We don't use it steadily. It does want to ice up, but that is where the JCI freeze sensor comes in. It cuts the compressor and the fan blows 24/7 and de-ices the coils until it warms enough and the compressor runs again. I would say it probably is not a full time solution, but we are only keeping deer from going bad in the warm weather and it does that plenty well.
I can't answer the physics of the cooling. The coil ices up, but I can't say its leaving the room, but to maybe drip on the stone floor.