Don't know if these are around any more, before I tied into my HVAC I had tried a portable air conditioner that was also a dehumidifier and exhausted it out my exhaust vent with a Y adapter. Reason I mention this particular unit is it can run on dehumidify without the air and was quite efficient, in addition it can be hooked up (with a drain hose) to directly drain somewhere. I had a sump pump in my room so I just ran the drain hose into the sump pump hole. I bought it at factorydirect.ca for $225 at the time. Model: Haier Air Conditioner CPRB08XCJ.