Mitsubishi
MXZ-SM42NAMHZ Mitsubishi H2i Hyper-Heating 42,000 BTU 5-Zone Smart Multi Heat Pump Unit
Best multi-zone climate solution for homes in extreme cold climates.
Experience superior comfort year-round with the Mitsubishi MXZ-SM42NAMHZ, a 42,000 BTU Smart Multi Heat Pump Unit. Engineered with H2i® Hyper-Heating technology, it delivers exceptional heating performance even in extreme cold, maintaining capacity down to -13°F. This outdoor unit offers flexible zoning, supporting up to five indoor units for comprehensive climate control. Built for durability and quiet operation, it features seacoast protection and a base pan heater, ensuring reliable performance in challenging environments while maintaining a low sound level.
$5708.00
Owner Satisfaction
4.6
/ 5
Category Rank
33
/ 254
#33 in Climate Control Appliances
Price vs Category Average
+123%
Above average
Unit Type
3.5
/ -Ton Inverter Condenser
Who it's for
- Homeowners living in regions with harsh, freezing winters
- Families needing customized temperature settings for different rooms
- Budget-conscious buyers prioritizing long-term energy savings
Who should skip it
- Shoppers restricted by a limited upfront renovation budget
- Property owners without access to specialized HVAC installation experts
- Minimalists who prefer hidden or integrated climate control systems
Performance breakdown
Extreme Cold Performance
Hyper-Heating technology maintains full capacity even in sub-zero winter conditions.
Zoning Flexibility
Supports five independent zones for precise, room-by-room climate management.
Energy Efficiency
High SEER ratings ensure significant power savings during peak seasonal usage.
Acoustic Comfort
Whisper-quiet operation keeps outdoor noise levels remarkably low for residential areas.
Environmental Durability
Seacoast protection and base pan heaters guard against harsh, corrosive weather.
System Versatility
Broad compatibility across M-Series and P-Series units simplifies complex installation setups.
Key Specs
Unit Type
3.5-Ton Inverter Condenser
Cooling Capacity
42,000 BTU
Heating Capacity
48,000 BTU
Maximum Connectable Capacity
54,000 BTU
SEER Rating
up to 22.0
Minimum Heating Temperature
-24°F
Outdoor Noise Level
As low as 49 dB(A)
Refrigerant Type
R410A
Features
- Hyper-Heating for extreme cold performance
- Supports up to 5 indoor zones
- Seacoast protection for durability
- Built-in base pan heater prevents freezing
- Quiet outdoor unit operation
- High efficiency heating and cooling
- Smart Multi system compatibility
- Reliable in low ambient temperatures
What customers say
Customers overwhelmingly praise the Mitsubishi MXZ-SM42NAMHZ for its superior cold weather performance and quiet operation. The Hyper-Heating technology consistently delivers comfort and efficiency even in extreme cold, a significant advantage over standard heat pumps. Users value the 5-zone flexibility for personalized temperature control and energy savings. While the system offers excellent long-term value and reliability, reviewers note the substantial initial cost and the need for specialized installation as key considerations. Despite these hurdles, the consensus is that this unit provides unparalleled robust heating capability for those prioritizing high performance.
Know before you buy
The H2i technology is specifically engineered to maintain high heating capacity in extreme cold. It remains effective down to -13°F and can continue to operate in ambient temperatures as low as -24°F, making it a reliable primary heat source in harsh climates.
Yes, this unit is highly versatile and supports a mix of M-Series, P-Series, and CITY MULTI indoor units. This allows you to choose the specific style of indoor head—such as wall-mounted, ceiling cassette, or floor-mounted—that best fits each individual room.
With an outdoor noise level as low as 49 dB(A), this unit is designed for discreet operation. While it is significantly quieter than traditional central air condensers, it is still recommended to consult with your installer to ensure optimal placement away from sensitive areas.
The base pan heater prevents condensate from freezing at the bottom of the unit during cold weather. This is a critical feature that protects the unit from ice buildup, ensuring consistent performance and preventing potential damage to the fan or internal components.
Yes, the unit features specialized seacoast protection designed to resist the corrosive effects of salt air. This coating significantly extends the lifespan of the outdoor unit when installed in coastal environments where standard equipment might otherwise degrade quickly.
This multi-zone system supports up to five indoor units. It is important to note that the total capacity of the connected indoor units can reach up to 54,000 BTU, allowing you to customize the climate control for different areas of your home simultaneously.
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