Do I need ventilation in a country house

Ventilation in the house - a system of outflow channels and air flow, which allows to control its quality.Its arrangement takes a lot of time and cost is not cheap.On the one hand, the presence of modern technological devices that make up the group of climate control, designed to replace the standard ventilation, but on the other hand, only using these air ducts provided "healthy" climate.

Why ventilation in a private house?

In order to deal with this issue, you should turn to chemistry.Air - a combination of gases in which oxygen is used by a person breathing is just over 60%.The remaining compounds are either useless or even harmful.After the person inhales air, filtered light necessary for life support part and the rest reject.Gasps people have carbon dioxide.Hence, no fresh air in the room continually reduced oxygen level.It causes weakness, dizziness or pain in your head.

The next important point is biological.Air - this is an ideal habitat for many viruses and bacteria.They can be stored for a long time in a latent form, and does not manifest itself, but if the person breathes in the germs, they actively begin breeds causing poor health.Especially dangerous viruses for children, because their immune system has not yet formed.Without ventilation, the number of microbes in the air will continue to increase after each cold.This will eventually lead to the fact that people will be sick all the time.Average ventilation windows can not solve this problem.

Akin viruses and dust.While dust particles are not biologically active, they are quite badly affect the respiratory system.Settling on the lungs, dust particles create a tight cover which makes breathing difficult degrades the inflow and outflow of blood to the lungs, as a consequence of human activity is greatly reduced, there is chronic cough.Unlike the common cold, to treat such a disease is much more difficult.In some cases the damage is so great that completely get rid of the effects of inhalation of dust can not be regular.

lack of ventilation is bad, and at the house.First of all it is connected with the appearance of mold and mildew.One of the properties of the air is the ability to accumulate moisture.These same properties exist in the rock from which built the house walls.During normal ventilation air takes away excess moisture in stone, but if there is no ventilation, the stone begins mokret.This leads to its destruction and the emergence of the fungus.No less unpleasant moment - cracks in the walls and ceiling.

All these factors necessitate ventilation, but before installing a particular system, you need to get acquainted with its advantages and disadvantages.

ventilation system in the house

In global terms, the ventilation systems are divided into:

• active,
• passive,
• air handling.

Active ventilation - a system of air channels which allow air exchange by means of electric fans.It consists of the supply channel and the branch ducts.The inflow of air is carried out by natural, by special protective filters that pass only clean air.The filters are installed directly into the wall of the house.Tap-off channels are equipped with fans that draw air and displays it on the street.It should be noted that the system consumes a lot of electricity and its maintenance cost is quite expensive.

more economical option - passive ventilation.It works on the principle of the chimney.Fresh air is drawn out of the windows or doors open, and removed through the hood in the wall.Is actually run only when the extraction channel length greater than 5 meters. Another disadvantage is that ventkanal installed in each room separately.Thus, the system to work, the roof needs to be done like a hedgehog.

Attempts to combine efficiency and practicality led to the emergence of air handling systems.They consist of:

• distributor block,
• filters inflow channels,
• outflow channels,
fan
• .

block valve is a mechanism in which the installed fans.The block is divided into two parts, one used for inflow and distribution of fresh air and the other - for the outflow.

Unlike the active system, the entrance channel with only one filter.Fan operation provides the necessary air flow, which is then distributed evenly through all the rooms.Output channel, as opposed to the passive system, and only one, because the exhaust air is blown into the street and removed by a fan.

only drawback - a very extensive system of air ducts, which it is desirable to hide inside the walls.If the work is carried out after the completion of the home, you will need a major overhaul.However, forced-air ventilation is the most effective and economical.

ventilation device in the house

Unlike apartments homes are different layout, area and number of floors.These factors affect the device and the ventilation system in each case involve the calculation of the required capacity.Calculation of the house ventilation is calculated based on the following parameters:

• breathability,
• floor space,
• hygiene regulations,
• multiplicity.

Air exchange involves a certain amount of air that must enter the room to ensure that the environment, comply with generally accepted standards.In order to get acquainted with this concept in more detail, it is necessary to study the construction ghosts associated with ventilation of residential and non-residential premises.

In accordance with building regulations, the rate of supply of fresh air is 3 cubic meters.m per hour per 1 sq.m. However, this quantity is arbitrary, since the same area, the volume of rooms with different ceiling height will be different.When calculating the ventilation this parameter is used as the minimum acceptable.

hygiene standards relating to types of filters and air humidity.They are all clearly defined in accordance with GOST.In addition, it sets 60 standard cubic.meters of fresh air per hour per person, which is always in the room and 20 cubic meters.m. for temporary stay.Permanent should be considered as being in the room for more than four hours.

DBN V.2.2-15-2005 "Residential buildings" results table multiplicities.This conditional values ​​which demonstrate the necessary parameters of air.With their help, as calculated conditional ventilation parameters.

Proper ventilation in a private home - it's quite a complex mathematical process.These parameters are only starting points.For accurate calculations require special skills and knowledge.Unfortunately, not all companies that provide settlement services to ventilation, are competent in this matter.Therefore it is necessary to know the general formula by which the proposed option compared with the standard.The Standard Formula is because it takes into account only the ideal value without considering the peculiarities of the region, plan, wall material and the number of storeys.Consider its maximum detail.

first postulate quality, reliable ventilation - the volume of incoming air must be equal to the volume of exhaust air.The quantity is usually denoted by Latin letter L. Therefore, in general, the formula looks like this: = Lpr Lvyt.

Lpr - a collection of standards, is calculated as follows: (+ Sh3 nh60 the V + / 2) / 3.Under S should be understood area of ​​the premises under the n - the number of people who reside in the house under V - volume of the room.

How it works in practice: let us assume that there is a room of 20 square meters.m. and a ceiling height of 3 meters, while living in a house 4 persons.In this case (20X3 + 4H60 + 60/2) / 3 = 110 cc.m / h.

What does it mean?Specifically for this room air supply should be equal to the calculated value, and the parameter is the minimum acceptable.Humidity factors rise, gas content of the atmosphere will only increase the calculated value, but the less it can not be.In addition, the results will determine the required power of the fan.

worth noting that the arrangement of the ventilation should be dealt with by professionals, since no special training is impossible to precisely determine the throughput capacity of the ventilation system.The formula is valid only to check the professionalism of the chosen company.In addition, any large company provides all calculations and estimates of works free of charge.