Mitsubishi SLZ-AF09NL & SUZ-AA09NLHZ 9,000 BTU 16.6 SEER2 Four-Way Ceiling Cassette Hyper Heating Heat Pump System (w/ Standard Grille) - R454B

Mitsubishi SLZ‑AF09NL & SUZ‑AA09NLHZ: 9,000 BTU Ceiling‑Cassette Cold‑Climate Heat‑Pump System

The Mitsubishi SLZ‑AF09NL 4‑way ceiling cassette paired with the SUZ‑AA09NLHZ Hyper‑Heating outdoor condenser delivers a high‑efficiency 9 k BTU single‑zone system designed for cold climates and compact spaces like bedrooms, home offices, or small retail areas. This cold‑weather configuration features Mitsubishi’s advanced Hyper‑Heating INVERTER® (H2i®) technology, maintaining reliable heat output even in sub‑zero temperatures. The system uses R454B refrigerant, an INVERTER‑driven twin‑rotary compressor, and PAM control for responsive, energy‑saving operation.

Rated for spaces around 350 sq ft, the system includes the required SLP‑18FAU decorative grille, which provides a clean, flush‑mount finish within a 24 × 24 in. ceiling grid. A 33 in. built‑in lift pump, Blue Fin anti‑corrosion protection, and integrated Wi‑Fi control via Mitsubishi’s Comfort Cloud app offer lasting performance, quiet operation, and effortless smart‑home connectivity.

General Information

System Type: 4‑way ceiling cassette + single‑zone cold‑climate heat‑pump condenser
Models: Indoor – SLZ‑AF09NL (+ SLP‑18FAU grille) | Outdoor – SUZ‑AA09NLHZ
Capacities: 9 k BTU Cooling | 12 k BTU Heating (max 13.6 k BTU)
Room Size: Ideal for ~350 sq ft
Operating Modes: Heating & Cooling
ENERGY STAR®: Yes (SEER2 16.6, HSPF2 12.5)
Refrigerant / Factory Charge: R454B, 2 lb

Key Features

Hyper‑Heating INVERTER® (H2i®) Technology – Delivers 100% heating capacity down to 5 °F and reliable performance as low as ‑13 °F.
INVERTER‑Driven Compressor – Adjusts output for precise, energy‑efficient comfort.
4‑Way Vane Control – Distributes airflow evenly for superior room coverage.
Built‑In Condensate Lift Pump – 33 in. lift supports flexible ceiling installations.
Quiet Operation – Indoor 25‑31 dB(A); Outdoor 54-55 dB(A) (quieter than typical indoor conversation).
Wi‑Fi Built‑In – Compatible with Mitsubishi Comfort Cloud app for remote operation and scheduling.
Blue Fin Anti‑Corrosion Coating – Protects coil in harsh coastal or industrial environments.
Hot‑Start Technology – Prevents cold air blasts at heat start‑up.
Fresh‑Air Intake Port – Allows outside‑air integration to improve indoor air quality.
3D i‑see Sensor® Ready – Optional sensor enables occupancy‑based energy savings.

Specifications (Rated Conditions)

Cooling Capacity:  9,000 BTU | EER2: 12.5 | SEER2: 16.6
Heating Capacity @47 °F: 12,000 BTU | HSPF2: 9.3 | COP (47 °F): 3.4
Heating Capacity @17 °F: 7,500 BTU | Heating Capacity @5 °F: 12,000 BTU
Electrical: 208/230 V 1‑Ph 60 Hz | MCA: 14 A | MOCP: 20 A
Airflow (Dry): 230-300 CFM (cool & heat)
Sound Pressure: Indoor 25–31 dB(A) | Outdoor 54-55 dB(A)
Piping: Liquid ¼ in. | Gas ⅜ in. | Max length 65 ft | Max height 40 ft
Outdoor Dimensions / Weight: 33-1/16 x 13 x 24-11/16 in. | 115lb
Drain Connection: ¾ in. O.D.

Included Components

Indoor Unit: SLZ‑AF09NL ceiling cassette
Decorative Grille: SLP‑18FAU (required)
Outdoor Unit: SUZ‑AA09NLHZ Hyper‑Heating condenser

Ideal For

Homeowners or business owners in cold regions who need a compact, ceiling‑mounted ductless system for targeted heating and cooling of smaller spaces—such as bedrooms, studios, or checkout counters—alongside built‑in smart features, cold‑weather reliability, and coastal‑grade durability.