It's entirely possible? Mitsubishi makes a bunch of different models, and ours is a cheaper one. Our area rarely gets under 0, so it's understandable why the la

It's entirely possible? Mitsubishi makes a bunch of different models, and ours is a cheaper one. Our area rarely gets under 0, so it's understandable why the landlords chose this model (and it's also an older model, for an older apartment). They have other models rated down to -15 or lower. But even if it's because the defroster stopped working, or it's just an auto-shutoff feature to keep the equipment safe... the end effect is the same: There is no more heat when you most need it, and you'll freeze. We were wrapped up in multiple layers that day and tried to warm the house however we could, but ended up just needing to stay with a friend cuz it was so cold. In some areas, "two sources of home heating" is mandated by law, but not where I live now. It still seems like good advice, specially if you can do that with two separate fuel sources (like electricity vs natural gas vs propane vs heating oil), in case one infrastructure goes down, as they often do during the worst storms.