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7 months agoI use another brand (Resmed) and pulled my old one apart to see what’s inside. They are well engineered - and they need to be, as they run 7-8 hours, every night. They also have quite a bit of soundproofing surounding the pump. Mine had spray expanding foam and the spongy seat padding type, but this is all outside the airflow. I suppose they could use foam inside the air tubes for further sound damping, but it seems a bit dumb as if any breaks off it will go straight up your nose.
15117, and ignore the rotating disk. Every second dial seems to run backwards, so it might actually be some sort of time machine.