Mitsubishi SLZ-AF15NL & SUZ-AA15NLHZ 15,000 BTU 17 SEER2 Four-Way Ceiling Cassette Hyper-Heat System (w/ Standard Grille) - R454B

Mitsubishi SLZ‑AF15NL & SUZ‑AA15NLHZ: 15,000 BTU Ceiling‑Cassette Hyper‑Heating System

The Mitsubishi SLZ‑AF15NL 4‑way ceiling cassette, paired with the SUZ‑AA15NLHZ Hyper‑Heating outdoor unit, forms a high‑performance 15 k BTU mini-split system engineered for efficient year-round comfort—even in subfreezing temperatures. With advanced INVERTER compressor technology, Hyper‑Heating cold-climate performance, and R454B refrigerant, this ductless solution delivers exceptional energy savings and consistent heating and cooling for spaces around 650 sq ft.

The system includes the required SLP‑18FAU decorative grille and offers Wi‑Fi-ready control through the Mitsubishi Comfort Cloud app. Its compact, recessed cassette provides four-way airflow and ultra‑quiet operation, while a built‑in 33" lift pump and optional fresh-air intake add flexibility for ceiling installations.

General Information

System Type: 4‑way ceiling cassette + single‑zone Hyper‑Heating heat-pump condenser
Models: Indoor – SLZ‑AF15NL (+ SLP‑18FAU grille) | Outdoor – SUZ‑AA15NLHZ
Capacities: 15 k BTU Cooling | 17 k BTU Heating
Room Size: Ideal for ~650 sq ft
Operating Modes: Hyper‑Heating & Cooling
ENERGY STAR®: Yes (SEER2 17, HSPF2 9.2)
Refrigerant / Factory Charge: R454B, 2 lb 6 oz

Key Features

Hyper‑Heating INVERTER® Technology – Delivers full rated heating down to 5°F and reliable performance to -13°F.
4‑Way Vane Control – Ensures balanced, even airflow for superior comfort.
Ultra‑Quiet Operation – Indoor operation as low as 27 dB(A); outdoor max 54 dB(A).
Wi‑Fi Ready – Connects with Mitsubishi Comfort Cloud app for remote monitoring and control.
33" Built-In Lift Pump – Simplifies ceiling-mounted condensate drainage.
Blue Fin Anti‑Corrosion Coating – Shields outdoor coil from salt, moisture, and pollutants.
Fresh‑Air Intake Option – Promotes better indoor air quality through ventilation.
3D i‑see Sensor® Compatible – For occupancy detection and intelligent temperature targeting.
Hot‑Start Technology – Prevents cold drafts when heating begins.
Discreet Installation – Flush-mounted design ideal for modern, clutter-free interiors.

Specifications (Rated Conditions)

Cooling Capacity: 15,000 BTU | EER2: 12.7 | SEER2: 17
Heating Capacity @47°F: 17,000 BTU | HSPF2: 9.2 | COP (47°F): 3.3
Heating Capacity @5°F: 17,000 BTU
Electrical: 208/230 V 1‑Ph 60 Hz | MCA: 14 A | MOCP: 20 A
Airflow (Dry): 245-405 CFM (cool & heat)
Sound Pressure: Indoor 27–39 dB(A) | Outdoor 54-55 dB(A)
Piping: Liquid ¼ in. | Gas ½ in. | Max length 65 ft | Max height 40 ft
Outdoor Dimensions / Weight: 31‑1/2 × 13 × 21‑5/8 in. | 90 lb
Drain Connection: ¾ in. O.D.

Included Components

Indoor Unit: SLZ‑AF15NL ceiling cassette
Decorative Grille: SLP‑18FAU (required)
Outdoor Unit: SUZ‑AA15NLHZ Hyper‑Heating heat‑pump condenser

Ideal For

Homeowners or small businesses seeking a cold-climate-ready ductless system that combines whisper‑quiet ceiling installation, app-based control, and ENERGY STAR® efficiency for bedrooms, home offices, or retail spaces