Mitsubishi 42,000 BTU multi-zone outdoor heat pump (MXZ-5C42NA). This is an extremely efficient unit that can connect to a variety of indoor unit types and can handle three zones (indoor units).

Unit Type 3.5-Ton Inverter Condenser Heat Pump
Product Line M-Series
Operating Mode Cooling & Heating
Low Ambient Heat: NO
Number of Zones 5
Unit Capacity 40,500 BTU

Outdoor Unit MXZ-5C42NA

Cooling Capacity up to 43,000 BTU
Heating Capacity up to 53,600 BTU
SEER2 Up to 19.7
EER2 Up to 9.2
HSPF2 Up to 10.3
Heating Minimum Temp 5 F
Cooling Minimum Temp 14 F

This outdoor unit allows you to connect a wide variety of indoor units ranging up to 53,300 BTU.
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

Noise Level Cooling: 56 dB(A)
Noise Level Heating: 58 dB(A)
Size W x D x H: 37-13/32" x 13" x 41-17/64"
Weight: 189 lbs
Electrical: 208/230V, 20A
Total Piping Length: 230 ft
Pre-charged up to: 98 ft