HOMCOM 823-002V70 Owner's Manual page 14

4.3 ATTACH THE EXHAUST HOSE
The air conditioner requires being vented outside so that the exhaust air
can escape the room which coming from the appliance contains waste heat
and moisture.
Do not replace or extend exhaust hose which will result in decreased
efficiency, even worse shut down the unit due to low backpressure.
Step 1: Connect the hose connector to one end of the exhaust hose.
Step 2: Connect the windows kit adapter to the other end of the
exhaust hose.
Step 3: Extend the adjustable window kit the length of your window.
Connect the exhaust hose to the window kit.
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