There are a few stereotypes to heating installation, but this is an exception when it comes to how cold heat pumps will work, though. There are some heat pumps that will work below freezing. For example, there are Mitsubishi H2i heat pumps, which use Hyper-Heat INVERTER technology. Using a powerful pump unit and a special “flash injection” circuit that injects more refrigerant into the system, these Mitsubishi heat pumps deliver up to 76% efficiency at outdoor temperatures as low as -13° F, and 100% efficiency at temperatures between 0° F and 5° F. In contrast, most conventional heat pumps won’t work at all at temperatures that are this low.You mean the one that doesn't work well in colder climates...like let's say Canada?