How is the calculation of ventilation right?
It is difficult to perform calculation of ventilation? It is no secret that without ventilation, can not exist, no room, whether it’s a regular apartment or a huge production. In order to properly organize, it is necessary to conduct a series of calculations. It may seem too complex or confusing, but only at first glance.
How to do this procedure?
If you do everything in stages, there is nothing difficult that will be. For starters, we should not forget that the ventilation can be natural, i.e. that which is performed by opening Windows and doors, through cracks and pores in walls and air handling.
Moreover, natural ventilation is possible only in case if the building has channels-air ducts through which air can freely circulate. More warm goes up and cold goes down, as is circulation. In order to provide to the building fresh air duct and removal of waste, it is necessary to consider that at the stage of construction. We should not forget that, since the building without sufficient ventilation will become simply uninhabitable.
For starters, you need to understand how much air you need for a home. When designing it is important to consider what you will use those or other premises. If the house or apartment, you must arrange it so that fresh air came in first in the bedrooms, living and kids, and then, passing through the corridors, went out through the most contaminated – for example, a bathroom.
This will help to eliminate unpleasant smell in the room plan and provide a constant flow of fresh air to places of sleep and rest. First of all, you should determine the volume of air that needs to come into the room. It will help the norms of the SNiP, where the air exchange is calculated depending on how many people are planned in the room. According to these standards, the volume of air diverges in the range from thirty to sixty cubic meters.
In order to determine how many cubic meters of air must be multiplied by the air flow rate per person by the number of people in the room. That is, if a person need sixty cubic meters, and is planned with rooms for two, the required ventilation capacity is 180 cubic meters per hour.
Do not forget that the air in the room must not only join, but also constantly updated. It usually takes about an hour. If such expansion is not enough, it is possible to calculate an additional indicator. He will be called to calculate the ventilation ratio. It is necessary to multiply together the exchange under the rules (1-2 for residential and from 2 to 4-x for industrial premises) and the amount of space. The volume of the room is as the product of its length, width and height. And then both figures are added up and obtained the required output.
If natural ventilation is not enough, the air will remain stagnant, heavy, and will disturb unpleasant smells, you need to think about forced ventilation. It is usually installed in the bathroom and in the kitchen. Power the hood in the kitchen depends on what you use the stovetop.
If it is electric or two will be enough hoods with a capacity of sixty cubic meters per hour if the stove has four burners must be not less than ninety cubic meters. The same you can recall about the bathroom. If the bathroom and toilet are in different rooms, will be enough hoods with a capacity of twenty-five cubic meters per hour, if they are common, it is necessary to increase the capacity by half.
If ventilation becomes excessive, there may be unwanted heat loss, so it will need to compensate for the supply. Such a system will be called forced ventilation. The indicators and the other just needs to be balanced between the supply and takes the air, then the room will be ideal. If you want to calculate the ventilation of premises with high load, factory, hospital etc it is better to invite professionals, since such work requires certain skills and adherence to sanitary norms.