Review
The Mitsubishi Quad Zone H2i represents a mature approach to multi-zone heating and cooling without expensive ductwork modifications. This 42,000 BTU system connects four separate wall-mounted indoor units to a single outdoor compressor, delivering independent climate control for different rooms or zones. Built on Mitsubishi's established reputation for reliability, this unit bridges the gap between basic mini-splits and full commercial HVAC solutions.
Performance metrics impress across the board. The 21.5 SEER2 efficiency rating places this unit in the top tier of heat pump systems, translating directly to lower monthly utility bills. Cooling capacity reaches 42,000 BTU while heating output delivers 32,000 BTU, powered by R410A refrigerant. The EER rating of 13.4 confirms strong cooling performance even during peak summer demand periods. CFM output ranges from 109 to 399, accommodating varied duct velocities.
Pros & Cons
Pros
- Exceptional 21.5 SEER2 efficiency rating reduces operating costs by 15-20% versus standard units
- Hyper Heat technology maintains effective heating down to extreme cold temperatures
- Quad-zone configuration allows independent temperature control in four spaces with single outdoor unit
- Wireless controller included, eliminating additional control system expenses
- 42,000 BTU cooling capacity handles 3.5-ton loads for medium to large applications
- Single-phase 230V electrical compatibility simplifies installation in most residential and light commercial settings
Cons
- Heating BTU output drops to 32,000, a 24% reduction from cooling capacity, limiting performance in severe cold climates
- Specifications contain dimensional inconsistencies (height and width both listed as 0.5 inches), suggesting data entry errors
- Five-year parts warranty is standard but shorter than some premium competitors offering 10-year coverage
- Price listed as $0 prevents real value assessment against competing quad-zone systems
Who Should Buy
Best For
Contractors installing zoned systems in homes without ductwork, particularly in moderate climate zones where heating and cooling demands are balanced. Ideal for homeowners retrofitting older homes or those wanting precise temperature control across distinct living areas.
Consider Alternatives If
Properties in extreme cold climates where the 32,000 BTU heating output creates undersizing concerns, or buyers needing extended warranty coverage beyond five years.
Installation
Installation requires 40-45 amp breaker sizing, 230V single-phase electrical service, and 30 feet of pre-charged refrigerant line (included). Wall-mounted indoor units need 5/8-inch suction lines and 3/8-inch liquid lines connecting to the outdoor compressor. The HW-600 installation guide provides detailed setup procedures. Four separate zone connections demand careful planning for optimal airflow distribution across spaces.
Warranty & Reliability
Coverage includes five years of parts protection, standard across the mid-market heat pump category. This duration safeguards against compressor failure and component defects during the critical post-installation period. Extended warranty options may be available through dealers, though not specified in base documentation. Labor costs beyond warranty coverage fall on the homeowner.
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) | 19-45 |
| Weight (in lbs) | 30.000000 |
| 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 | 30' |
Frequently Asked Questions
Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.