The Mitsubishi 42,000 BTU low temperature multi-zone outdoor heat pump (MXZ-SM42NAMHZ*) is an extremely efficient heating and cooling option that can handle five zones at significantly lower temperature levels.
This specific outdoor unit allows you to connect a wide variety of indoor units that can range up to 5 with the branch box or up to 12 without the branch box (City Multi). The MXZ-SM42NAMHZ* is part of Mitsubishi's Smart Multi Series, catering to residential or commercial applications. This outdoor unit is perfect for customers located in regions that experience consistent sub 0 temperatures.

Unit Type: 3.5-Ton Inverter Condenser
Product Line: Smart Multi Series
Operating Mode: Cooling & Heating
Low Ambient Heat: Yes (Hyper-Heating)
Number of Zones: 5 (with branch box) or 12 (without branch box)
Unit Size: 42,000 BTU
Required Install Kit: Branch Box (M_P Series)

Outdoor Unit MXZ-SM42NAMHZ*

Cooling Capacity 42,000 BTU
Heating Capacity 48,000 BTU
Connectable Capacity 54,000 BTU
SEER: up to 22.0
EER: up to 13.4
HSPF: up to 12.0
Heating Minimum Temp -24 F
Cooling Minimum Temp 5 F (with wind baffle)
Room Cooling/Heating Capacity up to 1750 sq ft

Compatible with M- and P-Series and CITY MULTI indoor units. Branch box required for connection with M- and P-Series
Seacoast protection on heat exchanger and base panel (rated for 2,000 hrs in accordance with ASTM B117 testing)
Built-in base pan heater
Quiet outdoor unit operation, sound pressure as low as 49 dB(A)
Hyper-heating performance offers 100% heating capacity at 5°F, and 75% heating capacity at -13°F