Mitsubishi MSZ-EX12NLB & SUZ-AA12NLHZ 12,000 BTU 17.6 SEER2 Wall Mounted Hyper Heat Pump System - R454B

Mitsubishi MSZ‑EX12NLB & SUZ‑AA12NLHZ: 12,000 BTU Wall‑Mounted Hyper‑Heat Pump System

The Mitsubishi MSZ‑EX12NLB indoor unit paired with the SUZ‑AA12NLHZ outdoor condenser delivers efficient 12,000 BTU cooling and powerful 15,000 BTU Hyper‑Heating output. Designed for single‑zone applications—but with an EX‑series head that can also be used in future multi‑zone builds—this inverter‑driven mini‑split system offers dependable, whisper‑quiet comfort for rooms up to 500 sq ft, even in subzero outdoor temperatures down to ‑13 °F. It operates with low‑GWP R‑454B refrigerant and features a factory‑installed base‑pan heater for reliable winter performance.
Note: This package is not compatible with Mitsubishi “smart” outdoor platforms.

General Information

System Type: Wall‑mounted ductless air handler + single‑zone Hyper‑Heat pump condenser
Models: Indoor – MSZ‑EX12NLB | Outdoor – SUZ‑AA12NLHZ
Capacities: 12,000 BTU Cooling | 15,000 BTU Heating
Room Size: Ideal for up to 500 sq ft
Operating Modes: Heating & Cooling
ENERGY STAR®: Yes
Refrigerant / Factory Charge: R‑454B, pre‑charged

Key Features

INVERTER Technology: Variable‑speed compressor for energy‑efficient, responsive performance

Hyper‑Heating Performance: Maintains 100 % heating capacity at 5 °F; delivers consistent heat down to ‑13 °F

Single‑ or Multi‑Zone Flexibility: EX indoor unit supports both single‑zone installs and future multi‑zone expansion

Base‑Pan Heater: Factory‑installed to reduce ice buildup during frigid conditions

Dual Barrier Coating & Advanced Filtration: Helps protect coil and improves indoor air quality

Quiet Operation: Indoor sound levels as low as 21 dB(A) for discreet comfort

Smart Control Ready: Compatible with wireless/wired remotes and Mitsubishi Comfort app

Smart‑Outdoor Compatibility Notice: Not compatible with “smart” outdoor units.

Specifications (Rated Conditions)

Cooling Capacity: 12,000 BTU | EER2: 14.1| SEER2: 17.6
Heating Capacity @ 47 °F: 15,000 BTU | HSPF2: 10 | COP (47 °F): 3.8
Heating Capacity @ 5 °F: 15,000 BTU (100 %)
Electrical: 208/230 V | 1‑Ph | 60 Hz | MCA: 13 A | MOCP: 15 A
Airflow (Dry): 143 – 479 CFM
Sound Pressure: Indoor 21 – 46 dB(A) | Outdoor 54 – 55 dB(A)
Piping: Liquid ¼ in. | Gas ⅜ in. | Max line length 100 ft | Max height 50 ft
Outdoor Dimensions / Weight: 33‑1/16 × 13 × 34‑5/8 in. | 115 lb
Drain Connection: ⅝ in. O.D.

Included Components

• Indoor Unit: MSZ‑EX12NLB wall‑mounted air handler

• Outdoor Unit: SUZ‑AA12NLHZ Hyper‑Heat condenser

• Hand‑held IR Remote Controller

Ideal For

Homeowners and contractors seeking a cold‑climate mini‑split for medium‑sized rooms. This system delivers year‑round comfort with Hyper‑Heating capabilities today, while leaving the door open for future multi‑zone integration—without the complexity of Mitsubishi’s smart outdoor platforms.