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Model 25378126890 Should knob be on vent or closed while operating/ this is a window a/c This is a Sears product and first knob says closed or exhaust. Can.t find my manuel and haven.t used it for some time unit is working great on exhaust but is it correct?

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The vent just lets fresh air in when the fan is running. either way is fine except very humid weather may effect the indoor air. i would close it during these times.

Posted on Jul 14, 2009


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