a decorative grille. It should be noted that the duct fan is virtually silent during operation due to the fact that its engine is located in the ventilation hole.
To connect the installed device to the electrical network, they lay a cable from the nearest junction box (most often the one above the door to the bathroom). At the same time, it is necessary to follow the rules of electrification of rooms with high humidity, placing the cable in a special protective channel and hiding it behind a suspended ceiling, wall panels or under a layer of plaster.
The silent exhaust fan is a simple but effective device that helps to lower the humidity of the air, increase the intensity of air exchange and increase the comfort in the bathroom. Modern fans are easy to install and reliable in operation, equipped with automatic on and off, and the combination of practicality with aesthetic appearance allows them to be used in any interior.