Review
The Mitsubishi MSZ-GS24NA is a premium 24,000 BTU indoor wall-mounted unit designed for multi-zone systems requiring reliable heating in demanding climates. As part of a five-zone configuration, this 2-ton capacity unit handles significant heating and cooling loads while delivering exceptional efficiency. It replaces the older MXZ-5C42NAHZ2 model with meaningful performance improvements. This unit targets contractors and homeowners serious about hyper-heat technology and energy savings, particularly in regions where winter temperatures regularly dip below 32 degrees Fahrenheit.
Performance numbers are genuinely impressive for a wall-mounted mini-split unit. The 21.5 SEER2 rating substantially outpaces standard 13-15 SEER2 systems, translating to real savings on cooling bills. Heating capacity reaches 27,600 BTU compared to 22,400 BTU cooling output, making this unit a net heating performer. The 13.4 EER rating ensures efficient operation during peak summer demand. Operating ranges span 336-701 CFM in heating and 361-701 CFM in cooling, with noise between 32-53 dBA depending on mode and fan speed selection.
Pros & Cons
Pros
- Exceptional 21.5 SEER2 rating significantly reduces cooling energy costs compared to standard units
- 27,600 BTU heating output provides substantial warm-air capacity for sub-freezing climates
- Hyper Heat technology maintains efficiency even in extreme cold conditions, eliminating need for electric resistance backup
- 13.4 EER rating ensures strong performance during peak cooling demand periods
- Includes wireless controller standard, avoiding retrofit costs for smart climate control
- 10-year warranty with online registration provides long-term protection for indoor investment
Cons
- Single 24,000 BTU unit requires outdoor condenser matching, limiting retrofit flexibility on existing systems
- Noise levels reach 53 dBA in cooling mode, noticeable in quiet living spaces or bedrooms
- 50-amp amperage requirement demands substantial electrical infrastructure in some older homes
- Wall-mounted design cannot serve as discreet closet or attic installation option
Who Should Buy
Best For
Homeowners in northern climates or regions with below-freezing winters who want hyper-heat capability without auxiliary electric heating. This unit is ideal for new construction or comprehensive HVAC upgrades where matching outdoor units are feasible.
Consider Alternatives If
Budget-conscious buyers unable to afford the matched condenser unit, or those in mild climates where standard SEER ratings provide adequate performance at lower cost.
Installation
Installation requires 208/230V single-phase power with a minimum 40-amp breaker and maximum 45-amp breaker size, though 50-amp amperage is required operationally. The 1/4-inch liquid line and 5/8-inch suction line connect to a matched outdoor condenser unit. Dimensions of 43.31 inches wide by 12.81 inches high require careful wall placement in finished spaces. Professional installation is essential for proper refrigerant charge and electrical configuration.
Warranty & Reliability
Mitsubishi provides 10 years of coverage with free online registration, protecting against manufacturing defects in compressor, valves, and electrical components. This extended warranty period demonstrates manufacturer confidence in unit longevity. Registration is straightforward and highly recommended, as it activates the full coverage period.
Specifications
| SKU | MSZ-GS24NA |
| Brand/Manufacturer | Mitsubishi |
| Cooling BTU | 22,400 BTU |
| Heating BTU | 27,600 BTU |
| Refrigerant | R410A |
| Electrical | 208/230v 1 Phase 60 Hz |
| BTU/Tonnage | 24,000 BTU/2 Ton |
| Mini Split Type | Wall Mounted |
| Zone Compatibility | Multi Zone |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | C: 34-53 & H: 32-52 |
| Weight (in lbs) | 37.000000 |
| Feature | Spec |
| Replaces | MXZ-5C42NAHZ2 |
| Product Features | Hyper Heat |
| SEER2 (Efficiency) | 21.5 |
| EER | 13.4 |
| Liquid Line | 1/4" |
| Suction Line | 5/8" |
| Max Breaker Size | 45 amps |
| Min. Breaker Size | 40 |
| Amperage Requirement | 50 |
| Height | 12-13/16" |
| Width | 43-5/16" |
| Depth | 9-3/8" |
| Resources | Submittal Service Manual Parts Manual Operation Manual Installation Manual Engineering Data You will need Adobe® Acrobat® Reader to view PDF documents. |
| Safety Information | PROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here. |
| Controller | Wireless Included |
| Additional Information | Drain: 5/8" |
| Maximum CFM | C: 361-701 & H: 336-701 |
| Capacity | Dehumidification Rate: 0.77 gal/hr |
| Operating Mode | Cooling, Heating |
| Phase | Single Phase |
Frequently Asked Questions
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