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Preferred™ Underceiling Indoor Unit

Versatile, Affordable Cooling from Above or Below

Mounted above a ceiling or below a floor, this versatile Underceiling unit delivers cooling with three fan speeds and fixed or oscillating airflow for a room addition or repurposed interior space. It's the perfect complement for our Preferred SeriesTM ductless air conditioner as a part of our single-zone MK*F Ductless System.
Product Line :
Ductless systems – Preferred Series Light Commercial
SEER Efficiency :
Dependent upon outdoor unit pairing
  • Available in 208/230V
  • Modes: Cool, Heat, Dry, Fan, Auto
  • Sizes ranging from 18 to 54
  • Convertible: Underceiling - Floor Console
  • Three fan speeds
  • Fresh air connection
  • Timer
  • Auto-restart function after power failure
  • Louver control (fixed or swing)
  • Quiet indoor sound operation,  as low as 42 decibels1
  • Sleep Mode
  • Follow Me (senses temperature at handheld remote) 
  • Wireless Remote Controller standard
  • Optional Wired Remote Controller ° F and ° C (Timer Function) 
  • 10-year parts limited and 10-year compressor limited warranties to the original purchasing owner upon timely registration2
  • Compatible unit: 124ANS Air Conditioner
  • Optional Features:
    • Condensate Pump
1 Quietest size within each model group during low fan-speed operation.
2 If properly registered within ninety (90) days after original installation, parts are warranted to the original purchaser for a period of 10 years. Otherwise, parts warranty is 5 years. For other applications a 1-year parts and 5-year compressor limited warranties apply. See warranty certificate for details.


Quiet Levels As low as 42 dB(A)1


Restart Automatic after power outage
Notifications Advanced system diagnostics


Control Wireless Remote Controller standard, Optional Wired Remote Controller ° F or ° C (Timer Function) 
Protections Voltage, current, high pressure, loss of charge
Capacity 1.5 - 4.5 tons 


Design White flush mount unit


Full Model Number 40MKCBXXF--3


Full Model Number (Single Zone System) 124AXS0XX000
Bryant reserves the right to discontinue or change any specification or design without prior notice or obligation.

1 Quietest size within each model group during low fan-speed operation.