Mitsubishi MSY-GX24NL & MUY-GX24NL 24,000 BTU 21.5 SEER2 Wall Mounted Cooling Only System - R454B

Mitsubishi MSY-GX24NL & MUY-GX24NL: 24,000 BTU Wall-Mounted Cooling-Only System

The MSY-GX24NL indoor unit paired with the MUY-GX24NL outdoor condenser delivers 24,000 BTU of high-efficiency cooling (27,000 BTU max) in a single-zone ductless mini-split. Designed for large rooms up to 1,000 sq ft, it combines INVERTER precision, ENERGY STAR® performance, and whisper-quiet operation in a slim wall-mounted design. Dual Barrier and Blue Fin coatings protect coils from dust, oil, and corrosion. Built-in Wi-Fi (Comfort app ready) and a back-lit remote offer convenient control.

General Information
System Type: Wall-mounted ductless air handler + single-zone cooling-only condenser
Models: Indoor – MSY-GX24NL | Outdoor – MUY-GX24NL
Capacities: 22,400 BTU Cooling (27,000 BTU Max)
Room Size: Ideal for 1,000 sq ft
Operating Modes: Cooling
ENERGY STAR®: Yes
Refrigerant / Factory Charge: R-454B, 3 lb 12 oz

Key Features

• INVERTER Technology: Variable-speed compressor for precise, energy-saving output

• Low-Ambient Cooling: Maintains cooling to 14 °F; restarts after lock-out at -1 °F

• Quiet Operation: Indoor sound as low as 30 dB(A); outdoor approx. 55 dB(A)

• Dual Barrier & Blue Fin Coatings: Resist dust, oil, and corrosion for longer life

• Washable Nano-Platinum Filter: Long-life filtration with easy cleaning

• Built-In Wi-Fi: Comfort app, wired, or wireless controller compatibility

Specifications (Rated Conditions)
Cooling Capacity: 22,400 BTU | EER2: 13.0 | SEER2: 21.5
Electrical: 208/230 V, 1-Ph, 60 Hz | MCA 23 A | MOCP 40 A
Airflow (Dry): 324–765 CFM (five fan speeds)
Sound Pressure: Indoor 30–53 dB(A) | Outdoor 55 dB(A)
Piping: Liquid ¼ in. | Gas 5/8 in. | Max line length 100 ft | Max height 50 ft
Outdoor Dimensions / Weight: 33-1/16 × 13 × 34-5/8 in. | 116 lb
Drain Connection: 5/8 in. O.D.

Included Components

• Indoor Unit: MSY-GX24NL wall-mounted air handler

• Outdoor Unit: MUY-GX24NL cooling-only condenser

• Back-Lit Hand-Held Remote Controller

Ideal For
Homeowners or contractors needing a quiet, energy-efficient cooling solution for large bedrooms, living rooms, or open-plan areas. The MSY-GX24NL & MUY-GX24NL deliver dependable performance, smart control, and low maintenance in a sleek, space-saving package.