Daikin 24,000 BTU MXS 18 SEER2 Dual Zone Wall Mounted Mini Split Heat Pump System - R410A | 230V - 7+12 Review 2026

// Bottom Line

This Daikin dual-zone system is ideal for homeowners retrofitting two rooms or small commercial spaces where ductless installation makes sense. The 18 SEER2 rating and 11.7 HSPF deliver genuine energy savings, particularly in mild to moderate climates.

Review

The Daikin 24,000 BTU MXS 18 SEER2 dual-zone mini split addresses a specific market need: flexible climate control for residential and light commercial spaces without extensive ductwork. Rated at 18 SEER2 and featuring 208/230V single-phase power, this wall-mounted system delivers both cooling and heating across two independent zones. Its ENERGY STAR certification and swing compressor design position it as a credible option for contractors seeking reliability without premium pricing.

Performance metrics tell a solid story. The 12,000 BTU cooling capacity per zone and 11.7 HSPF heating efficiency make this suitable for rooms up to roughly 400-450 square feet each. Real-world noise ranges from 23 dBA on low speed to 45 dBA at full load, keeping neighbor complaints minimal. The 12.7 EER rating confirms efficient operation at full cooling load, though the 5°F heating floor means supplemental heat becomes necessary in deep winter for northern installations.

Pros & Cons

Pros

18 SEER2 rating qualifies for ENERGY STAR certification, reducing utility costs in cooling-dominant climates
Exceptional heating efficiency at 11.7 HSPF, viable down to 5°F outdoor temperature
Quiet operation across all loads: 23-45 dBA keeps running noise from being disruptive
Extended 12-year compressor warranty with online registration provides long-term protection
Swing compressor design offers smooth, reliable performance with lower vibration

Cons

Precharged for only 131 feet limits flexibility if zones are far apart or require long linesets
208/230V single-phase requirement may need electrical upgrades in older homes
Heating capacity drops significantly below 5°F, potentially requiring supplemental heat in harsh climates

Who Should Buy

Best For

Contractors installing efficient climate control in new additions, finished basements, or home offices where ductwork is impractical. Homeowners in moderate climates (zones 5-8) seeking to replace window units or add zoned heating without major construction.

Consider Alternatives If

Anyone in extreme cold climates needing primary heat below 5°F, or projects requiring linesets longer than 131 feet without additional refrigerant charging.

Daikin 24,000 BTU MXS 18 SEER2 Dual Zone Wall Moun

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Installation

Installation requires 208/230V single-phase power with a 25-amp breaker minimum. The system arrives precharged for 131 feet of lineset, a practical limitation for most residential retrofits. Suction line is 3/8 inch, liquid line 1/4 inch, with a standard 5/8 inch drain requirement. Most experienced HVAC contractors complete wall-mount installation in 6-8 hours once electrical is confirmed compliant.

Warranty & Reliability

Daikin provides a comprehensive 12-year compressor warranty when registered online, longer than industry standard. Parts coverage typically runs 5 years. This extended protection reflects manufacturer confidence in the swing compressor design and justifies the system's position in the mid-tier market.

Specifications

SKU	FTXS12WVJU9
Brand/Manufacturer	Daikin
Cooling BTU	12000
Heating BTU	12000
Refrigerant	R410A
Electrical	208/230v 1 Phase 60 Hz
BTU/Tonnage	12,000 BTU/1 Ton
Mini Split Type	Wall Mounted
Zone Compatibility	Multi Zone
Warranty	12 Years with Online Registration
Decibel Level (dBA)	23-45
Weight (in lbs)	22.000000
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 AdobeÂ® AcrobatÂ® 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	155-438 CFM

Frequently Asked Questions

Can I extend the lineset beyond the precharged 131 feet? +

Yes, but you'll need to add additional R410A refrigerant charge beyond factory specs. Expect 0.6 ounces per foot of added lineset. Most contractors charge 1-2 hours labor plus refrigerant cost, typically $150-300 total depending on local rates.

What electrical work is required for installation? +

A dedicated 208/230V single-phase 60 Hz circuit with 21.9-25 amp breaker is mandatory. Older homes with 100-amp service may need panel evaluation. Many installations require an electrician ($500-1200) if existing circuits are unavailable.

How much will this reduce my heating bills compared to resistance heat? +

At 11.7 HSPF, expect 30-40% lower operating costs than electric baseboards in mild climates. However, below 5°F the compressor efficiency drops, and supplemental heat may activate automatically, reducing savings in harsh winters.

Is this system better than a window unit for two rooms? +

Absolutely. Window units average 10-12 SEER2 and consume far more electricity. This Daikin's 18 SEER2 saves roughly 40% annually. Plus it provides heating, operates quietly (23 dBA minimum), and doesn't block windows or require seasonal storage.

What does the 12-year warranty actually cover? +

Compressor parts and labor for 12 years with online registration. Other components typically covered 5 years. Excludes wear items, installation errors, and refrigerant loss from leaks beyond factory defects.

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