3 ms·

Good to know. I understand they exchanging the air with the outside every couple of minutes now, too, which seems very smart.

• sokoloff 6y ago
  That's not new. Air changes per hour on pressurized airliners have always been in the 10-20 changes per hour (typically 12-15). More changes costs some incremental fuel (as it siphons pressurized bleed air), but the effect is quite small.
  • dhimes 6y ago
    I had read it was 4 times an hour prior to covid.
    • sokoloff 6y ago
      That’s office building territory. Airplanes have always been higher.
• tatersolid 6y ago
  Airliners have always exchanged air fairly rapidly; if they didn’t 250 people in a small space would rapidly suffocate.