How to Improve the Air Quality of Underground Garages?

The air quality in underground parking lots is generally bad due to the production of harmful gases and the humid and dark environment. This article will focus on the generation and treatment methods of carbon monoxide and moisture problems.

 

Hazards and treatment methods of carbon monoxide in underground parking lots

Carbon monoxide is colorless, odorless, and tasteless. Inhalation can cause significant harm to the human body as it combines with hemoglobin to form carboxyhemoglobin, leading to hypoxia. Common symptoms of carbon monoxide poisoning, such as nausea, vomiting, dizziness, fatigue, and a feeling of weakness, may cause serious damage to the heart and nervous system when exposed to carbon monoxide, leading to sequelae.

The production of carbon monoxide in underground garages mainly comes from car engines. When the engine is idling, due to insufficient combustion of gasoline, a large amount of CO containing exhaust gas will be produced. Underground parking lots are enclosed environments where vehicles frequently enter and exit, and the exhaust emissions are difficult to release. This can easily accumulate a large amount of CO gas, causing a pungent odor to pervade the parking lot and harming human health. Therefore, underground garages and parking lots should be equipped with air supply and exhaust systems to replace with fresh air.

 

Reason for the dampness in underground parking lots

There are many reasons for the dampness of underground parking garages. Firstly, during the rainy season, there is a large amount of precipitation that lasts for a long time. Vehicles driving into the garage from outside will carry rainwater, causing the ground to become slippery. Secondly, the walls and floors of the basement are prone to moisture regain during seasons of high humidity. As the temperature rises and the relative humidity in the air increases, water vapor in the air condenses on the ground surface when it cools, causing the garage to accumulate moisture and become increasingly humid. Just like pouring ice water into a glass, there is a temperature difference between the inside and outside of the glass, and the air contains water molecules. After a few minutes, water droplets appear on the surface of the glass, which is a physical phenomenon.

 

Wet treatment plan for underground garage

1. Lay anti-skid mats on the ground

If there is already water accumulation on the basement floor and the air is particularly humid, anti slip preparation should be started at this time. According to the size of the ground, purchase anti slip pads and lay them in the area between the basement and the elevator to ensure the safety of the owner's walking.

 

2. Use floor scrubber to absorb the accumulated water on the ground

Every morning, use the floor scrubber to clean the damp and severely damp basement road surface. The water absorption and cleaning functions of the floor scrubber are turned on at the same time, and once the floor is turned around, there will be no water stains, which can prevent pedestrians and bicycles from slipping. After cleaning each corridor one by one, the damp floor improved significantly. Continue to cycle and wash the floor in the afternoon to absorb water.

 

3. Turn on the exhaust fan and open the air defense door

Turn on the exhaust fans one by one every day, and as the exhaust fans start, the areas with air vents become noticeably drier.

Because there are many civil air defense doors, one by one they are closed, and the air does not circulate. Open the civil air defense doors and fire doors in the hallway to achieve air circulation and improve the humidity in the basement.

 

4. Clean the mold spots on the ceiling of the garage

Due to the moisture in the basement, water droplets were generated on the walls and ceiling of the elevator lobby, causing mold to grow on the ceiling. Black mold stains are harmful to the body, affect environmental aesthetics, and damage building structures. Professional personnel are needed to carry out removal and cleaning of mold stains to restore the ceiling to its original state. Provide homeowners with a comfortable and reassuring living environment.

 

5. Repair the seepage and remove the surface water on the ground
The seepage of the underground road surface has caused long-term water accumulation in certain areas and increased the humidity underground. A construction team has been hired to urgently repair the seepage of the underground road surface.

 

6. Use dehumidifiers

In some heavily damp corridors, mold stains may repeatedly appear after cleaning. In order to solve the fundamental problem of basement moisture, the property service center needs to purchase multiple dehumidifiers to improve the humidity level of the basement. Based on the size of the area, it is recommended to use a garage dehumidifier with drain hose. Suppose there is a moisture problem, but it is not serious. In that case, multiple mobile industrial machines can be used to turn on for 2-3 hours a day at regular intervals, reducing the indoor humidity to between 40% -50%, which can greatly reduce the probability of mold formation. If the humidity problem is severe, a ceiling mount dehumidifier can be connected to the ventilation duct. Simultaneously turning on the exhaust fan and dehumidifier every day can greatly improve dehumidification efficiency, effectively ensuring air circulation in the basement and maintaining appropriate humidity.

 

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