Flexible air intake hose

Thanks, but that stuff is only flexible for shaping and not rotational
vibration.
Most of those "flexible" ducts have wire reinforcing helix which
resists rotational motion along the axis of the duct.

Morgans wrote:
Look in the home improvement area of a big box hardware and lumber store.
Flexible clothes dryer duct is available in a aluminized plastic that is
rated for the heat of a gas dryer outlet, so it should stand up to the
environment, if it does not get too too hot.
--
Jim in NC