If the calculation of natural ventilation is done correctly, you will get a well-ventilated comfortable room. And for designing a high-quality and reliable system, it is very important to take everything into account correctly. Depending on how the ventilation is calculated, as well as on compliance with all standards, it is possible to provide the room with the necessary amount of air. And this will create the maximum comfort of living in the house, even if natural ventilation is not arranged well.
What is ventilation calculation?
Every home needs good ventilation. Its calculation is the determination of the operating parameters of all system elements. The correctness of such work will affect the efficiency of the entire system. The calculation process has its difficulties, and now we will look at what it is.
Where to start?
Calculation of ventilation should always begin with the designation of the desired parameters. This is the purpose of the room, the number of people in it, the number of appliances that generate heat. If we add up all these values, we get the air capacity of the room. This indicator will help determine the multiplicity of air volume - the number of timeswhen the air in the room is completely replaced in one hour. For residential premises, the required air exchange rate is one, but for working premises, 2-3 will be required. For all rooms, according to the air exchange rate, all values compose air productivity, the usual values \u200b\u200bof which are:
– offices – 1000-10000 m3/h;
– apartments – 1000-2000 sqm3/h;
– cottages – 100-800 m3/hr.
We carry out the necessary measurements
You will also have to calculate the power of the heater. The desired room temperature as well as the lower outside temperature are taken into account. In addition, when choosing equipment, consider the operating pressure that the fan creates, the permissible noise level and the required air flow rate.
Designing an air distribution network
Now you can proceed to the second stage - the design of the air distribution network. It includes air ducts, adapters, air distributors, etc. In this case, the diameters of the air ducts and the number of transitions between different diameters will be of great importance. The higher these figures, the greater the working pressure. For those who are not very well versed in this terminology, as well as in the features of the construction of ventilation systems, we present the formula. It will help to calculate ventilation: the fan power in the apartment should be equal to the volume of the room, multiplied by two. Keep in mind that in the case of an office space, one person should be allocatedone hour 60 cubic meters of fresh air.
Find optimal solutions
The diameter of the air ducts determines the average air flow rate. It, as a rule, should be 12-16 mm / s. When designing a ventilation system, it is important to find the optimal relationship between noise level, fan power and duct diameters. When calculating the power of the heater, take into account the desired temperature in the room, the lower level of air temperature outside. For apartments, the average heater power is in the range from 1 to 5 kW, and for offices, the limits are from 5 to 50 kW.
As you can see, calculating ventilation is a complex process, and if you are not sure that you can handle all its intricacies, it is better to contact specialists.