The IATA claims that airplane air is refreshed every 2-3 minutes, with half going through filters and half as fresh air. While technically that means the whole volume of air never fully is replaced (only halved every 3 minutes ), it still goes through a HEPA filter. I'm pretty sure most homes don't refresh the air that often
The IATA claims that airplane air is refreshed every 2-3 minutes, with half going through filters and half as fresh air. While technically that means the whole volume of air never fully is replaced (only halved every 3 minutes ), it still goes through a HEPA filter. I'm pretty sure most homes don't refresh the air that often
Also your link for that was testimony from tobacco groups claiming that the airlines saved that much money. I realize it was in court, so the guy likely wasn't lying, but is there any other evidence that's why they changed the air systems? Did high-quality filtration systems improve around the 90s, allowing airlines to refilter some of the air instead of bringing in fresh air, which would save money on heating the fresh air each time the cabin refreshes?
Airliners control cabin pressure by feeding in bleed air from the engines and then releasing it via valves on the aft bulkhead. Turns out that the valves were maintenance headaches, they were constantly clogged with cigarette tar, with the result that regulating cabin pressure would become difficult.
The IATA claims that airplane air is refreshed every 2-3 minutes, with half going through filters and half as fresh air. While technically that means the whole volume of air never fully is replaced (only halved every 3 minutes ), it still goes through a HEPA filter. I'm pretty sure most homes don't refresh the air that often
Also your link for that was testimony from tobacco groups claiming that the airlines saved that much money. I realize it was in court, so the guy likely wasn't lying, but is there any other evidence that's why they changed the air systems? Did high-quality filtration systems improve around the 90s, allowing airlines to refilter some of the air instead of bringing in fresh air, which would save money on heating the fresh air each time the cabin refreshes?
Plus, air in the stratosphere is very clean.
Airliners control cabin pressure by feeding in bleed air from the engines and then releasing it via valves on the aft bulkhead. Turns out that the valves were maintenance headaches, they were constantly clogged with cigarette tar, with the result that regulating cabin pressure would become difficult.