• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • 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

    Recent posts on blogs I like:

    Be less scared of overconfidence

    deferring to markets • deferring to experts • deferring to low-information heuristics • why they fail • blindness to outliers • what to do instead

    via benkuhn.net November 30, 2022

    Corncob Dolls

    I went to a farm and at the farm I got to see a corncrib and the corn that had fell out of the corncrib that no one wanted I got to use my fingers to take off the corn kernels and once the cobs were empty I put them in a bag and then once I got back to the…

    via Anna Wise's Blog Posts November 7, 2022

    Light Switch

    When I got my loft bed it was just so annoying every morning to have to get out of bed, climb down the ladder, turn the light on, and climb back up, just so I could see stuff. I decided to make a string for my light switch because I really wanted to be abl…

    via Lily Wise's Blog Posts November 7, 2022

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact