Mitsubishi MXZ-SM48NL 48,000 BTU Smart Multi Heat Pump Unit - 454B
- $5773
- $5658.00
Introducing the Mitsubishi 48,000 BTU Multi-Zone Outdoor Unit MXZ-SM48NL , a powerful and versatile heat pump designed to provide precise, efficient, and quiet heating and cooling for up to eight zones. Leveraging Mitsubishi’s trusted INVERTER technology, the MXZ-SM48NL ensures year-round comfort with exceptional flexibility for larger residential or light commercial applications. This model requires a compatible Mitsubishi branch box when paired with M- or P-Series indoor units.
The MXZ-SM48NL delivers a maximum cooling capacity of 48,000 BTU/h and a maximum heating capacity of 50,000 BTU/h at 47°F , making it ideal for demanding climates. Even in colder weather, it maintains strong performance—providing 43,000 BTU/h at 17°F , 35,400 BTU/h at 5°F , and continued operation down to -13°F . With efficiency ratings reaching SEER2 up to 23 , HSPF2 up to 10.4 , and COP values up to 4.0 at 47°F , it meets ENERGY STAR® standards in non-ducted configurations.
Built for durability, the MXZ-SM48NL features Blue Fin anti-corrosion coating on the heat exchanger and base panel, rated for 2,000 hours of salt-spray exposure per ASTM B117 testing. A twin rotary INVERTER-driven compressor (model MRB36FEGMC-L) modulates output to match demand, while keeping noise levels low—51 dB(A) in cooling and 54 dB(A) in heating . The unit’s Munsell 3Y 7.8/1.1 finish offers a clean, professional look, and an optional base pan heater is available for enhanced cold-weather operation.
Installation flexibility is unmatched, supporting piping runs up to 492 ft total with a branch box (787 ft without) and a maximum height difference of 164 ft between outdoor and indoor units. The MXZ-SM48NL can connect to up to eight indoor units with a branch box , with a maximum connected capacity of 62,400 BTU/h. It comes pre-charged with 2 lbs. 11 oz. of R454B refrigerant for quick installation.
Safety and reliability are ensured with built-in compressor overcurrent detection, compressor thermal protection, fan motor overheating/voltage protection, and high-pressure safety controls. Despite its capacity, the MXZ-SM48NL retains a compact footprint of 41-11/32" W x 13" D x 52-11/16" H and a weight of 250 lbs , making it manageable for installation in a range of spaces.
Whether cooling expansive areas in summer or delivering dependable heating through harsh winters, the Mitsubishi MXZ-SM48NL offers powerful, efficient, and whisper-quiet multi-zone performance—perfect for homeowners or businesses seeking reliable climate control for multiple zones.
MXZ-SM48NL Specifications Table
| Category | Specification |
|---|---|
| Model Number | MXZ-SM48NL |
| Type | Multi-Zone Heat Pump Outdoor Unit |
| Cooling Capacity (Max / Rated / Min) | 48,000 / 48,000 / 15,000 BTU/h |
| Heating Capacity @47°F (Max / Rated / Min) | 50,000 / 50,000 / 13,000 BTU/h |
| Heating Capacity @17°F (Max / Rated) | 43,000 / 31,400 BTU/h (Non-Ducted) |
| Heating Capacity @5°F (Max) | 35,400 BTU/h |
| Heating Capacity @-13°F (Max) | 22,800 BTU/h |
| SEER2 (Non-Ducted / Mixed / Ducted) | 23.0 / 20.0 / 17.0 |
| HSPF2 (Non-Ducted / Mixed / Ducted) | 10.4 / 9.95 / 9.5 |
| COP @47°F (Non-Ducted / Mixed / Ducted) | 4.00 / 3.55 / 3.10 |
| COP @17°F Max (Non-Ducted / Mixed / Ducted) | 2.00 / 1.88 / 1.76 |
| COP @5°F Max (Non-Ducted / Mixed / Ducted) | 2.10 / 2.02 / 1.96 |
| ENERGY STAR® Certified | Yes / No / No |
| Sound Pressure Level (Cooling / Heating) | 51 dB(A) / 54 dB(A) |
| Compressor Type / Model | Twin Rotary / MRB36FEGMC-L |
| Refrigerant / Charge | R454B / 2 lbs. 11 oz. |
| Dimensions (W x D x H) | 41-11/32" x 13" x 52-11/16" |
| Weight (Net / Shipping) | 250 lbs / 276 lbs |
| Max # of Indoor Units (With Branch Box) | 8 |
| Max Total Piping Length (With Branch Box) | 492 ft (150 m) |
| Max Height Difference (ODU above IDU) | 164 ft (50 m) |
| Operating Range (Cooling) | 23°F – 115°F |
| Operating Range (Heating) | -13°F – 70°F |
| Finish Color | Munsell 3Y 7.8/1.1 |
| Branch Box Requirement | Yes (required for M- and P-Series) |
| Base Pan Heater | Optional |
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