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Mitsubishi SZ-K15NA

15,000 BTU 15.5 SEER MR SLIM Concealed Duct Ductless Mini Split Air Conditioner Heat Pump 208-230V

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About this Item

  • Yearly Estimated Cooling Cost: $255
  • SEER: 15.5
  • Recommended Room Size: 500 - 800 ft2
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System Size (Capacity) How do I select my size? info_outline
9,000 BTU
300 - 500 ft2
12,000 BTU
400 - 650 ft2
15,000 BTU
500 - 800 ft2
18,000 BTU
600 - 1,000 ft2
Looking for Help or Advice?
Our dedicated team is here to help you through the process of selecting the right system or part.

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Product Highlights

System Includes:

  • Outdoor Condenser Model: SUZ-KA15NA.TH
  • Indoor Concealed Duct Model: SEZ-KD15NA4R1.TH
  • Wireless Remote Control
  • Required, but not included: 1/4" x 1/2" line set

Note: Optional Tethered Wall Mount Remote Controller (PAR-32MAA-J) must be ordered separately

This MR SLIM INVERTER-driven concealed duct split system is ideal for conditioning rooms/zones with limited wall space, because the evaporator stays hidden in the ceiling, floor, or closet. These high efficiency heat pump systems are Energy Star rated, and they have rated capacities ranging from 8,100-17,200 BTU, while operating at 15-17.5 SEER.

Control Options
The SUZ-K/SEZ-K models offer the optional wireless, RFI-RedLINK™ enabled, full-function wall mount controller, allowing homeowners to control their unit from a remote PC, smartphone or tablet (MHK1 sold separately).

INVERTER Technology
The M-Series INVERTER-driven compressor works with the system's sophisticated electronic controls to detect temperature changes in a room or zone, automatically changing speeds to adjust for precise capacity and temperature control.

Quiet Operation
Mr. Slim Indoor Units operate at very low sounds levels (19-34 decibels). According to a study performed by the National Institute for Occupational Safety and Health, Mr. Slim Indoor Units are quieter than a human whisper (30 decibels) at low speed.

Environmentally Friendly
Mitsubishi was clearly taking the environment into consideration when designing the M-Series line by using R410A refrigerant with zero Ozone Depletion Potential (ODP), 83% recyclable components, and washable filters made from natural materials on all models.

Additional Features & Benefits

  • Auto fan speed feature plus three speed settings available (Low, Medium, High)
  • Thin body (7-7/8") built-in condensate lift mechanism with up to 20" lift
  • Auto restart feature works after a power outage
  • Indoor unit is powered by the outdoor condenser
  • Optional filter box with MERV-8 filters

Please Note: Mini Split Systems must be installed by a licensed Contractor with an EPA Refrigerant Certification to qualify for warranty.

Which line set kit do I need?
This system uses (1) 1/4" x 1/2" line set. These are sold separately, and you can choose from our 15 ft, 25 ft, 35 ft, 50 ft, and 75 ft lengths. The length needed depends on the needs of your project and how you will set up the system (distance from outdoor condenser to indoor air handler).

Can I install this myself?
While installation of a ductless split is much easier than a central air system, it's still much more advanced than installing a window unit or portable. Furthermore, the manufacturer warranty is only valid if a licensed professional does the installation. So while it is possible to do the installation yourself, we strongly recommend you hire an HVAC professional in your area.

Is this backed by a warranty?
Yes, it comes fully backed by a manufacturer's warranty (click here for more details), and ComfortUp is an authorized online seller of these systems. Our Customer Care Team will provide assistance should you ever need to file a warranty claim with the manufacturer. Please be aware that only systems that are installed by a licensed HVAC contractor are backed by the warranty. Proof of licensed installation is required. The receipt/invoice from your contractor should be sufficient.

Note: Concealed ducts need to be installed in a conditioned space in order to operate effectively. It’s highly recommended to discuss this application with a licensed contractor that is experienced with the installation of these units.

Number of Zones/Rooms 1 Zone
Inverter Technology Yes
Filter Type Multiple, Reusable
EER (Energy Efficiency Ratio) 12.0
Sound Pressure Rating ID - 30/34/37 dB(A) OD - Cool/Heat - 49/51 dB(A)
HSPF (Heating Seasonal Performance Factor) 10.0
Warranty Offered Yes
Voltage 208-230 VAC
Nominal Capacity (BTU) 15,000
Corrosion Protection No
Refrigerant R-410a
Color White
Rated Cooling Capacity (BTU) 3800-17000
SEER 15.5
Rated Heating Capacity (BTU) 4800-21100
Brand Mitsubishi
Energy Star Rated Yes
Model Family M-Series
Minimum Circuit Amps 12
4-Way Remote Air Flow Control No
Liquid/Gas Line Set Size 1/4" X 1/2"
Phase Single
Cycle/Hertz 60
Efficiency High
Maximum Fuse Size 15
Equipment Type Heat Pump
Mounting Type Concealed Duct
Tonnage 1 1/4
Room Size 500 - 800 ft2
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