List the types of mechanical ventilation to save costs

November 11, 2022

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Mechanical ventilation types are widely used in cooling ventilation. And is applied to many factories, industrial zones or even buildings, livestock farms… Let’s find out the types of mechanical ventilation in this article.

From time immemorial, natural forms of mechanical ventilation have been used, such as the design of windows, doors, and vents to bring in air from the outside environment. However, for factories, workshops, or large areas, this method is not enough. Need to combine with natural ventilation and mechanical ventilation to bring the highest efficiency when used.

What will happen to the air-deficient environment?

In a larger environment, air conditioning becomes more difficult. They accumulate dust, pollutant emissions, and stagnant air. This results in poor interior air quality (IAQ). Lack of IAQ is a serious problem in any environment because they have a direct impact on human health and productivity.

According to a study by the US Environmental Protection Agency (EPA) as follows:

– The average person gets 72% of their home’s chemical exposure (home air quality).

– Indoor pollution levels can be 2 to 5 times higher than outdoor pollution levels. Maybe even more than 100 times.

– Large amounts of indoor air pollutants are of particular concern. Especially workers who often work in polluted environments.

– Indoor air pollution is a leading public health risk.

Lack of IAQ can lead to health effects. As mild as allergies, headaches, and asthma, in the long run, can lead to more serious diseases like liver and kidney diseases and even cancer. IAQ can also cause cognitive decline.

Cost-effective mechanical ventilation solution

To enhance the IAQ, it is best to balance ventilation and provide enough fresh air from the outdoors into the room. Dirty, stagnant air from the inside is brought to the outside. As a result, the environment inside the room achieves the highest quality, ventilation, and cleanliness and brings positive effects on human health.

Exhaust ventilation system

Exhaust ventilation systems are a type of mechanical ventilation, that works by reducing the pressure of a structure. Thereby changing the pressure inside the room compared to the outside, the wind from the outside is thus sucked and brought inside through the ventilation openings, windows, main doors…

The exhaust ventilation system is suitable for areas with cold climates with cool natural airflow. Because in a warmer climate, the decompression process can draw moist air into the wall cavities, causing condensation and not being able to escape.

Exhaust ventilation is a simple, cost-effective system that utilizes natural airflow. Usually just use an industrial exhaust fan in a central location, or better yet, connect the fan through the ductwork in places that regularly generate exhaust gases, dust, and pollutants.

Ventilation air supply system

Contrary to the exhaust ventilation system, the supply ventilation system is a way of using industrial fans to create pressure, pushing air from the outside into the room thanks to industrial fan equipment. The airflow inside the space will be leaked to the outside through the vents, windows, etc.

The ventilation supply system helps to bring clean air from outside into the house better than the exhaust ventilation system. This helps to dilute the air concentration inside the space, bringing dusty, stagnant air from inside to outside easily.

However, the ventilation supply system does not heat and does not remove dirty air from outside to inside. Therefore, when using this system, it contributes to increased heating and cooling costs compared to energy recovery ventilation systems.

Balanced ventilation system

A balanced ventilation system is designed to not pressurize or depressurize an indoor space. They take in and release an equal amount of air in and out. Thus the airflow is always balanced. Balanced ventilation systems typically use at least two industrial fans. A fan to bring the air from outside to the inside, and a fan installed to bring the air from the inside to the outside. Usually installed with 2 conduit systems.

A balanced ventilation system requires more equipment and accessories than the two ventilation systems above. So they can be more expensive.

Energy recovery ventilation

The energy recovery ventilation system helps control the air inside, minimizing energy loss. They help reduce the heating of ventilated air in winter by transferring heat from the warm exhaust air from the inside to the fresh (cold) supply air from the outside. And vice versa, in summer the air inside is cooled, which helps to reduce cooling costs relatively.

The above are some types of natural mechanical ventilation that help ensure limited IAQ deficiency. Because lack of IAQ is a dangerous threat to human health. The above mechanical ventilation methods, it helps to raise the IAQ and improve human health, ensuring a fresh and clean environment, and improving the quality of life.