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We just got a portable carbon dioxide monitor, to use as a vague proxy for ventilation and covid risk.
I calibrated it this afternoon, at which point the air right outside our building was at 404 ppm CO2. We then put it on a bookshelf near the apartment door, hoping we'd notice it before heading out.
It turns out that baking chocolate chip cookies, and then having the oven door open long enough to remove two cookie trays, sent the air around the corner from the kitchen up to something like 1600 ppm. The device beeps once if it gets a reading above 1000 ppm, and beeps for a minute if it goes about 1500, unless you tell it to be quiet already. We're now trying a different shelf, further from the stove, but also easier to overlook on our way out.
I calibrated it this afternoon, at which point the air right outside our building was at 404 ppm CO2. We then put it on a bookshelf near the apartment door, hoping we'd notice it before heading out.
It turns out that baking chocolate chip cookies, and then having the oven door open long enough to remove two cookie trays, sent the air around the corner from the kitchen up to something like 1600 ppm. The device beeps once if it gets a reading above 1000 ppm, and beeps for a minute if it goes about 1500, unless you tell it to be quiet already. We're now trying a different shelf, further from the stove, but also easier to overlook on our way out.