How to calculate the air volume of fresh air system
As people's attention to indoor air quality continues to increase, fresh air systems, as an effective tool to improve indoor air, have received widespread attention. Recently, discussions about fresh air systems across the Internet have mainly focused on how to calculate air volume, purchase guides, and installation precautions. This article will focus on the topic of "How to calculate the air volume of the fresh air system", combined with hot topics in the past 10 days, to provide you with detailed structured data and analysis.
1. The importance of air volume in fresh air systems
The air volume of the fresh air system is directly related to the ventilation effect of indoor air. If the air volume is too small, it cannot meet the indoor air demand; if the air volume is too large, it may cause energy waste. Therefore, scientific calculation of air volume is a key step in installing a fresh air system.
2. Calculation method of air volume of fresh air system
The air volume calculation of the fresh air system is usually based on the following two standards:
| calculation standard | formula | Description |
|---|---|---|
| Per capita fresh air volume | Q = n × q | Q is the total air volume (m³/h), n is the number of people, q is the fresh air volume required per person (usually 30m³/h) |
| Room air changes | Q = V×k | Q is the total air volume (m³/h), V is the room volume (m³), and k is the number of air changes (usually 0.5-1 times/h) |
Taking a bedroom with an area of 20㎡ and a floor height of 2.8m as an example, where 2 people live, the air volume is calculated as follows:
| Calculation method | result |
|---|---|
| Per capita fresh air volume | 2 × 30 = 60m³/h |
| Room ventilation frequency (taken as 0.8 times/h) | 20 × 2.8 × 0.8 = 44.8m³/h |
The final air volume should be the larger of the two, that is60m³/h.
3. Other factors affecting air volume calculation
In addition to the basic calculations above, the following factors need to be considered:
| factors | influence |
|---|---|
| House sealing | Poor sealing requires increased air volume |
| local air quality | Severely polluted areas need to increase air volume |
| Equipment loss | It is recommended to reserve 10%-20% margin |
4. Hot topics on fresh air systems in the past 10 days
According to the search data on the entire Internet, the hot discussions about the fresh air system in the past 10 days mainly focus on the following aspects:
| topic | heat index |
|---|---|
| Fresh air system vs air purifier | 85% |
| Wall-mounted fresh air system installation guide | 78% |
| How to avoid fresh air system noise | 72% |
| Advantages and disadvantages of heat exchange fresh air system | 65% |
5. Things to note when purchasing a fresh air system
1.Air volume matching:Select equipment with appropriate air volume based on calculation results.
2.filter level: It is recommended to choose a HEPA filter with level H13 or above.
3.Noise control: The noise of equipment in the sleeping area should be less than 30 decibels.
4.heat recovery efficiency: In the northern region, it is recommended to choose a model with a heat recovery efficiency of more than 70%.
6. Summary
Correctly calculating the air volume of the fresh air system is the basis for ensuring efficient operation of the system. With the calculation methods and structured data provided in this article, you can easily determine the required air volume. At the same time, paying attention to recent hot topics can help you understand the latest trends in the industry and make more informed purchasing decisions. It is recommended to consult a professional before installation for the best experience.
With the advancement of technology, intelligent fresh air systems are becoming a new trend. In the future, fresh air equipment with functions such as automatic air volume adjustment and remote control will become more popular, bringing users a more convenient and efficient air purification experience.
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