Mitsubishi PLA-AE18NL & PUY-AK18NL 18,000 BTU 24.7 SEER2 Ceiling Cassette Cooling Only System - R454B

Mitsubishi PLA‑AE18NL & PUY‑AK18NL – 18,000 BTU R‑454B Ceiling Cassette Mini‑Split System

The Mitsubishi PLA‑AE18NL and PUY‑AK18NL ductless mini-split system provides reliable, high-efficiency cooling in a discreet, ceiling-mounted package. Ideal for light commercial or large residential spaces (up to ~750 sq ft), this single-zone system uses next-gen R‑454B refrigerant and offers year-round comfort with advanced airflow control—even in extreme low ambient conditions.

General Information

System Type: Ceiling cassette mini-split system (indoor & outdoor)
Indoor Model: PLA‑AE18NL
Outdoor Model: PUY‑AK18NL
Capacity: 18,000 BTU Cooling Only
Room Size: Ideal for up to ~750 sq ft
Operating Modes: Cooling
ENERGY STAR®: Yes
Refrigerant: R‑454B, pre‑charged; supports up to 165 ft line set

Key Features

3D i‑see Sensor®: Creates thermal room profiles using infrared scanning to optimize comfort and efficiency based on occupancy and heat signatures

Low Ambient Cooling: Delivers 100% capacity down to -40°F with wind baffles for uninterrupted performance in extreme climates

Blue Fin Coating & Seacoast Protection: Anti-corrosion outdoor coil treatment plus acrylic-enameled panels for coastal and industrial durability

Quiet Operation: Sound levels as low as 28 dB(A) indoors and 44 dB(A) outdoors

Built-in Condensate Lift: Internal pump handles up to 33″ of lift for flexible drainage

Flexible Airflow: 72 configuration options with individual vane control and up/down swing mode

Multiple Control Options: Compatible with wired, wireless, app-based, and third-party thermostat interfaces

Compact Cassette Design: Fits standard 33″ x 33″ ceiling grids; only 10″ tall for space-saving installs

INVERTER Technology: Variable-speed compressor delivers precise capacity and superior energy savings

Specifications (Rated Conditions)

Cooling Capacity (Max/Min): 18,500 / 5,000 BTU
SEER2 / EER2: 24.7 / 13.7
Airflow (Cooling): 460–600 CFM
Sound Pressure: Indoor: 28–32 dB(A) • Outdoor: 44 dB(A)
Electrical: 208/230 V • 1‑Phase • 60 Hz
Piping Size: Liquid ¼″ • Gas ½″ • Max Length: 165 ft • Max Height Diff: 100 ft
Indoor Unit Dimensions/Weight: 33‑1/16″ × 33‑1/16″ × 10‑3/16″ • 46 lb
Outdoor Unit Dimensions/Weight: 34‑19/64″ × 11‑13/16″ × 24‑13/16″ • 99 lb

Included Components

• PLA‑AE18NL ceiling cassette indoor unit

• PUY‑AK18NL outdoor condenser

• PLP‑41EAEU 3D i‑see Sensor® grille (required)

Ideal For

Contractors, facility managers, and homeowners seeking energy-efficient, ceiling-mounted comfort in hot climates or year-round cooling applications. Excellent for classrooms, offices, retail spaces, and other commercial or large residential zones.