[HayZee518]

Is this a roll around air conditioner? Obviously you can't vent off the latent heat in a closed room. Option one is install a window. The vent tube should occupy the closest exit point and having a window 20 feet away may work, the burden on the a/c unit is too great for extending the exhaust tube. Another potential problem is draining the condensate. Most a/c units have a slinger that blows a bit of the condensate through the condenser and out the back of the unit.