Views: 0 Author: Site Editor Publish Time: 2026-07-17 Origin: Site
Many people hold a romantic misconception: with no industrial pollution or vehicle exhaust in ancient times, the air breathed by ancient people must have been far purer than what we inhale today. But is this really the case?
If you traveled back in time to ancient civilizations, you would likely be proven utterly wrong. The indoor air quality back then was often no better than a heavily smoggy day in the modern world.
Ordinary households in ancient times relied entirely on burning firewood and coal for daily cooking and winter heating.
As documented in Tiangong Kaiwu (Exploitation of the Works of Nature), an average family burned several catties of firewood each day. The PM2.5 particles produced by such biomass combustion could reach 5 to 8 times the limit set by modern indoor air quality standards.
Those born in the 1980s and 1990s may find this scenario strikingly familiar.
Faced with poor air conditions, ancient peoples did not resign themselves to the problem. Instead, they leveraged remarkable wisdom to launch their own campaign for breathable air.
In architectural design, ancient builders embodied the Taoist philosophy of harmony between humanity and nature.
Take the traditional siheyuan (quadrangle courtyard) as an example: built facing south with its main structure to the north, it makes clever use of courtyards, winding corridors and elevated roofs to create natural cross ventilation and a chimney effect. Hot air rises and escapes naturally, keeping indoor spaces cool and well-aired.
In household craftsmanship, the wild goose-shaped bronze oil lamp from the Western Han Dynasty stands as a pinnacle of ancient eco-friendly technology.
Craftsmen hollowed out the wild goose’s body to serve as a water reservoir. When the lamp was lit, smoke and fumes traveled through a tube into the goose’s torso, where water diluted and filtered pollutants to drastically reduce indoor air contamination.
Scholars and literati also placed exquisite incense tubes indoors. Natural spices and dried flower petals trapped airborne impurities, leaving rooms smelling fresh and fragrant.
Fast forward to the present day. Beyond outdoor smog, newly renovated homes introduce harmful pollutants such as formaldehyde and TVOC, while sealed air-conditioned rooms suffer from excessive carbon dioxide buildup — these have become new threats to healthy breathing.
In daily life, air purifiers have become our most reliable ally in safeguarding respiratory wellness.
Formaldehyde is released continuously over 3 to 15 years in residential spaces, alongside ubiquitous airborne allergens. Relying solely on opening windows for ventilation only addresses the problem superficially. This is where a high-performance air purifier becomes indispensable.
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