Northboro Air Quality Measurement

June 5th, 2022
airquality
Yesterday I played the Northboro contra dance with Kingfisher, and I made the same CO2 measurements I did at BIDA a few weeks ago. This is a very different environment:

  • 30 vs 80 attendees
  • Eight big windows with no fans vs two doors with big barrel fans
  • Maybe 1/3 the size

Here's what I measured, compared to last time:

The overall shape is very similar: rising as dancers arrive and start dancing, falling during the break, rising again after the break, and then falling at the end. BIDA's break was probably slightly later, and it took a little longer for the dancers to leave the home at the end of the night.

Because atmospheric CO2 is ~400ppm, this chart makes the two cases look a bit more similar than they really are. Let's subtract 400 ppm from each and look at CO2 levels above baseline:

Looking at the area under the curve, a dancer at Northboro likely experienced about 40% of the risk of one at BIDA (448 vs 1,116 ppm hours of excess CO2).

Putting fans in the windows would likely cut this even further, especially if you have them blow across the hall and match them to the prevailing wind.

Comment via: facebook, lesswrong

Recent posts on blogs I like:

On The Prosperity Gospel

things I find fascinating: religion, scams

via Thing of Things February 19, 2024

Diseconomies of scale in fraud, spam, support, and moderation

If I ask myself a question like "I'd like to buy an SD card; who do I trust to sell me a real SD card and not some fake, Amazon or my local Best Buy?", of course the answer is that I trust my local Best Buy1 more than Amazon, which is notoriou…

via Posts on February 18, 2024

Raising children on the eve of AI

How do we prepare them for what we're not prepared for? The post Raising children on the eve of AI appeared first on Otherwise.

via Otherwise February 15, 2024

more     (via openring)