ventilation

For an hour, he sat on the train, the doors closed, until people could pry them open to let in ventilation.

“We have building space we don’t pay rent for. There are the refrigeration services and the ventilation services we need to do our specialized work. Our indirect costs go to support that.”

These settlements often lacked indoor plumbing or ventilation, leading to a rapid increase in the spread of illnesses.

“Or did he provide an innovative ventilation system?”

It confirmed he no longer uses mechanical ventilation for breathing at night, but was instead receiving oxygen via a small tube under his nose.