It's an air to air Fujitsu. I'll check on the model when I get a chance. Most of our winter weather hovers in the mid 30's, day and night. We get occasional co

It's an air to air Fujitsu. I'll check on the model when I get a chance. Most of our winter weather hovers in the mid 30's, day and night. We get occasional cold spells in the 20's, but it's rarely in the teens and I've seen single digits once in twelve years here. I don't think it's ever been below zero here. It was interesting to get used to the heat pump just being on low all the time. Our monitor stove would come on in bursts, and you'd notice a steady heating/ cooling cycle throughout the day. The heat pump just puts out a steady, slightly warm airflow all day long. I'm not sure how heat pumps behave in colder climates. Our landlord did not remove the monitor stove when he had the heat pump installed, and it was nice to know we could fall back on the monitor if the heat pump was not putting out enough heat. You might consider leaving the propane system in place this winter if you do try a heat pump. It might just give you a little peace of mind about not having an issue in the middle of a cold spell. Feel free to send an email if you're curious to ask more.