Review
The Daikin MXS 18.9 SEER2 dual-zone mini split positions itself as a practical mid-market solution for homeowners and contractors seeking multi-zone climate control without flagship pricing. This 18,000 BTU system (9,000 per zone) combines 230V single-phase operation with wall-mounted indoor units, making it adaptable to various residential layouts. At $1,526.40, it undercuts premium brands while maintaining respectable efficiency credentials and Daikin's established service reputation.
Performance metrics justify this system's positioning. The 18.9 SEER2 rating delivers substantial energy savings compared to standard equipment, while the 12.5 HSPF heating efficiency supports moderate climates effectively between 5°F and 60°F outdoor temperatures. Operating noise spans 22-58 dBA depending on configuration, with the quietest setting suitable for noise-sensitive environments. The 12.7 EER cooling coefficient indicates solid part-load efficiency during mild weather operation.
Pros & Cons
Pros
- 18.9 SEER2 rating exceeds ENERGY STAR requirements, reducing operational costs significantly over the unit's lifespan
- HSPF of 12.5 provides excellent heating performance, useful in moderate climates down to 5°F outdoor temperatures
- Dual-zone wall-mounted design serves two independent spaces simultaneously from a single outdoor compressor unit
- Quiet operation ranges from 22-58 dBA depending on fan speed, making it suitable for bedrooms and offices
- 12-year warranty with online registration provides extended coverage against manufacturer defects
Cons
- Precharged refrigerant line limited to 98 feet, restricting placement flexibility between indoor and outdoor units
- Swing compressor type is less efficient than rotary designs in some high-load scenarios
- Minimum 15.8 amp breaker requirement necessitates dedicated 230V electrical circuit, adding installation costs
Who Should Buy
Best For
Homeowners with two separate rooms or small commercial spaces needing simultaneous heating and cooling will appreciate the dual-zone capability and efficiency. Contractors seeking a reliable, mid-range system for multi-zone residential retrofits will find this Daikin unit delivers good performance at competitive pricing.
Consider Alternatives If
Properties with outdoor unit placement beyond 98 feet from indoor units or those requiring operation below 5°F should explore alternative systems with extended refrigerant precharged lengths or enhanced cold-climate performance.
Installation
Installation demands a dedicated 230V circuit with 15.8 to 20 amp breaker capacity. The precharged refrigerant line accommodates up to 98 feet of copper tubing between outdoor and indoor units. Wall-mounted interior units measure 31.5 inches wide by 11.625 inches tall, requiring level surface mounting. Professional installation is strongly recommended given electrical requirements and refrigerant handling protocols.
Warranty & Reliability
Daikin provides 12 years of manufacturer defect coverage when you register online. This extended warranty is competitive within the mid-tier segment and reflects confidence in component longevity. Coverage typically includes compressor and sealed system components, though homeowners should verify specific terms with their installer before purchase.
Specifications
| SKU | FTXS09WVJU9 |
| Brand/Manufacturer | Daikin |
| Cooling BTU | 9000 |
| Heating BTU | 9000 |
| Refrigerant | R410A |
| Electrical | 208/230v 1 Phase 60 Hz |
| BTU/Tonnage | 9,000 BTU/0.75 Ton |
| Mini Split Type | Wall Mounted |
| Zone Compatibility | Multi Zone |
| Warranty | 12 Years with Online Registration |
| Decibel Level (dBA) | 22-58 |
| Weight (in lbs) | 20.000000 |
| Feature | Spec |
| Refrigerant Charge | precharged for: 98' |
| AHRI Certificate Number | 8103477, 8103542, 8104492 |
| Additional Information | Drain: 5/8" |
| Energy Star | Yes |
| HSPF | 12.5 |
| EER | 12.7 |
| Compressor Type | Swing |
| Liquid Line | 1/4" |
| Suction Line | 3/8" |
| Max Breaker Size | 20 Amps |
| Min. Breaker Size | 15.8 Amps |
| Amperage Requirement | 20 |
| Min/Max Outdoor Temp for Heating | 5°F - 60°F |
| Min/Max Outdoor Temp for Cooling | 14°F - 115°F |
| Height | 11-5/8" |
| Width | 31-1/2" |
| Depth | 8-7/16" |
| Resources | Submittal Installation Manual Operation Manual 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. |
| Maximum CFM | 145-420 CFM |
Frequently Asked Questions
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