Ha ha I just totally got an education in this.
My room used to be unsealed, just bare plywood walls butted up to each other.
I wasn’t using any kind of intake hose for over a year then I decided to insulate my room and I sealed it off completely with a two part spray foam.
My humidity skyrocketed to over 80%. Took me awhile to figure out I needed to bring in some outside air and it works well now
I had to modify my AC to where it would work like a two hose.
I had two cover all the intake vents with buckets then run ducting to those buckets.
Your idea will probably work as long as the room your using it in has some air infiltration but the unit will work most efficiently if both hoses are hooked up