Mitsubishi MSZ-EX18NLW & SUZ-AA18NL 18,000 BTU 17.5 SEER2 Wall Mounted Heat Pump System - R454B

Mitsubishi MSZ‑EX18NLW & SUZ‑AA18NL: 18,000 BTU Wall‑Mounted Heat Pump System

The Mitsubishi MSZ‑EX18NLW indoor air handler paired with the SUZ‑AA18NL outdoor condenser delivers efficient 18,000 BTU cooling and heating in a sleek ductless mini‑split configuration, ideal for rooms up to 750 sq ft. It offers quiet, reliable single‑ or multi‑zone comfort.

Engineered with INVERTER‑driven compressor technology and eco‑friendly R‑454B refrigerant, the MSZ‑EX18NLW ensures year‑round efficiency. The low‑profile indoor unit blends into any décor, while the SUZ‑AA18NL maintains dependable heating in moderate climates. 

Note: This system is not compatible with Mitsubishi’s smart outdoor units.

General Information

System Type: Wall‑mounted ductless air handler + single‑ or multi‑zone heat‑pump condenser
Models: Indoor – MSZ‑EX18NLW | Outdoor – SUZ‑AA18NL
Capacities: 16,400 BTU Cooling | 20,000 BTU Heating (nominal) 
Room Size: Ideal for up to 750 sq ft
Operating Modes: Heating & Cooling
ENERGY STAR®: Yes
Refrigerant / Factory Charge: R‑454B

Key Features

INVERTER Technology: Efficient, variable‑speed compressor for consistent comfort
Dual Application: Compatible with single‑ or multi‑zone installations
Quiet Operation: Indoor sound levels as low as 30 dB(A) 
Compact Design: Low‑profile indoor unit fits most wall spaces
Advanced Filtration: Hybrid catechin + nano‑platinum filter for cleaner air
Remote Control: Handheld IR remote included for easy operation
Smart Compatibility Notice: Not compatible with smart outdoor models

Specifications (Rated Conditions)

Cooling Capacity: 16,400 BTU | SEER2: 17.5 | EER2: 11.7
Heating Capacity @ 47 °F: 20,000 | HSPF2: 10.6 | COP (47 °F): 3.4
Heating Capacity @ 17 °F: 13,100 (approx.)
Electrical: 208/230 V, 1‑Ph, 60 Hz
Airflow (Dry): 208 – 497 CFM
Sound Pressure: Indoor 30 – 49 dB(A) | Outdoor 54– 55 dB(A)
Piping: Liquid ¼ in. | Gas ½ in. | Max Line Length 100 ft | Max Height 50 ft 
Outdoor Dimensions / Weight: 33‑1/16 × 13 × 34‑5/8 in. | 115 lb 
Drain Connection: ⅝ in. O.D.

Included Components

Indoor Unit: MSZ‑EX18NLW wall‑mounted air handler
Outdoor Unit: SUZ‑AA18NL heat‑pump condenser
Remote Controller

Ideal For

Homeowners and contractors seeking a quiet, energy‑efficient mini‑split system for rooms up to 750 sq ft. The MSZ‑EX18NLW & SUZ‑AA18NL system offers flexible single‑ or multi‑zone installation and dependable year‑round comfort—without compatibility with smart outdoor models.