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The agency had advised people to ventilate indoor air before, but this is the first time a federal agency has set a target – five air changes per hour – for how much rooms and buildings should be ventilated.

vin3_EN 2023-05-13 07:00:34

1ºGet a 20x20 box fan. Take a HEPA furnace filter with a MERV 13 rating and seal it to the back of the fan. The fan should be of better quality. You need a strong motor to pull the air through the filter. It works wonders for a room. I would say it is on par with some of the air filtration machines on the market and a whole lot cheaper. There are companies that actually produce fans with a back already in place to hold the filter and they add in a stronger motor. It isn't perfect but it will help out. It works great for bedrooms.

CDC sets first target for indoor air ventilation to prevent spread of Covid-19 | CNN

The agency had advised people to ventilate indoor air before, but this is the first time a federal agency has set a target – five air changes per hour – for how much rooms and buildings should be ventilated.