Yeah I kinda know about the lung stuff. I have a bad case of bronchitis right now in the upper tubes My volume is half what it should be at 2500 full strength draw and 2250 with the marker at best rate.Not happening. He only has one lung that works. Now he says it's missing a piece to the stand and there's nothing more in the box. It has two glasses with it.
An 80 year old my size should be 3100 and 70 is 3500.
With only one, I know he is struggling in the heat and humidity Big Hugs for you all keeping him going @Amish Heart It is a struggle when the air gets thick.