Ventilation System and its Types

Services for Real Estate Pros with Twin Cities


Ventilation is the movement of air in a room. The air inside the room is filled with various substances like carbon dioxide, dust, chemical emissions from objects, animal hair, etc. This polluted air moves to the hood and is led out through it. At this time, a new portion of fresh air enters the room from the outside, which will also go into the hood. This whole process is called ventilation.

Why is ventilation necessary?

Ventilation can be necessary and useful in various methods. Here we are describing two of the major factors.

1. To Normalize the level of carbon dioxide

Carbon dioxide is always present in the room: we exhale it! The only question is what its quantity is? Excessively accumulating, carbon dioxide harms the human body. It interferes with the full supply of blood and organs with oxygen. The brain begins to “be lazy,” and we feel tired, lethargic, becoming inattentive. A feeling of stuffiness is also associated with a high concentration of carbon dioxide.

Good ventilation ensures constant air renewal. Air coming from the street replaces the air in the room with the carbon dioxide accumulated in it. It is not stuffy and comfortable to be in such a room.


2. To Normalize the Humidity

Proper ventilation assumes that excessively moist air from the premises leaves the hood promptly. This eliminates the formation of ever-moist areas in the corners and on the walls where mold is actively growing.

The ventilation system may also have additional features. For example, air filtration eliminates pollution from the air at the entrance to the room and makes the air healthy and safe. And the heating function in ventilation prevents the danger of catching a cold from cold air from the street.

Types of ventilation systems by parameters.

Classification of ventilation equipment by various aspects. However, you can choose according to your space that which method will be suitable at your side.

  • By the method of air circulation: natural and forced (mechanical)
  • By design: ducted
  • By appointment: supply and exhaust
  • For additional functions: heated ventilation and filtered ventilation

1. By the method of air circulation:

Natural Ventilation

Most of our residential buildings have natural ventilation. This means that the air enters the building from the street by itself, without any special equipment or artificial pumping. Usually, it enters homes through leaks in walls and windows, as well as through doors, and it goes through the hood. The exhaust holes are usually located in the kitchen and bathroom. Air from the room is drawn through them into the ventilation shaft and is thrown through the roof.

Natural ventilation works due to temperature differences and pressure differences inside and outside of the room. The main advantage of natural ventilation is its availability.

But there are also disadvantages. Firstly, the natural ventilation system easily malfunctions. Secondly, there is only one way to properly ventilate by opening a window which can bring noise, dust, pollen, cold and unpleasant odors.

To eliminate these shortcomings, natural ventilation must be replaced or supplemented by mechanical (forced) ventilation.

Forced Ventilation

Forced ventilation is a system in which air stably and continuously enters the room, regardless of external weather conditions. Air is forced into the room by fans or other equipment built into the system. Forced ventilation allows you to adjust the flow rate.

Forced ventilation usually does not require human intervention, additional opening and closing of windows, which makes it most convenient for domestic use.

2. By Design:

Duct ventilation

Such systems are laid and mounted during construction or overhaul. They, as a rule, provide both inflow and exhaust of air at the same time.

How is duct ventilation arranged?

Firstly, there is a central air treatment unit (cleaning, heating, conditioning, and humidification). Secondly, air ducts stretching under the ceiling from the central unit. Such ventilation systems require a lot of free space for installation. 

Such a ventilation system is found in offices, hospitals, warehouses, restaurant kitchens, and shopping centers.

3. By Appointment                                          

Supply Ventilation

Supply ventilation provides air from the street to the room.

For this purpose, you can use:

  • Ventilator
  • Supply valve
  • Breather

Exhaust Ventilation

Exhaust ventilation is the process of installing a fan in the exhaust hole. The ventilation performance for the hood will depend on the area of your kitchen or bathroom where the fan is mounted.

4. By Additional Features:

Heated ventilation

If minus temperatures outside the window are common, then forced ventilation with air heating is needed. Otherwise, cold air will blow into the room and this can easily result in cold. Heated ventilation can have a climate control system and automatically heat the air to a temperature selected by the user.

Filtered ventilation

Clean air is an important condition for a healthy lifestyle. Filtered ventilation contains air filters that trap harmful gases and odors.

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