All heat and a/c air handling in Airstreams are handled by flex tubing- normally a silver color and made from fabric wrapped spring wire. The fewer twists, and excess length used, the better the air flow and velocity.
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steelbird312 WBCCI #6673 jerry Hodge
2013 31" Classic limited
Have no intention of arriving at the grave safely, but rather to skid in sideways, chocolate in one hand, throttle in the other, totally worn out and screaming
"WOO HOO, WHAT A RIDE!"
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