If there was suspicion that in the apartment the ventilation system is faulty – steadily smells of dampness, windows sweat and cry, on the walls the mold has begun to creep away, then it is possible to correct it in two ways – to call experts or to carry out check independently.
Ventilation check by own efforts
In house conditions the ventilation is checked by means of piece of toilet paper or napkin. Before check it is necessary to slightly open a little window or window leaf and to attach the paper to ventilating grate. If attracts it to grid, so ventilation is correct. If paper flies away in the apartment – the effect of reverse thrust works. If the leaf is attracted, but practically at once falls – the ventilating draft is insufficient. Instead of paper it is possible to use the burning candle, it is only necessary to bring it so that in ventilation pulled not flame but only smoke from candle. But under no circumstances it is impossible to try to carry out check in such a way if the house is equipped with the geyser.
At normally working ventilation the outflow of air has to be not less than three cubic meters an hour on each square meter of the apartment, in the presence of the geyser the kitchen ventilation has to provide outflow not less than 90 m3/h.
There is a little extreme measuring method of operability of vent system without specialized devices. Having densely closed all windows, it is necessary to fill with smoke all space of the apartment, for example, by means of smoke grenade or other make-shifts, to leave the apartment and having densely closed door, to note time for which smoke completely will extend to the air shaft. After that to separate the total amount of the apartment into the received time. The operability of ventilation system will also be result.
If have decided to call experts
Professionals carry out similar measurements by means of the special device - the anemometer and comparative tables in which the data obtained as a result of measurement are substituted. Measurements have to be taken at air temperature on the street not above +5os. Temperature difference between air in the apartment and outside for normal work of natural ventilation has to make not less 13-15os. At smaller temperature difference the ventilation will worse work, and in hot weather will not begin to work absolutely. Also the plastic windows established in the house which hermetically cork the apartment from air flow from the outside are the reason of nonfunctioning ventilation. In cases when the air shaft is serviceable, and ventilation in your apartment all the same does not work, or the volume of air exchange is insufficient, it is possible to build in the device of mechanical ventilation air vent. If problem in the general mine, then only experts can help with recovery of its working capacity, and it is not necessary to try to make it independently at all.