If it's very cold, yes. But the average should still be well above 3: > Similarly, in Finland, tests of air-to-air heat pump systems from various manufacturers

If it's very cold, yes. But the average should still be well above 3: > Similarly, in Finland, tests of air-to-air heat pump systems from various manufacturers resulted in COPs of 3 at -10C and 2 at -20C. Source: https://www.carbonbrief.org/guest-post-how-the-energy-crisis-is-boosting-heat-pumps-in-europe/ https://www.carbonbrief.org/guest-post-how-the-energy-crisis...