How many of you learned the hard way bout pollen dust and particles being breathed in this biz?
There are certain seasons here in SoCal when working CA Sycamores, even wearing respirators and bandanas, is insufficient to keep you from choking.
The ability to achieve a positive ventilation chamber, using freshly filtered compressed air, delivered via hose/rope, with no fear of breathing nasty stuff, provided your compressor is drawing good air outside the dust cloud any length of time.
Air can also be heated or chilled at the compressor then delivered via insulated auxiliary lines in the hose assembly, preferably integral to an all terrain crane.
Making working in extreme weather on either end of the scale, safer and more doable.
Your chainsaws have filters for optimum performance, so should you, the climber, shakin the bush for the boss man!
Jomo