Mitsubishi SLZ-AF12NL & SUZ-AA12NL 12,000 BTU 20.3 SEER2 Four-Way Ceiling Cassette Heat Pump System (w/ Standard Grille) - R454B

Mitsubishi SLZ‑AF12NL & SUZ‑AA12NL: 12,000 BTU Ceiling‑Cassette Heat‑Pump System

The Mitsubishi SLZ‑AF12NL 4‑way ceiling cassette, combined with the SUZ‑AA12NL outdoor condenser, delivers a compact yet powerful 12 k BTU single‑zone system engineered for year-round heating and cooling in residential or light-commercial spaces. With INVERTER-driven technology, R454B refrigerant, and PAM control, the system ensures precise temperature regulation and energy-efficient performance.

This system is ideal for rooms around 500 sq ft and features the required SLP‑18FAU grille, providing a sleek, flush ceiling fit in standard 2'×2' grids. Built-in Wi‑Fi enables remote access via the Mitsubishi Comfort Cloud app, while a 33" lift pump and Blue Fin coil coating enhance flexibility and durability.

General Information

System Type: 4‑way ceiling cassette + single‑zone ductless heat‑pump condenser
Models: Indoor – SLZ‑AF12NL (+ SLP‑18FAU grille) | Outdoor – SUZ‑AA12NL
Capacities: 12 k BTU Cooling | 15 k BTU Heating (max 15.3 k BTU)
Room Size: Ideal for ~500 sq ft
Operating Modes: Heating & Cooling
ENERGY STAR®: Yes (SEER2 20.3, HSPF2 9.7)
Refrigerant / Factory Charge: R454B, 2 lb 6 oz

Key Features

INVERTER‑Driven Compressor – Adjusts output for precise, energy-saving operation.
4‑Way Airflow Vane Control – Provides even air distribution for optimal comfort.
Built‑In Lift Pump – 33" lift height for flexible ceiling drain configurations.
Quiet Operation – Indoor 25–34 dB(A); Outdoor 49–51 dB(A), quieter than a normal conversation.
Wi‑Fi Built‑In – Remote control and scheduling with Mitsubishi Comfort Cloud app.
Blue Fin Anti‑Corrosion Coating – Shields outdoor coil for enhanced longevity.
Hot‑Start Technology – Eliminates cold air at start-up in heat mode.
Fresh-Air Intake Ready – Integrates with ventilation for improved air quality.
3D i‑see Sensor® Compatible – Optional sensor adjusts operation based on occupancy.

Specifications (Rated Conditions)

Cooling Capacity: 12,000 BTU | EER2: 12.5 | SEER2: 20.3
Heating Capacity @47 °F: 15,000 BTU | HSPF2: 9.7 | COP (47 °F): 3.2
Electrical: 208/230 V 1‑Ph 60 Hz | MCA: 14 A | MOCP: 20 A
Airflow (Dry): 230-335 CFM (cool & heat)
Sound Pressure: Indoor 25–34 dB(A) | Outdoor 49-51 dB(A)
Piping: Liquid ¼ in. | Gas ⅜ in. | Max length 65 ft | Max height 40 ft
Outdoor Dimensions / Weight: 31-8/16 x 11-4/16 x 21-11/16 in. | 86 lb
Drain Connection: ¾ in. O.D.

Included Components

Indoor Unit: SLZ‑AF12NL ceiling cassette
Decorative Grille: SLP‑18FAU (required)
Outdoor Unit: SUZ‑AA12NL condenser

Ideal For

Homeowners or business owners seeking a quiet, energy‑efficient ceiling-mounted mini-split for small to mid-sized rooms—such as guest rooms, offices, or small studios—offering seamless app control, flexible installation, and year‑round comfort.