Review
The Mitsubishi 42,000 BTU five-zone H2i Hyper Heat pump system represents a solid mid-tier option for contractors managing multi-zone residential installations. This model splits capacity across five zones (9+9+9+12+12 BTU distribution), allowing independent temperature management for different areas of a home. The 19 SEER rating positions it as an efficiency leader in the split heat pump category. Mitsubishi's reputation for reliability and this unit's Hyper Heat technology make it a credible choice for homeowners seeking both comfort and operational cost control over a system's 15+ year lifespan.
Performance metrics are impressive across the board. The system delivers 42,000 BTU cooling and 32,000 BTU heating capacity with a 21.5 SEER2 rating and 13.4 EER, meaning it converts electrical input to conditioned air very efficiently. The 109-399 CFM range and 19-45 dB noise range indicate quiet operation even at full load. Operating on single-phase 230V power with a 50-amp requirement keeps electrical demands manageable for most homes. The included wireless controller adds convenience without extra cost, and R410A refrigerant ensures compatibility with modern service infrastructure.
Pros & Cons
Pros
- 19 SEER efficiency rating delivers lower operating costs compared to 16-17 SEER competitors
- Hyper Heat technology maintains output down to extremely low outdoor temperatures for reliable winter performance
- 42,000 BTU cooling capacity handles 3.5-ton loads across five independent zones with individual temperature control
- Wireless controller included, eliminating additional smart thermostat expenses
- 5-year parts warranty covers compressor and major components against manufacturing defects
- 21.5 SEER2 and 13.4 EER ratings confirm strong efficiency in both cooling and heating modes
Cons
- 32,000 BTU heating output falls short of the 42,000 BTU cooling capacity, limiting load balance in very cold climates
- Single 230V phase operation with 50-amp requirement may need electrical panel upgrades in older homes
- Wall-mounted indoor units require visible mounting, which some homeowners find aesthetically limiting
- Listed price of $0 appears to be a data entry error, preventing accurate value assessment
Who Should Buy
Best For
Contractors installing multi-zone systems in residential homes across 5 separate rooms or zones where consistent heating and cooling are priorities. Homeowners in moderate climates seeking long-term energy savings through high SEER efficiency and the ability to heat and cool different areas independently.
Consider Alternatives If
Anyone in regions with sustained sub-zero winter temperatures should verify Hyper Heat performance specs, and buyers needing a single-zone system should consider more compact alternatives.
Installation
Installation requires single-phase 230V with 40-45 amp breaker sizing, standard for residential HVAC. The five wall-mounted indoor units need refrigerant line runs (3/8-inch liquid, 5/8-inch suction) and electrical connections to the outdoor condenser. A 5/8-inch drain line handles condensate from each zone. Professional installation is strongly recommended to ensure proper charge, refrigerant line insulation, and electrical safety compliance.
Warranty & Reliability
The 5-year parts warranty covers defects in compressors, heat exchangers, and other major components. This is solid coverage for residential use but shorter than some competitors offering 7-10 years. Warranty registration may be required, and labor costs for repairs fall on the homeowner. Extended warranties are often available through retailers for added peace of mind.
Specifications
| SKU | 201813 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 32,000 |
| Refrigerant | R410A |
| Electrical | 230 V. 1 Phase 60 Hz |
| BTU/Tonnage | 42,000 BTU/3.5 Ton |
| Mini Split Type | Wall Mounted |
| Zone Compatibility | Multi Zone |
| Warranty | 5 Years Parts Warranty |
| Decibel Level (dBA) | 19-45 |
| Weight (in lbs) | 15.000000 |
| Feature | Spec |
| Controller | Wireless Included |
| Additional Information | Drain: 5/8" |
| Maximum CFM | 109-399 CFM |
| Capacity | Dehumidification Rate: 0.38 gal/hr |
| Liquid Line | 3/8" |
| Suction Line | 5/8" |
| Operating Mode | Cooling, Heating |
| Height | 1/2" |
| Width | 1/2" |
| Depth | 38" |
| Resources | HW-600 Install Guide 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. |
| Phase | Single Phase |
| Replaces | MXZ-5C42NAHZ2 |
| Product Features | Hyper Heat |
| SEER2 (Efficiency) | 21.5 |
| EER | 13.4 |
| Max Breaker Size | 45 amps |
| Min. Breaker Size | 40 |
| Amperage Requirement | 50 |
| Length | 15' |
Frequently Asked Questions
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