Mitsubishi Electric’s patented heat transfer capabilities allow the Hyper-Heating (H2i®) M-Series system to operate at 100 percent heating capacity at 5°F outdoor ambient. It has a SEER rating of 30.5. According to the company, the Hyper-heating technology often eliminates the need for a separate heating product, saving installation time and improving energy efficiency without relying on fossil fuels.
Source: ACHR News (a part of news report)