Simple air filters filter indoor air pollutants

A simple homemade air filter can effectively filter indoor air pollutants

The new coronavirus outbreak has brought new emphasis to indoor air quality.

Reducing the concentration of common chemicals in indoor air that pose a risk to human health is one way to improve the health of occupants.

Recently, a study published in Environmental Science and Technology showed that Brown University researchers homemade a box-like device called Corsi-Rosenthal.

This device can effectively reduce indoor air pollutants while adsorbing virus-carrying particles.

These air filters are inexpensive and easy to manufacture, and the materials can be found in hardware stores.

  • Four MERV-13 filters.
  • Piping tape.
  • A 20-inch fan box and a cardboard box.

They cost around $100 on average.

During the experiment, Corsi-Rosenthal boxes were assembled by students and community members and dropped off in buildings across campus.

The results of the one-month test showed significant reductions in the concentrations of several PFAS (perfluorinated or polyfluoroalkyl substances, known as “permanent chemicals”) and phthalates in 17 rooms, by 40-60% and 30%-60%, respectively.

The use of Corsi-Rosenthal boxes causes a small amount of noise problems, perhaps limiting their application scenarios, but the health benefits of the boxes may outweigh the noise side effects.

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