This is my advice for those who wish to use a Bee Vac. First they are great, maybe even a necessity.
What I wish to talk about is the length of hose....
I use 1" i.d. smooth wall hose.
This has been my experience...
4' hose......less than 1% fatality
10' hose....about 40% fatality
24'hose.....100% fatality (this being 50% dead and 50%very disoriented and finally death)
Use a short hose...period.