Air purifiers excel at cleansing air from dust, odors, harmful bacteria, and allergens effectively.
Key Factors to Consider When Buying an Air Purifier
Here are some essential criteria to ensure you pick the best air purifier suitable for your needs and space requirements.
1. Choose an Air Purifier that Matches Your Needs
Understanding Air Purifier Types: Choose from Car, Room, or Whole House Options.
- Car Air Purifier: Compact design, runs on 12V power with about 6W capacity. Effectively eliminates bacteria and odors for a fresher ride.
- Room Air Purifier: The most popular type on the market, widely used by many.
- Whole House Air Purifier: Typically higher capacity and higher priced.
2. Assess Air Quality, Humidity, and Dust Levels.
Consider your environment to make the appropriate choice. For high-altitude or humid areas, opt for ionizing models to reduce moisture.
In hot climates with lots of dust, choose air purifiers with humidifying capabilities to enhance living conditions.
3. Noise Level Considerations
When purchasing an air purifier, noise level is one of the crucial criteria that you shouldn't overlook. The noise level of the machine ranging from 0 – 50dB is considered to be quiet, gentle, and suitable for human health standards.
4. Room Size and Capacity
Depending on the size of the room, you should determine the most suitable usage capacity. It's important to choose the appropriate capacity to avoid wasting power as well as insufficient ability to clean all the air in the room. Here's the recommendation:
- For a 15m2 room, consider a machine with an airflow rate of around 160m3/h.
- For rooms ranging from 15m2 – 20m2, consider a machine with an airflow rate of around 180m3/h.
- For rooms ranging from 20m2 – 30m2, consider a machine with an airflow rate of around 240m3/h.
- For rooms ranging from 30m2 – 40m2, consider a machine with an airflow rate of around 360m3/h.
- For rooms larger than 40m2, opt for a machine with an airflow rate of 510m3/h.
5. Filters of the Machine
The filters of an air purifier depend on the price, functionality, and brand supplying the product. Therefore, when choosing an air purifier, you need to pay attention to having pre-filters, intermediate filters, and Hepa filters.
Top Air Purifiers to Consider
Still unsure which air purifier to buy? Let's take a look at some suggestions below.
1. Xiaomi Smart Air Purifier 4

The Xiaomi Smart Air Purifier 4 features a compact design, elegant white color suitable for various spaces. With a coverage area of up to 48m2 and an airflow rate of up to 400m3/h, it allows you to use it effectively in many spaces, effectively purifying the air.
The Xiaomi Smart Air Purifier 4 is capable of removing up to 99.97% of particles in the air with a size of 0.3 micrometers as well as filtering out fine dust PM2.5, pollen, pet dander, and smoke. Air quality, temperature, and humidity sensors with high accuracy via the LED display make it easy to monitor the indoor air conditions.
2. Electrolux FA31-202GY Air Purifier

The Electrolux FA31-202GY boasts a modern design, luxurious color scheme, and compact size, making it easy to use in any space. Operating with a power range of 3.5W – 20W, it efficiently filters air in rooms up to 26m2, suitable for small to medium-sized spaces like bedrooms, living rooms...
The Electrolux FA31-202GY air purifier operates effectively with 3 filtration stages: pre-filter, activated carbon filter, and Hepa 13 filter, capable of filtering and eliminating up to 99.99% of dust, harmful substances in the air. The spiral air outlet system with a flow rate of 203m3/h quickly provides clean air circulation throughout the room.
3. Sharp FP-J40E-W Air Purifier

The Sharp FP-J40E-W features a neat, modern design, easy to move and install. It works well for spaces under 30m2. The Sharp FP-J40E-W operates quietly with a noise level ranging from 15 – 45dB, providing comfort to the environment.
The Sharp FP-J40E-W air purifier with 3 layers of dust filtration ensures a healthier, cleaner indoor environment for families. The approximately 4cm thick Hepa filter can remove dust, bacteria, allergens with a size of 0.3 micrometers and above, preventing PM2.5 dust.
With the information in this article, do you now know which air purifier to buy? Hopefully, this article has provided you with useful information to choose the best product.