Can you convert a single-hose portable AC unit to a double-hose setup and gain tons of efficiency ? And are more hoses more better ?
Read on.

The answer in short is yes. But it's way more complicated than just fixing a second hose to the back air inlet.
But ! With this one you just need to attach a second hose securely. Done !
But what if we feed it the warm air from the top of the room ? Here comes the 3rd hose.

The final result is surprisingly effective, and beat my expectations.

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