The new air system is all the rage now, with many households using it for ventilation, air purification, and甲醛 removal. However, choosing a new air system is a complex task. Making a hasty decision without proper research can lead to selecting poor or inappropriate equipment. Today, we share with you "Ten Things to Know About New Air Systems." Knowing these will ensure you don't pick the wrong machine and won't regret your choice.

Never overlook the noise level of the ventilation system.

Imagine this: Finally, you've installed a new air purifier at home. You're excited to close the windows at night, free from stuffiness and the outside noise disturbing your sleep. You're looking forward to a good night's rest. But, to your dismay, the air purifier runs too loud, making it impossible to sleep through the noise. Isn't that frustrating? Therefore, when choosing an air purifier, never ignore the noise level. Generally, yx's air purification systems should not exceed 30 decibels when running at low speed, and 50 decibels at high speed. Take the Dian Air Purification System 3S as an example; it's completely silent when running at low speed at night, so even if you're particularly sensitive to noise while sleeping, you have nothing to worry about.

2. Airflow volume in the air purification system is not the more, the better.

Some people prioritize air volume when choosing a new ventilation system, believing that the higher the volume, the better. A unit with a 300 CFM is always better than one with a 200 CFM, right?

Incorrect. The fresh air volume should be appropriately selected based on the area and number of people, neither too much nor too little. For instance, for an office of 60 square meters, a fresh air system with a fresh air volume of 500m3/h is overkill, leading to waste of electricity and filters, and due to excessive noise, no one would use the highest speed setting.

Ceiling-mounted air purifiers should not be chosen with excessive air volume: Such air purifiers, even with large air volume, can only meet the ventilation and air exchange needs of a single room. Excessive air volume also leads to a larger air purifier size, a quicker accumulation of dirt on the filters, and cannot heat a large volume of cold air brought in from the outside during winter.

3. Don't confuse different air volumes and airflow rates.

The greatest value of a new air system is to introduce fresh outdoor air. Some consumers believe that a higher airflow results in better ventilation, thus preferring to purchase machines with "high airflow." However, it turns out that "high airflow" machines do not necessarily deliver more fresh air.

Be clear: Airflow is not the same as fresh air volume! Fresh air volume refers to the new, outdoor air introduced, while "airflow" might denote a mix of new air and recirculated indoor air. If most of the "airflow" from the air purifier is simply recirculated indoor air, its ventilation and air exchange effect is limited. Therefore, be sure to ask about this when making a purchase.

Filter grade is not the higher, the better.

Is a higher filter grade for air purifiers always better? It's important to know that: For the same area of filter, the higher the grade, the greater the air resistance, the smaller the fresh air volume, the harder it is to control the noise, the shorter the lifespan of the filter, and the overall cost of consumables will also increase...

For instance, the H12 grade filter has a PM2.5 filtration efficiency of over 99.4%, while the H13 grade boasts an efficiency of over 99.94%. How much are you willing to pay for such a small difference? Isn't 99.4% sufficient? Do you really need to create a surgical-grade clean environment at home? For ordinary household and living environments, H13/H14 filtration grades are excessive, and even the highest HEPA filter grade cannot completely filter out harmful gases and odors. Dian'an New Air manufacturer states that the most complete filter combination for a home air purification system is a pre-filter + large-area H11/H12 grade HEPA filters + a large-capacity activated carbon filter. This combination can create a healthy indoor environment for the family without wasting consumables.

5. Only a sufficiently large heat exchange volume is effective.

Consumers often demand heat exchange in their new ventilation systems, hoping to enjoy cool air in summer and warm air in winter, thus saving on electricity costs. However, upon returning home, they find that the heat exchange performance is not as impressive as expected. Why is that? Here's the scoop: the effectiveness of the heat exchange in new ventilation systems is related to the size of the heat exchange core; it's only useful when the core is sufficiently large.

Especially for wall-mounted air purifiers, most manufacturers only include a very small heat exchange core to maintain the compact size of the machine. On the surface, it seems like an added benefit, but the actual performance is not impressive.

For optimal energy-saving effects through heat exchange, it's best to opt for a central fresh air system with a larger heat exchange core. The heat exchange function of wall-mounted fresh air systems often falls short, which is why the majority of consumers still prefer single-directional airflow fresh air units.

