Designing ventilation

A common mistake of many - is the installation of air conditioning in the house and complete disregard for forced ventilation. Unfortunately, not everyone knows that the air conditioning - it's just his cleansing, and above all, cooling, but not oxygen enrichment! Split systems are only able to filter the air from unpleasant odors, dust, but nothing more. During operation of the device does not come from outside to fresh air. It turns out that the air-conditioner in the heat reception, the room cool, but carbon dioxide is through the roof!

To avoid this, be sure to take care of ventilation at home, apartment or office. If we consider the scheme of ventilation for the cabin, it will consist of air-intake shaft, supply and an exhaust fan, intake and exhaust channels, supply and exhaust chambers, heaters, dust chamber, and the droplet separator filters. Every designer knows that the calculations necessary to observe all the rules.

Calculation of ventilation

Of course, it is easier to apply to the company for the installation of ventilation, so experts have completed all measurements and calculations, and simultaneously conducted installation of ventilation in the room. By the way, in the future these same masters will engage ventilation service. But sometimes you want to do it yourself, for example, in order to save. So, how well do the calculations? In all cases, the design of ventilation has its own nuances. For each type of room has its own rules.

First you need to determine the fan capacity. From this element depends on the amount of air supplied into the room. This takes into account the number of people that are in it will be. For example, if we talk about the offices, then the formula will be as follows: 60 m3 / h at the rate of one employee x the number of people in the office.

As for the apartments, the calculation of the ventilation is somewhat different. Used data on the size of the room. You must multiply the volume of the room 2-3 times. When an area of ​​20 m2 and a ceiling height of 2.5 m, the calculation would be: 20 x 3 x 2.5 = 150 m3 / h.

In any case, the exhaust fan power should be somewhat smaller than the power of forced. If the device is required ventilation in a restaurant or hotel, the number of people is recommended multiplied by 60 m3 / h. However, if smokers have to increase the power of the fan several times. The same applies to production areas with polluted air.

The radiator grille and

In addition, you must also calculate the power of the heater. This value will be equal to the air flow in cubic meters per hour, multiplied by 46 and divided by 3.46. This is a measure of how the temperature in the air heater is increased. For example, 2000 m3 / h x 46/3 = 30 kW. (2000 m3 / h - fan power).

It would seem that may be easier than the calculation of lattice? However, if you take the bars at random, it is possible sharp sound of air coming out of it. Thus, S = grille air flow per hour / 3600/2. Two of mean air velocity in m / s, which passes through grating. Thus, when the air supply 200 m3 / h, S = 200/3600/2 = 0,028.