Mitsubishi MSZ-EX12NLB & SUZ-AA12NL 12,000 BTU 21.7 SEER2 Wall Mounted Heat Pump System - R454B

Mitsubishi MSZ-EX12NLB & SUZ-AA12NL: 12,000 BTU Wall-Mounted Heat Pump System

The Mitsubishi MSZ-EX12NLB indoor air handler paired with the SUZ-AA12NL outdoor condenser delivers efficient 12,000 BTU cooling and heating in a sleek ductless mini-split configuration. Perfect for single-zone or multi-zone applications, this system is ideal for conditioning rooms up to 500 sq ft with quiet, reliable performance.

Engineered with INVERTER-driven compressor technology and eco-friendly R-32 refrigerant, the MSZ-EX12NLB ensures year-round comfort with impressive energy efficiency. The low-profile indoor unit blends seamlessly into any space, while the SUZ-AA12NL provides dependable heating performance in moderate climates.

Note: This system is not compatible with Mitsubishi’s smart outdoor units such as the SUZ-M, PUZ, or MXZ series.

General Information
System Type: Wall-mounted ductless air handler + single- or multi-zone heat pump condenser
Models: Indoor – MSZ-EX12NLB | Outdoor – SUZ-AA12NL
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-32, 1.65 lb

Key Features

• INVERTER Technology: Efficient, variable-speed compressor for consistent comfort

• Dual Application: Compatible for single-zone or multi-zone installations

• Quiet Operation: Indoor sound levels as low as 21 dB(A)

• Compact Design: Low-profile indoor unit fits most wall spaces

• Advanced Filtration: Washable filter for cleaner indoor air

• Remote Control: Included handheld remote for easy operation

• Smart Compatibility Notice: Not compatible with smart outdoor models

Specifications (Rated Conditions)
Cooling Capacity: 12,000 BTU | SEER2: 21.7 | EER2: 12.2
Heating Capacity @ 47°F: 15,000 BTU | HSPF2: 10 | COP (47°F): 3.6
Heating Capacity @ 17°F: 9,600 BTU
Electrical: 208/230 V, 1-Ph, 60 Hz | MCA: 8 A | MOCP: 15 A
Airflow (Dry): 143–479 CFM
Sound Pressure: Indoor 21–46 dB(A) | Outdoor 49–51 dB(A)
Piping: Liquid 1/4 in. | Gas 3/8 in. | Max Line Length: 65 ft | Max Height: 40 ft
Outdoor Dimensions / Weight: 31-1/2 x 11-1/4 x 21-5/8 in. | 83 lb
Drain Connection: 5/8 in. O.D.

Included Components

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

• Outdoor Unit: SUZ-AA12NL heat pump condenser

• Remote Controller

Ideal For
Homeowners and contractors seeking a quiet, energy-efficient mini-split system for rooms up to 500 sq ft. The MSZ-EX12NLB & SUZ-AA12NL system offers flexible installation as a single- or multi-zone solution and dependable year-round comfort—without compatibility with smart outdoor models.