Review
The Mitsubishi 42,000 BTU Quad Zone H2i mini split represents a competent mid-range solution for homeowners seeking efficient climate control across multiple zones. This wall-mounted system ships with wireless controls and operates on standard 230V single-phase residential electrical service. The quad-zone configuration with 9, 12, 12, and 15-thousand BTU capacity splits addresses the real-world challenge of maintaining different temperatures across bedrooms, living areas, and home offices without complex ductwork.
Performance metrics indicate solid efficiency across heating and cooling cycles. The 21.5 SEER2 rating places this unit in the upper efficiency tier for residential heat pumps, while the 13.4 EER handles cooling load effectively. Heating output reaches 32,000 BTU through Hyper Heat technology, making cold-climate operation viable without supplemental electric resistance. Sound levels range from 26 to 49 decibels for cooling and 26 to 46 decibels for heating, staying within acceptable indoor noise thresholds. CFM output varies between 191 and 504 for cooling, providing flexibility for different room sizes.
Pros & Cons
Pros
- 21.5 SEER2 efficiency rating significantly exceeds ENERGY STAR minimum of 16 SEER2 for regional standard-efficiency units
- Hyper Heat technology delivers 32,000 BTU heating output, enabling reliable cold-climate operation without supplemental resistance heat
- Quad-zone capability with 9, 12, 12, and 15-thousand BTU indoor units allows independent temperature control across four separate spaces
- Wireless controller included, eliminating need for hardwired thermostat installation and reducing labor costs
- 13.4 EER rating provides excellent cooling efficiency during peak summer demand periods
- Single-phase 230V electrical requirement accommodates standard residential service without upgrade expenses
Cons
- Price listed as $0 on vendor page, suggesting data error or placeholder pricing that requires direct contact for actual cost
- 5-year parts warranty is standard industry coverage but falls short of premium brands offering 7-10 year extended protection
- Height and width specs show 0.5 inches, which appears to be data entry errors preventing accurate wall clearance planning
- 42,000 BTU cooling capacity may underscore larger homes or poorly insulated spaces requiring 5+ tons of capacity
Who Should Buy
Best For
Homeowners in cold-climate regions with 4 distinct zones needing independent temperature control and reliable heating performance. Contractors serving multi-unit residential properties or homes with separate living wings will appreciate the zoning flexibility and reduced thermostat installation complexity.
Consider Alternatives If
Buyers requiring pricing transparency before evaluation should contact the vendor directly, as the $0 listing appears to be a system error rather than actual product cost.
Installation
Installation requires 230V single-phase 60Hz electrical service with 40 to 45-amp breaker capacity and 50-amp circuit amperage. The system uses standard R410A refrigerant lines with 3/8-inch liquid and 5/8-inch suction connections. Wall-mounted indoor units need 5/8-inch drain lines for condensate removal. An outdoor unit connects via refrigerant piping to all four zones. Most contractors complete installation in one day, though electrical upgrades may extend timeline if home lacks adequate breaker capacity.
Warranty & Reliability
Mitsubishi provides a 5-year parts warranty covering compressor, coils, and components. This standard-level coverage protects against manufacturing defects but excludes normal wear, refrigerant loss from leaks, and labor costs. Extended warranty options may be available through dealers. Document all service records to preserve warranty validity.
Specifications
| SKU | 216740 |
| 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) | C: 26-49 & H: 26-46 |
| Weight (in lbs) | 30.000000 |
| Feature | Spec |
| Controller | Wireless Included |
| Additional Information | Drain: 5/8" |
| Maximum CFM | C: 191-504 & H: 191-437 |
| Capacity | Dehumidification Rate: 0.41 gal/hr |
| Liquid Line | 3/8" |
| Suction Line | 5/8" |
| Operating Mode | Cooling, Heating |
| Height | 1/2" |
| Width | 1/2" |
| Depth | 38" |
| Resources | Surge Protector 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 | 30' |
Frequently Asked Questions
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