Review
The Daikin MXS 18 SEER2 dual-zone mini split represents a smart middle ground between window units and full central systems. This wall-mounted configuration delivers heating and cooling to two separate zones independently, making it attractive for apartments, converted spaces, and homes where ductwork installation isn't practical. Daikin's reputation for reliability combined with the 18 SEER2 efficiency rating positions this unit competitively in the premium mini-split category.
Performance numbers tell the real story here. Each zone handles 9,000 BTU cooling and heating output, with an impressive 12.7 EER for cooling efficiency and 11.7 HSPF for heating down to 5°F outdoors. The 145 to 420 CFM airflow range provides flexibility for different room sizes, while the 22 to 58 decibel range keeps noise levels acceptable. Operating temperatures cap at 60°F for heating and 115°F for cooling, establishing clear seasonal boundaries for this unit's effectiveness.
Pros & Cons
Pros
- 18 SEER2 energy rating delivers top-tier cooling efficiency with documented AHRI certification (210722661, 210725097, 210800985)
- 11.7 HSPF heating efficiency performs well down to 5°F outdoor temperature, suitable for mixed climates
- Dual-zone capability allows independent control of two rooms from single outdoor unit, reducing installation complexity
- Compact wall-mount design with 31.5-inch width fits tight spaces better than traditional mini splits
- 12-year warranty with online registration provides solid long-term protection for major component failure
Cons
- 9,000 BTU per zone limits application to small rooms or supplemental heating, not whole-home solutions
- Precharged for 131 feet maximum run length restricts placement flexibility in larger homes
- Operating range stops at 60°F outdoor temperature for heating, requiring backup heat in colder climates
- Swing compressor design generally quieter than rotary but less efficient at partial load operation
Who Should Buy
Best For
Homeowners with two separate small rooms or apartments needing independent climate control, and contractors installing efficient supplemental heat in homes without central ducts. This system excels in new construction or renovation projects where wall mounting works structurally.
Consider Alternatives If
Anyone needing whole-home heating and cooling should look at larger capacity systems or traditional central air, as dual 9,000 BTU zones will struggle with open floor plans or large living spaces.
Installation
Installation requires standard 208/230V, 1-phase 60Hz power with a 25-amp breaker and 21.9-amp minimum service. Refrigerant lines come precharged for 131 feet maximum run, with 1/4-inch liquid line and 3/8-inch suction line connections. Wall mounting is straightforward, though proper insulation and condensate drainage through the 5/8-inch drain line are critical for long-term reliability. Professional installation strongly recommended.
Warranty & Reliability
Daikin includes 12 years of parts coverage when you register the unit online, which is one of the longest warranties in the mini-split market. This extended protection covers compressor failures and major components, though labor and refrigerant recharge costs typically fall on the homeowner. Registration is quick and provides valuable documentation for resale.
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: 131' |
| AHRI Certificate Number | 210722661, 210725097, 210800985 |
| Additional Information | Drain: 5/8" |
| Energy Star | Yes |
| HSPF | 11.7 |
| EER | 12.7 |
| Compressor Type | Swing |
| Liquid Line | 1/4" |
| Suction Line | 3/8" |
| Max Breaker Size | 25 Amps |
| Min. Breaker Size | 21.9 Amps |
| Amperage Requirement | 25 |
| Tonnage | 2 Ton |
| 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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