Mitsubishi PLA-AE18NL 18,000 BTU Four-Way Ceiling Cassette Indoor Unit (Unit Only) - R454B

Mitsubishi PLA‑AE18NL – 18,000 BTU R‑454B Ceiling Cassette Indoor Unit

The Mitsubishi PLA‑AE18NL four‑way ceiling cassette delivers efficient 18,000 BTU heating and cooling in a single‑zone mini‑split setup. Designed for commercial and large residential spaces (up to ~750 sq ft), this P‑Series unit uses low‑GWP R‑454B refrigerant and offers silent, year‑round comfort—even in low ambient temps.

General Information

System Type: Ceiling cassette ductless air handler (indoor only)
Model: PLA‑AE18NL
Capacity: 18,000 BTU Cooling / 19,000 BTU Heating
Room Size: Ideal for up to ~750 sq ft
Operating Modes: Heating & Cooling
ENERGY STAR®: Yes
Refrigerant: R‑454B, pre‑charged; connects via standard line sets

Key Features

• 3D i‑see Sensor®: Scans room occupancy and temperature patterns to adjust airflow and save energy

• 72 Airflow Configurations: Selectable individual vane control for customized comfort in varied layouts

• Quiet Operation: Sound levels just 28–32 dB(A) in both heating and cooling

• Built‑in Condensate Lift: Simplifies installation with internal pump capable of 33" lift

• Low‑Profile Design: Compact 33 × 33 × 10″ unit fits neatly into standard ceiling grids 

• Efficient Fan System: DC fan motor delivers up to 600 CFM airflow

• Flexible Controls: Compatible with wired/wireless remotes, app-based and third‑party interfaces

Specifications (Rated Conditions)

• Airflow (Cooling/Heating): 460–600 CFM

• Sound Pressure: 28–32 dB(A) 

• Electrical: 208/230 V • 1‑Phase • 60 Hz 

• Piping Size: Liquid ¼″ • Gas ½″ • Drain 1¼″

• Unit Dimensions/Weight: 33‑1/16″ × 33‑1/16″ × 10‑3/16″ • 46 lb

Included Components

• PLA‑AE18NL ceiling cassette indoor unit

Ideal For

Facility managers, business owners, and homeowners seeking high-efficiency, discreet ceiling-mounted comfort. Perfect for classrooms, offices, conference rooms, lobbies, and other light-commercial or large residential environments.