THE BEST AIR PURIFIER IN SAN ANTONIO TEXAS

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THE BEST AIR PURIFIER IN SAN ANTONIO TEXAS

In 1830, a patent was awarded to Charles Anthony Deane for a device comprising a copper helmet with an attached flexible collar and garment. A long leather hose attached to the rear of the helmet was to be used to supply air, the original concept being THE BEST AIR PURIFIER IN SAN ANTONIO TEXAS that it would be pumped using a double bellows. A short pipe allowed breathed air to escape. The garment was to be constructed from leather or airtight cloth, secured by straps.[1]

In the 1860s, John Stenhouse filed two patents applying the absorbent properties of wood charcoal to air purification (patents 19 July 1860 and 21 May 1867), thereby creating the first practical respirator.[2]

A few years later, John Tyndall invented an improvement to the THE BEST AIR PURIFIER IN SAN ANTONIO TEXAS fireman's respirator, a hood that filtered smoke and noxious gas from air (1871, 1874).[3]

In the 1950s, HEPA filters were commercialized as highly efficient air filters, after being put to use in the 1940s in the United States' Manhattan Project to control airborne radioactive contaminants.[4][5]

The first residential HEPA filter was reportedly sold in 1963 THE BEST AIR PURIFIER IN SAN ANTONIO TEXAS by brothers Manfred and Klaus Hammes in Germany,[6] who created the Incen Air Corporation which was the precursor to the IQAir corporation.

Joseph Allen, director of the Healthy Buildings program at Harvard's School of Public Health, recommends that school classrooms use an air purifier with a HEPA filter as a way to reduce transmission of COVID-19 virus, saying "Portables with a high-efficiency HEPA filter and sized for the appropriate room can capture 99.97 percent of airborne particles."[8]

However, one study from January 2021 suggests that operating air purifiers or air ventilation systems in confined spaces during their occupancy by multiple people leads or can lead to increased airborne virus transmission due to air circulation effects.[9][10]

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