It's a super heat pump, there is a compressor that mounts outside, it uses the freon to produce the heat, no venting needed.
The only lines going to the inside unit are from the compressor, if you have the funds, this may be an option, and, you can buy these online, the larger units run off 220V. I have a 16k btu unit, if I were relying on it for heat by itself, I would have gotten a larger unit. There are charts online to get you in the ball park to what size to buy.