Mitsubishi Electric 15,000 BTU 20.6 SEER2 4 Way Ceiling Cassette Heat Pump Mini Split System R454B Refrigerant | SZ-SLZ15

Mitsubishi Electric

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Mitsubishi Electric SUZ-AA15NL outdoor unit with SLZ-AF15NL ceiling cassette
Condition:
New
Width:
31.50 (in)
Height:
21.69 (in)
Depth:
11.25 (in)

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Overview

Mitsubishi Electric 15,000 BTU 20.6 SEER2 4 Way Ceiling Cassette Heat Pump Mini Split System R454B Refrigerant | SZ-SLZ15

Mitsubishi Electric SUZ-AA15NL outdoor unit with SLZ-AF15NL ceiling cassette
Product details

Description

SUZ-AA15NL-SLZ-AF15NL is a Mitsubishi Electric single-zone heat pump system built around a four-way ceiling-recessed cassette. The SLZ-AF cassette delivers comfort from above while keeping the space clean and uncluttered. The SUZ-AA outdoor unit is matched one-to-one for a straightforward performance story. This NL generation uses R-454B refrigerant, aligning with the A2L low-GWP equipment direction. Four-way air delivery is designed to reduce hot and cold zones by spreading airflow across the space. Customers pick this style when they want a premium look without giving up efficiency. It’s a strong option for main living spaces, suites, and offices where appearance matters.

Rated cooling capacity is 15,000 BTU/h, with a listed maximum of 15,000 BTU/h. Minimum cooling capacity is listed at 3,600 BTU/h to support steadier control when loads drop. Moisture removal is listed at 3.8 pints per hour for stronger humidity comfort support. Rated cooling power input is 1,240 W, providing a clear number for operating-cost comparisons. Sensible heat factor is listed at 0.72, showing more focus on moisture management at this size. Variable-capacity performance helps reduce temperature swing compared to legacy single-stage systems. That smoother comfort is what customers notice day to day.

Rated heating capacity at 47°F is 18,000 BTU/h, with a listed maximum of 19,600 BTU/h. Minimum heating capacity at 47°F is listed at 4,600 BTU/h for better shoulder-season comfort control. Heating capacity at 17°F is listed at 11,300 BTU/h for a real cold-weather reference. Heating at 5°F lists a maximum capacity of 9,600 BTU/h to support continued output in lower temperatures. COP at 47°F is listed at 3.3, supporting an efficiency-forward heating story. HSPF2 is listed at 10.1, helping buyers compare seasonal heating value. If the customer wants electric heat that stays comfortable without constant cycling, this pairing fits.

Airflow rate at cooling, dry is listed at 245, 315, or 405 CFM depending on fan speed. Four discharge vanes support flexible airflow direction to match different room layouts. Indoor sound pressure levels are listed at 27, 34, or 39 dB(A) based on fan speed selection. Outdoor sound pressure is listed at 49 dB(A) in cooling and 51 dB(A) in heating. SEER2 is listed at 20.6 and EER2 is listed at 12.0 for clear efficiency comparison. This system is built to feel balanced, not drafty, while keeping noise controlled. That’s the premium ceiling cassette experience buyers are looking for.

Electrical is listed at 208/230V single-phase 60 Hz, which is standard for many residential applications. Recommended fuse or breaker size is listed at 20 A for planning and scope. The ceiling cassette format is a strong match for rooms where wall units are not wanted. It’s also a clean solution for remodels where you want the comfort upgrade to blend in visually. The combination of verified output and strong published efficiency makes the value easy to communicate online. When the spec story reads clean, buyers feel safer moving forward. If you want a 15k ceiling cassette pairing with strong comfort coverage, this is a smart pick.

Key Features

  • Four-way ceiling cassette style: Ceiling-recessed indoor unit with four-way comfort delivery.

  • R-454B A2L low-GWP platform: NL generation refrigerant type listed as R-454B.

  • Cooling performance: 15,000 BTU/h rated cooling, 3,600 BTU/h minimum, 3.8 pints/h moisture removal.

  • Heating performance: 18,000 BTU/h rated at 47°F, 11,300 BTU/h at 17°F, 9,600 BTU/h max at 5°F, COP 3.3 at 47°F.

  • Efficiency ratings: 20.6 SEER2, 10.1 HSPF2, 12.0 EER2.

  • Airflow and sound context: 245/315/405 CFM (cooling, dry) and 27/34/39 dB(A) indoor sound levels by fan speed.

  • Purchase note: Grille is sold separately.

Replaces Discontinued Models

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

Comfort for the people who live there

The right equipment keeps the rooms you live in steady and quiet, whether it's dinner in the kitchen or a weekend project in the garage.

Specifications

Extra Information

Find your comfort-ready size with confidence

Get a fast, learning-friendly estimate for tons and BTUs, then review it with a Pro to dial in the perfect fit for your home.

