Description
SUZ-AA12NL-SEZ-AD12NL pairs the Mitsubishi Electric SUZ-AA12NL outdoor heat pump with the SEZ-AD12NL low-static horizontal-ducted indoor unit for a compact one-to-one system. It is designed to heat and cool one or two rooms through a short duct run, which is ideal for targeted comfort without wall units in view. SEZ can be concealed in ceilings, attics, beneath floors, or behind soffits so the space stays clean and uncluttered. Only the intake grille and supply vents are visible, which is a strong selling point for design-sensitive rooms. This NL generation uses refrigerant type R-454B, aligning the system with today’s low-GWP A2L equipment direction. The platform is a practical choice for bedrooms, offices, suites, and additions where quiet, steady comfort matters most. If a buyer wants ducted comfort in a tight footprint, this pairing is built to win.
Rated cooling capacity is 12,000 BTU/h, with a listed maximum cooling capacity of 12,000 BTU/h. Minimum cooling capacity is listed at 2,900 BTU/h, supporting better comfort control when outdoor conditions are mild. Moisture removal is listed at 2.5 pints per hour to help reduce that damp, sticky indoor feel. Rated cooling power input is 990 W, which helps buyers compare operating cost across options. Sensible heat factor is listed at 0.77, giving more detail on how the system manages temperature and humidity together. Because the system can vary output, it is designed to maintain setpoint smoothly rather than cycling hard. That smoother behavior is what customers feel, and what converts readers into buyers.
Rated heating capacity at 47 F is 15,000 BTU/h, with a listed maximum heating capacity at 47 F of 15,000 BTU/h. Minimum heating capacity at 47 F is listed at 5,000 BTU/h, supporting steadier comfort on lighter heating days. Heating capacity at 17 F is listed at 9,700 BTU/h for a practical cold-weather reference. Heating capacity at 5 F is listed at 7,800 BTU/h to help set expectations when temperatures drop further. Rated heating power input at 47 F is 1,300 W, offering a straightforward comparison point for electric heating load. COP at 47 F is listed at 3.3, supporting an efficiency-forward heat pump story. For buyers who want confidence in winter performance without overselling, these published heating points are the right level of detail.
Airflow at cooling is listed at 247, 317, 388 CFM across fan settings, which helps tune comfort and noise for the room. External static pressure selections are 0.02, 0.06, 0.14, 0.2 in w.g., supporting low-static duct designs and short runs. Indoor unit sound pressure levels are listed at 23, 28, 33 dB(A) depending on airflow setting. SEZ includes a built-in condensate lift mechanism to manage condensate during normal operation. Optional filter boxes are available for higher-efficiency filtration, including MERV 13 filter options for air-quality focused buyers. This combination is designed to deliver ducted comfort quietly, with the equipment staying out of sight and out of mind. That is exactly the kind of product story that keeps customers engaged on a product page.
Efficiency ratings are listed at 19.0 SEER2, 9.6 HSPF2, and 12.1 EER2 for easy comparison. SEZ systems in this family include ENERGY STAR ESCC certified combinations, depending on the exact match. The low-static ducted format makes it easier to condition more than one room while keeping the visual impact minimal. For cooling, the published operating range lists outdoor temperatures from 14 F up to 115 F for this platform family. Outdoor electrical is listed as 208/230V single-phase 60 Hz, with a recommended fuse or breaker size of 15 A. When buyers shop online, the combination of hidden installation style, quiet sound numbers, and verified performance keeps the decision simple. If the goal is compact ducted comfort with strong efficiency and a clean aesthetic, this SEZ pairing is a smart buy.
Key Features
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Matched compact ducted heat pump system: SUZ-AA12NL outdoor unit paired one-to-one with SEZ-AD12NL low-static horizontal-ducted indoor unit.
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Refrigerant type: R-454B (A2L low-GWP platform).
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Cooling performance: 12,000 BTU/h rated cooling, 2,900 BTU/h minimum cooling, 12,000 BTU/h maximum cooling, with 2.5 pints per hour moisture removal.
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Heating performance: 15,000 BTU/h rated at 47 F, 9,700 BTU/h at 17 F, 7,800 BTU/h at 5 F, with COP 3.3 at 47 F.
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Duct tuning: external static pressure selections of 0.02, 0.06, 0.14, 0.2 in w.g. with airflow listed at 247, 317, 388 CFM (cooling dry).
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Quiet operation context: indoor sound pressure levels listed at 23, 28, 33 dB(A) depending on airflow setting.
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Efficiency and electrical: 19.0 SEER2, 9.6 HSPF2, 12.1 EER2, 208/230V 1-phase 60 Hz, recommended 15 A fuse or breaker.
Replaces Discontinued Models
- SUZ-AA12NL replaces: MUF12EN, MUF12EN2, SUZ-KA12NA, SUZ-KA12NA2, SUZ-KA12NAR1
- SEZ-AD12NL replaces: SEZ-KD12NA, SEZ-KD12NA4, SEZ-KD12NA4R1
Replacement matches are based on unit type, capacity and features. Verify line set, electrical supply and controls before ordering. See the discontinued Mitsubishi model cross-reference for details and original manuals.
White Paper
- Mitsubishi SEZ-AD12NL + SUZ-AA12NL System Spec Sheet
- Mitsubishi SEZ-AD12NL Spec Sheet
- Mitsubishi SEZ-AD Series Installation Manual
- Mitsubishi SEZ-AD Series Operation Manual (Part 1 of 2)
- Mitsubishi SEZ-AD Series Operation Manual (Part 2 of 2)
- Mitsubishi SEZ-AD Series Service Manual
- Mitsubishi SUZ-AA Series Installation Manual
- Mitsubishi SUZ-AA Series Operation Manual
- Mitsubishi SUZ-AA Series Service Manual
