Review
The Mitsubishi MXZ-SM36NAMHZ replacement quad zone system represents a thoughtful balance between heating and cooling performance for challenging climates. At 36,000 BTU cooling capacity with 23 SEER2 efficiency, this wall-mounted mini split delivers respectable cooling power while maintaining exceptional energy performance. The quad zone configuration splits capacity as 9+9+9+15, enabling homeowners to prioritize comfort in specific rooms rather than conditioning entire homes uniformly.
Where this system truly distinguishes itself is heating performance. The 11 HSPF rating and Hyper Heat technology allow the unit to extract warmth from outdoor air even during severe cold snaps, delivering 33,000 BTU of heating output. The 15 EER cooling efficiency rating performs well for mini splits, while the 49 dB operating noise level keeps the system whisper-quiet during both seasons. Single phase 230V operation with 40-45 amp breaker requirements puts it within reach of most residential electrical panels.
Pros & Cons
Pros
- Exceptional heating efficiency with 11 HSPF and Hyper Heat technology for subzero performance
- Strong cooling capacity at 36,000 BTU with 23 SEER2 rating, well above minimum efficiency standards
- Flexible quad zone configuration (9+9+9+15) allows independent temperature control across four separate spaces
- Quiet operation at 49 dB, similar to conversation level noise
- Wireless controller included, reducing installation complexity and improving user experience
Cons
- Relatively modest cooling output at 36,000 BTU may require supplemental units for larger homes
- Requires 40-45 amp breaker and 230V single phase power, necessitating potential electrical upgrades
- Five year parts warranty is solid but not exceptional compared to some competitors offering 10 year coverage
Who Should Buy
Best For
Homeowners in cold climate zones who need efficient heating and cooling across multiple rooms without central ducting. This system is ideal for additions, retrofits, or homes where zoning provides significant comfort and energy savings.
Consider Alternatives If
Anyone with a single large space needing maximum cooling capacity should consider higher BTU units, and those unwilling to invest in electrical infrastructure upgrades may face installation barriers.
Installation
Installation involves mounting four wall units at optimal heights, running refrigerant lines up to 15 feet between outdoor and indoor components, and connecting 5/8 inch suction and 3/8 inch liquid lines. The included wireless controller eliminates complex wiring for zone management. Most installations require a qualified HVAC technician due to refrigerant handling and electrical integration demands.
Warranty & Reliability
Coverage extends five years on parts, protecting against manufacturing defects and component failures. Labor and installation costs typically fall outside this coverage. For a system expected to operate 15-20 years, this warranty provides solid baseline protection, though some competitors offer extended terms worth comparing before purchase.
Specifications
| SKU | 201813 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 36,000 |
| Heating BTU | 33,000 |
| Refrigerant | R410A |
| Electrical | 230 V. 1 Phase 60 Hz |
| BTU/Tonnage | 36,000 BTU/3 Ton |
| Mini Split Type | Wall Mounted |
| Zone Compatibility | Multi Zone |
| Warranty | 5 Years Parts Warranty |
| Decibel Level (dBA) | 49 |
| Weight (in lbs) | 15.000000 |
| 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-SM36NAMHZ |
| Product Features | Hyper Heat |
| HSPF | 11 |
| SEER2 (Efficiency) | 23 |
| EER | 15 |
| Max Breaker Size | 45 amps |
| Min. Breaker Size | 40 amps |
| Amperage Requirement | 50 |
| Length | 15' |
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.