Brand:
Mitsubishi Electric
Width:
31.50 (in)
Height:
21.69 (in)
Depth:
11.25 (in)
Weight:
112.00 LBS
Prop 65 Warning:
Yes
Safety Information:
⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Cooling Capacity (BTU):
15,000
Capacity (Tons):
1.5
Zones:
1
Mount Type:
Ceiling Recessed
System Type:
Heat Pump
SEER2:
20+ SEER2
EER2:
12 EER2
HSPF2:
10+ HSPF2
Cold Climate:
No
Minimum Heating Temp (°F):
-4
Refrigerant Type:
R-454B
Electrical Phase:
1-Phase
Wi-Fi Control:
Optional Kit
Energy Star Listed:
Yes
Sound Level Indoor (dB):
27
Sound Level Outdoor (dB):
49
Line Set Size:
1/4 in x 1/2 in
Voltage / Phase:
208/230V 1-Phase
Outdoor Unit SUZ-AA15NL - Nominal Capacity (Tons):
1.25
Outdoor Unit SUZ-AA15NL - Cooling Capacity (BTU/h):
15,000
Outdoor Unit SUZ-AA15NL - Heating Capacity (BTU/h):
18,000
Outdoor Unit SUZ-AA15NL - Maximum Indoor Units (Zones):
1
Outdoor Unit SUZ-AA15NL - Refrigerant:
R-454B
Outdoor Unit SUZ-AA15NL - Voltage/Phase/Hz:
208-230 V / 1 Ph / 60 Hz
Outdoor Unit SUZ-AA15NL - Minimum Circuit Ampacity (MCA):
17 A
Outdoor Unit SUZ-AA15NL - Maximum Overcurrent Protection (MOP):
29 A
Outdoor Unit SUZ-AA15NL - Compressor Type:
Twin Rotary
Outdoor Unit SUZ-AA15NL - Minimum Heating Temp (F):
-5 F
Outdoor Unit SUZ-AA15NL - Sound Level (dB):
49
Outdoor Unit SUZ-AA15NL - Liquid Line Size:
1/4 in
Outdoor Unit SUZ-AA15NL - Suction Line Size:
1/2 in
Outdoor Unit SUZ-AA15NL - Unit Dimensions (W x D x H):
31.5 in x 11.25 in x 21.63 in
Outdoor Unit SUZ-AA15NL - Unit Weight:
81 lb
Outdoor Unit SUZ-AA15NL - Shipping Weight:
88.18 lb
Indoor Unit SLZ-AF15NL - Type:
Ceiling Cassette
Indoor Unit SLZ-AF15NL - Nominal Capacity (Tons):
1.25
Indoor Unit SLZ-AF15NL - Cooling Capacity (BTU/h):
14,100
Indoor Unit SLZ-AF15NL - Heating Capacity (BTU/h):
18,000
Indoor Unit SLZ-AF15NL - Refrigerant:
R-454B
Indoor Unit SLZ-AF15NL - Airflow (CFM):
245-315-405 (cool/heat dry)
Indoor Unit SLZ-AF15NL - Sound Level (dB):
27-34-39
Indoor Unit SLZ-AF15NL - Liquid Line Size:
1/4 in
Indoor Unit SLZ-AF15NL - Suction Line Size:
1/2 in
Indoor Unit SLZ-AF15NL - Unit Dimensions (W x D x H):
22.44 in x 22.44 in x 8.25 in
Indoor Unit SLZ-AF15NL - Unit Weight:
31 lb
Indoor Unit SLZ-AF15NL - Shipping Weight:
36 lb
Replaces Models:
MUF15EN, MUF15EN2, SUZ-KA15NA, SUZ-KA15NA2, SUZ-KA15NAR1, SLZ-KA15NA, SLZ-KA15NAR1, SLZ-KF15NA, SLZ-KF15NA1
Please Note: To validate the manufacturer's warranty, equipment must be installed by a qualified licensed professional in accordance with local codes and the manufacturer's installation requirements.

2023 Energy Standards

Department of Energy (DOE) State Regulations – Effective 2023

Click the link below to view the energy standards applicable to your region.

DOE State Standards Document

Department of Energy (DOE) State Regulations – Effective 2023

Click the link below to view the energy standards applicable to your region.

DOE State Standards Document

Documents & warranty
Warranty
7 Years Compressor & 5 Years Parts | Registration Required within 90 Days of Purchase
Videos2 videos
How A Heat Pump Works - Mitsubishi Electric Heating & Cooling
Frequently asked questions
How much cooling does the provide?
It is rated for 15,000 BTU of cooling.
What size is the ?
The is a 1.5 ton unit.
How many zones does the support?
It supports 1 zone(s).
What is the SEER2 rating of the ?
The is rated at 20+ SEER2 SEER2.
What is the HSPF2 heating efficiency of the ?
It is rated at 10+ HSPF2 HSPF2.
How cold can it be outside for the to keep heating?
It is rated to heat down to -4 °F outdoors.
What refrigerant does the use?
It uses R-454B refrigerant.
Can the be controlled over Wi-Fi?
Optional Kit.
How loud is the outdoors?
The rated outdoor sound level is 49 dB.
What power supply does the need?
It requires 208/230V 1-Phase power.
Which models does the replace?
MUF15EN, MUF15EN2, SUZ-KA15NA, SUZ-KA15NA2, SUZ-KA15NAR1, SLZ-KA15NA, SLZ-KA15NAR1, SLZ-KF15NA, SLZ-KF15NA1
What warranty comes with the SUZ-AA15NL-SLZ-AF15NL?
7 Years Compressor & 5 Years Parts | Registration Required within 90 Days of Purchase
Who makes the SUZ-AA15NL-SLZ-AF15NL?
The SUZ-AA15NL-SLZ-AF15NL is made by Mitsubishi Electric.

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