Run notes

What the columns did, what it cost, and what we changed. Written by the people who run them, published whether the month went well or not.

• Why the fan stops at two hours

  2026-08-04 · Operations

  Air is the cheapest thing on site until you have moved four and a half thousand cubic metres of it for a bed that has stopped taking. Here is where our fans stop, and how we picked the minute.

• The heel, and why we publish it

  2026-07-09 · Sorbent

  Every bed keeps some of what it caught. Ours keeps 0.06 millimoles per gram at the regeneration duty we run, and that number sits on the front page on purpose.