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18,000 BTU 20.7 SEER Ceiling Cassette Mitsubishi Mini-Split Single Zone Heat Pump - SZ-KF18NA







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AHRI Number:202392023

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The Mitsubishi SLZ-KF18NA / SUZ-KA18NA3 single-zone mini-split system is designed to be a good fit for rooms that a wall mounted air handler is not an option. With its 18,000 BTU output and its intelligent temperature adjustment technology, the SLZ-KF18NA / SUZ-KA18NA3 lives up to the name of Mitsubishi, one of the top mini-split brands on the market today.


  • Ideal for up to a medium-sized room (depending on climate)
  • 18,000 BTU, 20.7 SEER single-zone mini-split
  • Ceiling recessed to free up wall space in your room
  • Cassette grille included in the cost of this unit
  • Energy Star certified
18,000 BTU, 20.7 SEER

With an output of 18,000 BTU, the SLZ-KF18NA / SUZ-KA18NA3 system is designed to be able to cover up to a medium-sized room in ideal climates. At 20.7 SEER, Mitsubishi designed the unit to provide efficient heating and cooling to your home at a moment’s notice. Please note that the image shows an I-SEE sensor in the cassette grille, available at an additional cost. Without this upgrade, the grille will not include the enhanced functionality of more precisely redirecting the airflow of the unit.


Mitsubishi provides a 5 year parts and 7 year compressor warranty from the factory. When the unit is installed following your state and local codes and is registered online through the manufacturer, the warranty is upgraded to a 10 year parts and compressor warranty.

Enhanced Comfort

With its Inverter technology and constant temperature reading system, the SLZ-KF18NA / SUZ-KA18NA3 is designed to automatically ramp up and down depending on the room’s temperature requirements on a constant basis, keeping you as comfortable as possible in your home.

Intelligent Control

The Mitsubishi SLZ-KF18NA / SUZ-KA18NA3 is designed with intelligent controls that make small adjustments to keep the room’s temperature stable and bringing more comfort to your home. With an optional WiFi accessory, such as the Mitsubishi Kumo Cloud Adapter found here, this unit can be controlled from anywhere that you have Internet access—from across town at work to across the world on vacation—bringing ease of control to Mitsubishi’s superior comfort.

Durability and Reliability

Mitsubishi designed the SLZ-KF18NA / SUZ-KA18NA3 system setup to be durable to withstand standard weathering and lower general wear-and-tear. Mitsubishi also designed the unit to function at a low, -4°F temperature to give you peace of mind with the unit’s reliable warming during the colder months of the year.

Product Specifications

More Information
18,000 BTU 20.7 SEER Ceiling Cassette Mitsubishi Mini-Split Single Zone Heat Pump - SZ-KF18NA
Refrigerant Charge Pre-Charged For: 33'
Weight (in lbs) 158.000000
AHRI Certificate Number 202392023
Brand/Manufacturer Mitsubishi
Controller Not Included
Additional Information Heat Pump
Additional Information Maximum Line Set Length: 100'
Additional Information Drain: 1-1/4"
HSPF 11.6
Cooling BTU 17,700 BTU
Heating BTU 19,700 BTU
Maximum CFM 270-475 CFM
Decibel Level (dBA) Indoor Unit: 32-43 | Outdoor Unit: 54-55
Energy Star Yes
Refrigerant R410A
Capacity Dehumidification Rate: 0.59 gal/hr
SEER1 (Efficiency) 18-20
EER 12.5
Condenser Stages Variable Speed
Compressor Type Rotary
Liquid Line 1/4"
Suction Line 1/2"
Electrical 208/230V 1 Phase 60 Hz
Max Breaker Size 24
Min. Breaker Size 14
Amperage Requirement 25
BTU/Tonnage 18,000 BTU/1.5 Ton
Mini-Split Type Ceiling Cassette
Min/Max Outdoor Temp for Heating -4°-75°
Min/Max Outdoor Temp for Cooling 14°-115°
Zone Compatibility Single Zone
Operating Mode Cooling, Heating
Height Indoor Unit: 9-21/32" | Grille: 13/16" | Outdoor Unit: 34-5/8"
Width Indoor Unit: 22-7/16" | Grille: 25-5/8" | Outdoor Unit: 33-1/16"
Depth Indoor Unit: 22-7/16" | Grille: 25-5/8" | Outdoor Unit: 13"
Additional Info Indoor Unit Weight: 31 lbs | Outdoor Unit Weight: 127 lbs
Warranty 10 Years with Online Registration
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety Information PROPOSITION 65 WARNING


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