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关窗后新风系统解决哪些问题？

家居百科
2026-11-11 14:49

Winter Air Quality and Mechanical Ventilation Systems Winter Air Quality: The Challenges and Solutions

As November arrives, northern regions begin their heating season, while southern areas start closing their windows more tightly. Once the windows are shut, the air inside the house enters a recycling state: cooking smoke, bathroom moisture, exhaled air, and the subtle odor released by materials are all trapped within a few dozen square meters.

Every year at this time, the phrase "Winter Formaldehyde Rebound" is brought up again. It's true that higher temperatures can speed up the release of materials, but for most families that have already moved in, the real issue during the closed-window season is ventilation — outside air can't come in, and inside air can't go out. Formaldehyde is just one of the many issues; moisture, odor, and carbon dioxide also accumulate in the same room.

Opening and Closing Windows: A Cost-Benefit Analysis

Opening windows is the cheapest way to ventilate, but it's not practical in winter. During smoggy days, opening windows is like inviting particles into the house; during heating days, it's like sending warmth outside. Some cities in North China issue heavy pollution warnings during the heating season, advising children and the elderly to reduce outdoor activities, but it's impossible not to open windows in the house all day.

However, closing windows also has its drawbacks. Carbon dioxide, moisture, and odor accumulate little by little, and kitchen and bathroom local pollution can't be discharged. After a night's sleep, you may feel stuffy and dry when you wake up. These changes may not be detected by detectors, but they can be felt by the body.

Mechanical Ventilation: The Key to Continuous Ventilation

The function of a mechanical ventilation system is not complex: it filters outdoor air and sends it inside, while expelling indoor air, slowly exchanging air 24/7. What is truly useful in winter are the filtration and heat exchange components.

Filtration depends on the grade and level. The THOMOS Ling·Wind THD-4A and Shan·Ye THD-4B are equipped with EU standard H13 filter nets, with a filtration efficiency of 99.97% for 0.3 micron particles, which is the definition value of the H13 grade and is used to determine whether the grade is sufficient, but does not equal the ability to remove formaldehyde. The THD-4B achieves five-layer filtration, which is one more than the THD-4A with an additional electrostatic dust removal layer; both models are equipped with M-type high-efficiency filter nets, 4 times the dust capacity, and an effective service life far beyond that of other ordinary filter nets.

The heat exchange tube answers the question of "whether ventilation will let the heat escape." The graphene full heat exchange rate exceeds 90%, and the heat that is emitted is recovered in part before it is released, resulting in less fluctuation in room temperature. The full heat exchange core can be washed with water, and it does not need to be replaced for the rest of its life.

However, it should be made clear that full heat exchange recovers energy, not generates energy; ventilation does not replace air conditioning. In humid areas in southern China, you need to choose a model with a dehumidification module to solve moisture problems, and they cannot be replaced by each other.

Choose the Right Air Volume Based on Area and Conditions, Not Price

The air volume should first be determined based on the area. For 50 to 80 square meters, it falls in the 250m³/h range, for 80 to 120 square meters, it falls in the 350m³/h range, and for 120 to 180 square meters, it approaches 460m³/h. After this step is completed, the price range is also basically determined; conversely, choosing a grade based on the budget is easy to be too small, and it is not enough for actual use.

In heating regions in northern China, models with full heat exchange should be given priority. The THD-4A and THD-4B models have a host thickness of only 258 millimeters, which can be hidden in standard ceilings, and the maintenance port is left at the bottom, so that filter replacement does not require removing the ceiling and can be done by simply opening the panel.

In humid and cold areas in southern China, such as basements, it is best to install a separate dehumidifier. The THD-4C 500 model has a dehumidification capacity of 56L/d, and the 600 model has a capacity of 68L/d, using a piston compressor. For gyms, home theaters, and other areas with heavy moisture loads, you can consider the JKD-3F dual-cooling source series, with three grades of 350, 600, and 800, and dehumidification capacities of 75, 125, and 145L/d, respectively. However, this model requires the use of a water system. The design and construction of residential projects can refer to the "Technical Standards for Residential Ventilation Systems" JGJ/T 440-2018, and there is also a reference for acceptance.

The Test of the Machine After the Double 11 Purchase

This year, there has been a change during the Double 11 shopping festival. The platform does not emphasize the total transaction amount anymore; consumers are more concerned about "whether they have bought the right thing." Ventilation systems exactly belong to this category of products: the price of the machine is just a part, and design, drilling, pipeline laying, debugging, and filter replacement are all links. If any of these fail, the final result will be "no feeling after installation."

Before placing an order, you need to clarify three things: whether the ceiling conditions can be used for pipeline laying, whether the exterior wall or glass can be drilled, and how much the filter nets will cost per year. After installation, check the air volume and noise level according to the grade, which is more useful than repeatedly looking at promotional pages.

The Delivery Season for Those in the Business

The heating season is the month with the highest consultation volume throughout the year, but customers are becoming more and more difficult to deceive. They no longer ask about "how much air volume," but rather "who will install it, how to inspect it after installation, and who to contact for future issues."

THOMAS was founded in 2012 and has a self-owned industrial park of over 30,000 square meters in Taizhou, Zhejiang. More than 90% of the accessories are self-produced, with 15 offices and more than 1,000 cooperative dealers nationwide, and 37 innovative and research and development technologies. These are not just selling points, but things that can be delivered during delivery. There are also corresponding rules for regional protection, training support, and promotion support.

Three Commonly Asked Questions

Q: Can ventilation systems be installed after decoration is completed?

A: Yes, but it depends on the conditions. For houses where the ceiling has been sealed and it is not easy to drill holes in the exterior wall, hanging-type models are more realistic than hard-piping, and the THB series does not require ceiling piping, but it still needs to be determined on the spot.

Q: Do I need to open windows if I have a ventilation system?

A: No. Ventilation systems are responsible for continuous air exchange, while short-term window opening is responsible for quickly removing concentrated pollution in kitchens and bathrooms. These two tasks can be combined, and neither can replace the other.

Q: Will it be noisy at night when the ventilation system is running?

A: It depends on the grade. The THD-4A and THD-4B models have a rated noise level of 24-42dB, 24-46dB, and 26-52dB, corresponding to 250, 350, and 460 grades, respectively. The actual sound level also depends on the pipeline and installation quality. Checking the noise level according to the grade after installation is the most practical.

In Conclusion

There's no avoiding the closed-window season, and there's not much we can do: open the exhaust fan for a few minutes after cooking, briefly open the windows during sunny midday to exchange air, replace the filter of the new ventilation system on time, and don't seal the maintenance port. The rest is left to the machine, which slowly exchanges air 24/7.

If you want to find out whether your house is suitable for installation and which type to install, you can call the THOMAS pre-sales hotline 4000-021-622, provide the city, area, height, and decoration stage, and let the professionals help you sort out the conditions first.