Mitsubishi SEZ-AD15NL & SUZ-AA15NL 15,000 BTU 19.1 SEER2 Horizontal Ducted System - R454B

Mitsubishi SEZ‑AD15NL & SUZ‑AA15NL: 15,000 BTU Ducted Concealed Heat‑Pump System

Pairing the slim SEZ‑AD15NL horizontal‑ducted indoor unit with the SUZ‑AA15NL outdoor condenser creates a high‑efficiency 15,000 BTU single‑zone heat‑pump solution ideal for larger bedrooms, open‑concept living areas, or quiet office suites. Mitsubishi’s INVERTER‑driven compressor and eco‑friendly R‑454B refrigerant deliver precise load‑matching comfort and strong part‑load efficiency, while Blue Fin coil coating shields the outdoor unit from corrosion.

At just 7‑7/8 inches tall, the SEZ‑AD15NL tucks easily into ceiling joists, soffits, or shallow closets. A factory‑installed condensate lift pump simplifies drainage in concealed installs, and indoor sound drops to a whisper‑quiet 23 dB(A). The system heats and cools spaces up to roughly 650 sq ft and boasts ENERGY STAR® performance for year‑round savings. Control is effortless with wired or wireless remotes and full smartphone access via the kumo cloud® app.

General Information

System Type: Concealed ducted indoor unit + single‑zone heat‑pump condenser
Models: Indoor – SEZ‑AD15NL | Outdoor – SUZ‑AA15NL
Capacities: 15,000 BTU Cooling | up to 18,000 BTU Heating
Room Size: Ideal for ~650 sq ft
Operating Modes: Heating & Cooling
ENERGY STAR®: Yes
Refrigerant / Factory Charge: R‑454B, ~3 lb

Key Features

• INVERTER‑Driven Compressor for energy‑saving variable capacity

• Ultra‑Slim 7‑7/8 " Cabinet fits tight ceiling spaces

• Quiet Operation as low as 23 dB(A)

• Built‑In 21 " Drain Pump for hassle‑free condensate removal

• Blue Fin Anti‑Corrosion Coating extends outdoor coil life

• Advanced Controls with kumo cloud®, wired/wireless remotes, and thermostat interfaces

Specifications (Rated Conditions)

Cooling Capacity: 15,000 BTU
Heating Capacity: Up to 18,000 BTU
Electrical: 208/230 V · 1‑Ph · 60 Hz
Indoor Sound: 23 – 35 dB(A) (Lo–Hi)
Piping: Liquid ¼ " | Gas ⅜ " | Max length 100 ft | Max height 50 ft
Outdoor Dimensions / Weight: ~33 " W × 13 " D × 34 " H · ~115 lb

Included Components

• Indoor Unit: SEZ‑AD15NL horizontal ducted air handler

• Outdoor Unit: SUZ‑AA15NL heat‑pump condenser

Ideal For

Homeowners, remodelers, and small‑business owners seeking a hidden, whisper‑quiet, energy‑efficient solution to condition single zones such as large bedrooms, basements, studios, or professional offices.