6. Air purification systems for removing formaldehyde do not "filter" it but "blow it away."

Someone believes that installing an air purification system can remove formaldehyde released from indoor decoration, thinking it works through activated carbon filters, but this is a misconception. Air purification systems can indeed remove formaldehyde from indoor decoration, but not through activated carbon filters. Instead, they achieve this by continuously introducing fresh outdoor air and expelling indoor polluted air, diluting and "blowing away" formaldehyde gases in the home through a continuous process of air exchange. This principle is actually quite simple, similar to opening windows for ventilation before moving in to "air out" the house. However, the advantage of the air purification system is that it provides continuous ventilation 24/7 and can prevent outdoor pollutants from entering the indoor space.

7. A wall-mounted new air ventilator cannot achieve "whole-house ventilation and air exchange."

When introducing the fresh air volume, we mentioned that a wall-mounted air purifier can only meet the ventilation and purification needs of one room, and is unable to ventilate the entire house, even with a large fresh air volume. This is determined by the ventilation principle of wall-mounted air purifiers: when the air purifier forces air to be blown, the room is in a positive pressure state, causing the original indoor air to naturally be pushed into the negative pressure area (kitchen, bathroom).

Installing a high-volume wall-mounted air purifier in the living room won't circulate fresh air to the bedroom, as the bedroom lacks an exhaust vent and is not part of the negative pressure zone. Similarly, placing an air purifier in one bedroom and expecting it to benefit the other is a misconception.

The wall-mounted air purifier needs to be installed in each room to achieve whole-house purification, allowing for independent control of the fresh air volume and temperature in each room. Fortunately, the De'an wall-mounted air purifier Mini is very affordable at just $2188 per unit, including installation fees. Installing one in each room won't break the bank, and it takes up minimal space.

8. The central fresh air system cannot independently control the fresh air volume and temperature in each room.

Central air supply systems can easily achieve the effects of "whole-house purification" and "whole-house ventilation and air exchange," but they do have a drawback: the新风 volume and temperature in each room cannot be controlled. Many consumers tend to overlook this important issue: family members have different needs. Some prefer a cool breeze of 17-22 degrees Celsius when they sleep, while others may easily wake up chilled at night. Some like it warm during the day and cool at night. Some rooms are temporarily unoccupied, while others are short-term gathering places for many guests. In children's rooms, there may be a baby sleeping. In these situations, it is essential to independently control the新风 volume and airflow temperature in different rooms. However, central air supply systems can only uniformly provide the same新风 volume to all rooms, with a unified on/off operation.

The one-way flow wall-mounted air purifier is a mainstream product in the new ventilation market.

Why has the single-direction wall-mounted air purifier system remained a mainstream online product? Why are over 66% of the air purifiers sold small-volume single-direction wall-mounted units? It's easy to understand the appeal of such products for the average consumer: flexible installation, effective ventilation and air exchange, often smaller in size than dual-direction units, and more affordable pricing. While dual-direction air purifiers have their advantages, such as better smoke extraction in smoking areas, a forced-air wall-mounted air purifier system in each room of a typical household can fully achieve the desired ventilation and air exchange effects.

The new wall-mounted dual-flow air purifier has a drawback: to avoid disruption in the fresh air flow, the intake and exhaust ports of the fresh air system need to be placed as far apart as possible, usually more than 1 meter. However, we also know that wall-mounted air purifiers are valued for their compactness, which leads to the intake and exhaust ports being close together, making it easy for the fresh air to short-circuit. The clean, filtered fresh air that has just been introduced quickly mixes with the original polluted air inside, and then gets exhausted. This is why the vast majority of users opt for single-flow wall-mounted fresh air systems.

10. Craving fresh, warm air during the chilly winter? Choose the intelligent heating fresh air system!

Buyers of新风 systems rarely consider how to use them during the coldest winter months? Will they blow cold air, create cold drafts, lower indoor temperatures, and affect family health? In cold winter regions, it's best to use an electrically heated新风 system that allows you to set the desired outlet temperature. Delian's新风 systems feature a unique intelligent warming function, allowing users to freely set the desired outlet temperature. Even when it's extremely cold outside, it ensures that the air delivered is at the warm and comfortable temperature you've set. This prevents cold air from coming into contact with the warm indoor air, thereby avoiding condensation and frost formation.

How to Choose an Air Purification System? After reading the top ten things to know about air purification systems above, we hope everyone now has a clearer standard and reference, and can choose the right machine.