Mitsubishi SLZ-AF09NL & SUZ-AA09NL 9,000 BTU 21 SEER2 Four-Way Ceiling Cassette System (w/ Standard Grille) - R454B

Mitsubishi SLZ‑AF09NL & SUZ‑AA09NL: 9,000 BTU Ceiling‑Cassette Heat‑Pump System

The Mitsubishi SLZ‑AF09NL 4‑way ceiling cassette paired with the SUZ‑AA09NL outdoor condenser forms a high‑efficiency 9 k BTU single‑zone heat‑pump solution engineered for bedrooms, home offices, studios, or boutique retail spaces. An INVERTER‑driven twin‑rotary compressor, Pulse‑Amplitude‑Modulation control, and environmentally friendly R454B refrigerant deliver tight temperature control and stellar part‑load performance, while Blue Fin anti‑corrosion coating safeguards the outdoor coil for years of reliable service.

Sized for roughly 350 sq ft, the system provides year‑round comfort with a built‑in 33 in. condensate lift pump and smart control through Mitsubishi’s Comfort Cloud app or third‑party thermostats. The included SLP‑18FAU decorative grille finishes the 24 × 24 in. cassette with a clean, low‑profile look.

General Information

System Type: 4‑way ceiling cassette + single‑zone heat‑pump condenser

Models: Indoor – SLZ‑AF09NL (+ SLP‑18FAU grille) | Outdoor – SUZ‑AA09NL

Capacities: 9 k BTU Cooling | 12 k BTU Heating (max 12.8 k BTU)

Room Size: Ideal for ~350 sq ft

Operating Modes: Heating & Cooling

ENERGY STAR®: Yes (SEER2 21, HSPF2 11.8)

Refrigerant / Factory Charge: R454B, 2 lb

Key Features

INVERTER‑Driven Compressor – Modulates output for precise, energy‑saving comfort.
Pulse Amplitude Modulation & Joint‑Lap DC Motor – Boost overall efficiency and durability.
4‑Way Vane Control – Individually adjustable vanes blanket the room with even airflow.
Built‑In Lift Pump – 33 in. condensate lift simplifies ceiling installations.
Quiet Operation – Indoor 25‑31 dB(A); Outdoor 48‑50 dB(A) (quieter than normal conversation).
Blue Fin Anti‑Corrosion Coating – Shields the outdoor coil in coastal or industrial environments.
Advanced Controls – Compatible with Comfort Cloud app, wired/wireless remotes, BACnet®, Modbus®, and thermostat interface kits.
Hot‑Start Technology – Prevents cold‑air blasts at heat‑mode start‑up.
Fresh‑Air Intake Port – Allows outside‑air integration for better indoor air quality.
3D i‑see Sensor® Ready – Optional occupancy detection for additional energy savings.

Specifications (Rated Conditions)

Cooling Capacity: 2,300 – 9,000 BTU | EER2: 13.2 | SEER2: 21
Heating Capacity @ 47 °F: 4,900 – 12,800 BTU | HSPF2: 11.8 | COP (47 °F): 3.8
Electrical: 208/230 V 1‑Ph 60 Hz | MCA 13 A | MOCP 22 A
Airflow (Dry): 230 – 300 CFM (cool & heat)
Sound Pressure: Indoor 25‑31 dB(A) | Outdoor 48‑50 dB(A)
Piping: Liquid ¼ in. | Gas ⅜ in. | Max length 65 ft | Max height 40 ft
Outdoor Dimensions / Weight: 31‑1/2 × 11‑1/4 × 21‑3/4 in. | 81 lb
Drain Connection: ¾ in. O.D.

Included Components

Indoor Unit: SLZ‑AF09NL ceiling cassette
Decorative Grille: SLP‑18FAU (required)
Outdoor Unit: SUZ‑AA09NL heat‑pump condenser

Ideal For

Homeowners or small‑business owners who need a quiet, ENERGY STAR®‑qualified, and highly configurable ceiling‑mounted system to condition a single compact zone—such as bedrooms, studios, or checkout areas—while enjoying advanced app‑based control and robust coastal‑grade durability.