“Zephyr Valves are one-way valves that allow trapped air to escape from the damaged ... to breathe but also lessens the ...

At least until now, as [Aris Alder] tackles the problem with an affordable DIY supplied-air respirator. Now, we know what you’re thinking, anything as critical as breathing is probably best left ...

A spokesperson from Textron Aviation said that initial findings indicated that “oxygen readings in certain locations of the breathing air system were below acceptable levels at the time of the ...