Ventilation Systems

First of all, we should know the definition of ventilation, then, the different types of ventilation. In this article, 5 different types of ventilation has been explained. If you are looking for expert technicians in order to ventilation repair in Montreal, follow this link.

Ventilation

Ventilation is the process of moving outdoor air into the building or a room and circulate it in the area. The fresh air will dilute the inside polluted air, and also it will be replaced by some of the contaminated air. The primary purpose of ventilation is to prepare healthy air for the breathing of people in that place.

Five Types of Ventilation

5 Types of Ventilation include:

·        Natural Ventilation

·        Mechanical Ventilation

·        Hybrid Ventilation

·        Spot Ventilation

·        Task Ambient Conditioning (TAC)

 

 In the following, each type is explained:

Natural Ventilation

Natural ventilation systems depend on natural forces such as wind and thermal buoyancy to drive outdoor air throughout the building’s openings. Three factors play roles for natural ventilation to work. These factors are climate, human behavior, and building design. During the design of a building, the designer should provide some purpose-built openings such as doors, windows, solar chimneys, wind towers, and so forth. If these openings work correctly, a natural ventilation system helps to reduce energy consumption.

When we talk about natural ventilation, one may think of simply opening the windows of the room. Nevertheless, it is more complicated than it seems. In some particular locations whose outside contamination is more than that of the inside, natural ventilation may work conversely. It will not only ventilate the air inside the room but also will pollute it. The polluted air can enter the building through openings and put our health at risk. Due to the fact that there is no considerable control while using natural ventilation, it is being replaced by mechanical ones in most cases.

Mechanical Ventilation

Mechanical fans conduct mechanical ventilation. Fans can be installed in windows or walls directly or in air ducts to supply air to or from the room.

The type of mechanical ventilation used depends on the weather. For example, in hot and humid climates, it may be necessary to minimize or prevent intrusion rather than interstitial compaction (which, when hot and humid air penetrates a wall, ceiling, or floor from inside a building with a cold surface Encounters) prevent. In these cases, a positive pressure mechanical ventilation system is often used. Conversely, in cold climates, exfiltration should be avoided, and negative pressure ventilation should be used to prevent intermediate condensation. A negative pressure system is often used for a room with locally produced pollutants, such as a bathroom, toilet, or kitchen.

In a positive pressure system, the room is under positive pressure, and the room air leaks out through a leak in the envelope or other openings. In a negative pressure system, the place is in negative pressure, and the room air is compensated by “sucking” the outside air.

Hybrid Ventilation

Among various types of ventilation, Hybrid ventilation (mixed mode) depends on natural driving forces to prepare the desired flow rate (design flow rate). When natural ventilation has a very low flow rate, the role of mechanical ventilation is prominent.

When natural ventilation is not acceptable alone, exhaust fans can be installed to increase the ventilation rate. These have enough pre-testing and planning in order to work properly.

An example of mixed-mode is in rooms that accommodate patients with airborne infections. However, this simple type of combined ventilation (mixed mode) should be used with caution. Fans should be installed where room air can directly throw out to the outside environment through the wall or ceiling. The amount of targeted ventilated air specifies the size and number of outlet fans, which should be measured and tested before use.

Spot Ventilation

Another kind of type of ventilation is spot ventilation. In order to improve the effectiveness of both natural and mechanical ventilation systems, spot ventilation came into existence. In other words, it is better to say that it is an auxiliary system. This involves deploying local exhaust fans, the same as those used in the bathrooms or kitchens. It removes the moisture and inside air pollution at its source, and as a result, it improves the usefulness of the ventilation system.

Task Ambient Conditioning (TAC)

Task Ambient Conditioning (TAC) is one of the other types of ventilation. The ideal temperature and comfort level depend on individuals. While some people complain of overheating, the others may feel that the temperature is somehow cold. The traditional ventilation systems cannot meet one’s preferences. That is where the task-ambient conditioning plays its role. This relatively new technology regulates the airflow in a space.

In different types of ventilation, each type has a special principle of work. To demonstrate its principle, it changes the airflow, and then a person’s perception of comfort will change, regardless of the central temperature. In task ambient temperature, the warm air flow is responsible for heating, and the cold air flow does the cooling. Consequently, the average temperature in hot places can be set higher than the comfort zone and save more energy in this way. People wishing more cooling increase the airflow while those who prefer to be warm reduce the airflow or divert it.

Source: https://www.linquip.com/blog/types-of-ventilation/