Review
The Mitsubishi 42,000 BTU Five Zone Mini Split H2i Hyper Heat Pump System targets the competitive retrofit market where multi-zone coverage matters. This wall-mounted configuration handles five separate zones with a 6+6+6+9+9 ton modular design, letting contractors customize capacity distribution across residential layouts. The Hyper Heat branding signals cold-climate capability, addressing a real pain point for northern installers. Online Supply positions this unit as a direct replacement for the MXZ-5C42NAHZ2, leveraging existing Mitsubishi reputation.
Performance metrics reveal a genuinely efficient system. The 19 SEER rating translates to real-world energy use that runs 15 to 20 percent below older mini splits. SEER2 climbs to 21.5 when measured against updated testing standards, while the EER of 13.4 ensures consistent cooling even at peak outdoor temperatures. Heating output settles at 32,000 BTU, adequate for zone supplementation but not primary residential heating in extreme cold. Operating across 19 to 43 dBA keeps occupant comfort high during low-load periods.
Pros & Cons
Pros
- Exceptional SEER2 rating of 21.5 and EER of 13.4 delivers measurable energy savings on monthly bills
- Hyper Heat technology maintains heating output at temperatures as low as minus 13 degrees Fahrenheit
- Five-zone configuration covers multiple rooms with modular 6+6+6+9+9 ton capacity distribution
- Wireless controller included with purchase, eliminating retrofit wiring complexity
- 230V single-phase 60Hz electrical requirement simplifies installation on standard residential panels
Cons
- 32,000 BTU heating output trails cooling capacity significantly, limiting summer-to-winter balance
- Five-year parts warranty is standard but shorter than premium competitors offering seven to ten years
- Decibel range of 19 to 43 dBA means low-speed operation stays quiet but high-speed cooling can intrude on living spaces
Who Should Buy
Best For
Contractors installing multi-zone systems in older homes across the Northeast and Midwest will appreciate the heating performance and straightforward electrical requirements. Homeowners in climate zones where winter heating rivals summer cooling will find the Hyper Heat feature justifies the investment.
Consider Alternatives If
Buyers seeking a single-zone system or those in consistently warm climates should evaluate units with higher cooling-to-heating ratios and lower upfront complexity.
Installation
This system requires 230V single-phase 60Hz service with a 40 to 45 amp breaker, fitting typical residential panels without upgrades. The 5/8-inch suction line, 3/8-inch liquid line, and 5/8-inch drain accommodate standard refrigerant runs up to 15 feet. Wireless controller inclusion eliminates extra thermostat wiring, cutting installation time by two to four hours compared to hardwired alternatives. Wall-mount design works for most living spaces.
Warranty & Reliability
Mitsubishi backs the system with a five-year parts warranty covering defects in materials and workmanship. This standard coverage protects against compressor failure and refrigerant leaks but excludes labor and system-specific maintenance. Extended warranty options may be available through distributors, worth exploring for long-term ownership 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) | 19-43 |
| Weight (in lbs) | 15.000000 |
| Feature | Spec |
| Controller | Wireless Included |
| Additional Information | Drain: 5/8" |
| Maximum CFM | 109-406 CFM |
| Capacity | Dehumidification Rate: 0.23 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. |
| 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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