What are the different types of building ventilation?

Building ventilation is the process of removing outdated air from the inside of the structure and its replacement with fresh air from the outside. This process is part of the heating, ventilation and air conditioning system (HVAC) of a building that is usually designed and installed by a mechanical or HVAC supplier. The ventilation of the building is measured in terms of air changes per hour (ACH), which is the percentage of air volume, which is removed every hour and replaced from the building. This can range from 0.5 ACH in a tightly sealed building up to 1.5 ACH in a freely designed house. When people perform basic metabolic processes, they release carbon dioxide into the air. Household objects such as color, furniture and floor often contain chemicals that can be out of gas. Ventilation of the building helps to remove chemicals and carbon dioxide and replace them with fresh air. Ventilation systems are also used to check the levels of moisture and reducing odors in the building.

natural ventilation systems do not require fans, HVAC and pipeline equipment. Instead, they rely on pressure differences between external and internal areas to help move the air. Pressure changes are constantly found in the building and can be caused by wind, temperature changes or human activities. The natural ventilation system of the building uses operable windows, blinds and grills to help the Air enter or get out of the building. While natural systems are highly efficient in creating air changes, they are not generally successful in controlling moisture levels, especially in warmer areas.

Mechanical ventilation systems use fans to draw fresh air inside and rely on HVAC pipes to distribute air throughout the building. Fresh air is known as "Supply Air" and passes through the air manipulation units of the building when it enters The Home. Since the air supply is blown into the room, the existing “return air” is forced into gasThe grid where it travels back through the pipeline network and is exhausted.

The type of ventilation system used in the building can have a significant impact on the energy efficiency of the structure. The natural ventilation system does not consume energy for the operation of fans or handling units of air, but allows heated or cooled air to escape open windows and air holes. Mechanical ventilation systems require energy to operate fans and equipment, but do not allow so much conditioned air to escape through ventilation holes or windows. The energy efficiency of each type of ventilation system should be carefully considered before selecting the system with the needs of the building ventilation.