Mitsubishi SEZ-AD12NL & SUZ-AA12NL 12,000 BTU 19 SEER2 Horizontal-Ducted System - R454B

Mitsubishi SEZ‑AD12NL & SUZ‑AA12NL: 12,000 BTU Ducted Concealed Heat‑Pump System

The Mitsubishi SEZ‑AD12NL ducted concealed indoor unit paired with the SUZ‑AA12NL outdoor condenser creates a high-efficiency 12,000 BTU single-zone heat-pump system ideal for master bedrooms, finished basements, or compact workspaces where quiet, hidden climate control is essential. Featuring advanced INVERTER-driven technology and eco-friendly R-454B refrigerant, this system offers excellent part-load efficiency and precise temperature control, while the Blue Fin anti-corrosion coating protects the outdoor coil for long-lasting performance.

With a slim 7-7/8" profile, the SEZ‑AD12NL installs easily in ceiling cavities, soffits, or shallow closets without compromising output. A built-in condensate drain pump allows for flexible installation and reliable moisture removal, making this system ideal for discreet applications.

The SEZ‑AD12NL/SUZ‑AA12NL system quietly heats and cools spaces up to approximately 500 sq ft, with indoor noise levels as low as 23 dB(A). ENERGY STAR® certified, it delivers efficient year-round comfort and smart control compatibility, including wired/wireless remotes and full mobile access through the kumo cloud® app.

General Information

System Type: Ducted concealed indoor unit + single-zone heat-pump condenser
Models: Indoor – SEZ‑AD12NL | Outdoor – SUZ‑AA12NL
Capacities: 12,000 BTU Cooling | Up to 15,000 BTU Heating
Room Size: Ideal for ~500 sq ft
Operating Modes: Heating & Cooling
ENERGY STAR®: Yes
Refrigerant / Factory Charge: R-454B, 2 lb

Key Features

INVERTER-Driven Compressor: Ensures energy-efficient, variable-speed performance
Compact, Low-Profile Design: 7-7/8" height fits tight ceiling spaces
Quiet Operation: Indoor sound levels as low as 23 dB(A)
Built-In Drain Pump: Eases condensate management
Blue Fin Anti-Corrosion Coating: Extends outdoor unit lifespan
Advanced Controls: Supports kumo cloud®, wired and wireless remotes
Smart Control Integration: Enables remote scheduling and system monitoring

Specifications (Rated Conditions)

Cooling Capacity: 12,000 BTU
Heating Capacity: Up to 15,000 BTU
Electrical: 208/230 V 1-Ph 60 Hz
Sound Pressure: Indoor 23 dB(A)
Piping: Liquid 1/4 in. | Gas 3/8 in. | Max length 65 ft | Max height 40 ft
Outdoor Dimensions / Weight: 31-1/2 × 11-1/4 × 21-3/4 in. | 81 lb

Included Components

Indoor Unit: SEZ‑AD12NL ducted concealed unit
Outdoor Unit: SUZ‑AA12NL heat-pump condenser

Ideal For

Homeowners or small-business owners looking for a discreet, quiet, and efficient single-zone ducted system to heat and cool spaces like primary bedrooms, home offices, or studio suites. Delivers long-lasting performance with flexible controls and smart features from Mitsubishi’s trusted lineup.