When you say "bucketless drain system", do you mean there is no reservoir to drain, either by emptying a bucket, or through a hose? Does it have auto-drain, where the moisture goes out through the window? Where I keep my portable air conditioner, it is impossible to move it for draining (I would have to move my sofa), so I want an air conditioner that does not require me to drain any kind of water from it. I have another portable air conditioner from American Comfort, and it has a small 1/4" hose that goes from the air conditioner, out through the exhaust hose, to vent to the outside. This is where the moisture that accumulates in the air conditioner goes....no emptying of any buckets, or draining with a hose. I want an air conditioner that performs exactly the same way.