Mitsubishi 20,000 BTU multi-zone hyper heat outdoor heat pump (MXZ-2C20NAHZ). This is an extremely efficient unit that can connect to a variety of indoor unit types and can handle two zones (indoor units).

Unit Type 1.66-Ton Inverter Condenser Heat Pump
Product Line M-Series Hyper Heat
Operating Mode Cooling & Heating
Low Ambient Heat: YES
Number of Zones 2
Unit Capacity 20,000 BTU

Outdoor Unit MXZ-2C20NAHZ

Cooling Capacity up to 20,000 BTU
Heating Capacity up to 25,500 BTU
SEER Up to 17.1
EER Up to 14.3
HSPF Up to 10.0
Heating Minimum Temp -14 F
Cooling Minimum Temp 14 F

This outdoor unit allows you to connect a wide variety of indoor units ranging up to a 15k BTU indoor unit.
Hyper-heating performance offers 100% heating capacity at 5°F and 93% heating capacity at -13°F
Blue Fin anti-corrosion treatment applied to heat exchanger for increased coil protection and longer life.
The outdoor unit powers the indoor units, and should a power outage occur, the system is automatically restarted when power returns.
Quiet outdoor unit operation
Intelligent Power Module (IPM) for reduced power loss
High pressure switch for additional protection
Compressor and Fan motor overheating/voltage protection
High pressure protection