Name: Mitsubishi Electric 42,000 BTU 21 SEER2 Hyper-Heat Smart Multi Quad Zone 4-Way Ceiling Cassette Ductless Mini Split Heat Pump System 12+12+15+15 with Branch Box R454B | MXZ-SM42NLHZ-SLZ-AF12NL-SLZ-AF12NL-SLZ-AF15NL-SLZ-AF15NL-PAC-LMA50BC
Brand: Mitsubishi Electric
SKU: MXZ-SM42NLHZ-SLZ-AF12NL-SLZ-AF12NL-SLZ-AF15NL-SLZ-AF15NL-PAC-LMA50BC
Price: 25939.02 USD
Availability: InStock

Mitsubishi Electric 42,000 BTU 21 SEER2 Hyper-Heat Smart Multi Quad Zone 4-Way Ceiling Cassette Ductless Mini Split Heat Pump System 12+12+15+15 with Branch Box R454B | MXZ-SM42NLHZ-SLZ-AF12NL-SLZ-AF12NL-SLZ-AF15NL-SLZ-AF15NL-PAC-LMA50BC

Description

Overview

This Mitsubishi Electric Hyper-Heat Smart Multi heat pump system pairs the MXZ-SM42NLHZ outdoor unit with 4 SLZ-AF 4-way ceiling cassette indoor units connected through a branch box for quad-zone heating and cooling. Every indoor unit uses the same mount style, so each room gets matching appearance, airflow and controls. The system runs on 208/230V, 1-phase, 60 Hz power and uses R-454B refrigerant.

What Is Included

1 x MXZ-SM42NLHZ Smart Multi outdoor unit
2 x SLZ-AF12NL (12,000 BTU class SLZ-AF 4-way ceiling cassette)
2 x SLZ-AF15NL (15,000 BTU class SLZ-AF 4-way ceiling cassette)
1 x PAC-LMA50BC 5-port branch box

Required grille (sold separately): SLP-18FAU for each cassette.

Performance

Non-ducted system ratings for the MXZ-SM42NLHZ: up to 21.5 SEER2, 13.4 EER2 and 11.1 HSPF2, with rated capacities of 42,000 BTU/h cooling and 48,000 BTU/h heating. Connected indoor capacity for this combination totals 54,000 BTU/h class (12K + 12K + 15K + 15K). Heating operation is rated down to -13 F outdoor temperature with Hyper-Heat performance. Final efficiency depends on the exact AHRI-matched combination.

Comfort and Noise

Each zone has its own indoor unit and controller, so occupied rooms can be conditioned independently. The INVERTER-driven compressor modulates capacity to hold set points closely and reduce on/off cycling.

Smart Features

Wi-Fi control through the Mitsubishi Electric Comfort app is available with the optional Wi-Fi interface kit. Each indoor unit supports Mitsubishi Electric wireless or wired controllers.

Use Case Fit

Ceiling cassettes recess into the ceiling for a low-profile look where ceiling cavity depth allows. Confirm room loads, line set lengths, branch box location and electrical requirements before ordering.

Value and Reliability

Bundling the outdoor unit, matched indoor units and branch boxes in one product simplifies ordering. Warranty: 7 Years Compressor & 5 Years Parts | Registration Required within 90 Days of Purchase

Key Features

Quad-zone Smart Multi system: 12K + 12K + 15K + 15K
Non-ducted rating up to 21.5 SEER2 / 11.1 HSPF2
Branch box(es) included: PAC-LMA50BC
R-454B refrigerant
Single mount style throughout: Ceiling Recessed

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.

Quick sizing snapshot

Enter your home size and a few basics to see a quick HVAC365 sizing snapshot you can review with a Professional.

Home size (sq ft)

Enter at least 100 sq ft.

Use conditioned square footage only; skip garages and unfinished basements.

Climate

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Home type

Select your home type.

Shared walls and insulation levels change the load—pick what matches your structure.

System type

Choose a system type.

Match the system to your ductwork, fuel, or preferred heat source for best comfort.

This is a sizing estimate for general guidance only. Always confirm final size, duct design, and fuel type with a Professional before purchasing equipment or pulling permits.

Brand:

Mitsubishi Electric

Weight:

469.00 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):

42,000

Capacity (Tons):

3.5

Zones:

Mount Type:

Ceiling Recessed

System Type:

Heat Pump

SEER2:

20+ SEER2

EER2:

13+ EER2

HSPF2:

10+ HSPF2

Cold Climate:

Yes

Minimum Heating Temp (°F):

-13

Refrigerant Type:

R-454B

Voltage (delete):

208/230V

Electrical Phase:

1-Phase

Voltage / Phase:

208/230V 1-Phase

Sound Level Outdoor (dB):

Indoor Unit Combination:

12K + 12K + 15K + 15K

Wi-Fi Control:

Optional Kit

Product Line:

MXZ Smart Multi Hyper-Heat

Compressor Stages:

Variable Speed

DOE Regional Compliance:

Nationwide

Branch Boxes Included:

1 x PAC-LMA50BC

AHRI Rating Basis:

Non-Ducted system rating (submittal)

Required Grille (Sold Separately):

SLP-18FAU (one per cassette)

Outdoor Unit MXZ-SM42NLHZ - Nominal Capacity (Tons):

3.5

Outdoor Unit MXZ-SM42NLHZ - Cooling Capacity (BTU/h):

42,000

Outdoor Unit MXZ-SM42NLHZ - Heating Capacity (BTU/h):

48,000

Outdoor Unit MXZ-SM42NLHZ - Refrigerant:

R-454B

Outdoor Unit MXZ-SM42NLHZ - Voltage/Phase/Hz:

208-230 V / 1 Ph / 60 Hz

Outdoor Unit MXZ-SM42NLHZ - Minimum Circuit Ampacity (MCA):

45 A

Outdoor Unit MXZ-SM42NLHZ - Maximum Overcurrent Protection (MOP):

80 A

Outdoor Unit MXZ-SM42NLHZ - Compressor Type:

Inverter Scroll

Outdoor Unit MXZ-SM42NLHZ - Minimum Heating Temp (F):

-13 F

Outdoor Unit MXZ-SM42NLHZ - Sound Level (dB):

Outdoor Unit MXZ-SM42NLHZ - Liquid Line Size:

3/8 in

Outdoor Unit MXZ-SM42NLHZ - Suction Line Size:

5/8 in

Outdoor Unit MXZ-SM42NLHZ - Unit Dimensions (W x D x H):

41.34 in x 13 in x 52.69 in

Outdoor Unit MXZ-SM42NLHZ - Unit Weight:

283 lb

Outdoor Unit MXZ-SM42NLHZ - Shipping Weight:

309 lb

Indoor Unit SLZ-AF12NL - Type:

Ceiling Cassette

Indoor Unit SLZ-AF12NL - Nominal Capacity (Tons):

Indoor Unit SLZ-AF12NL - Cooling Capacity (BTU/h):

12,000

Indoor Unit SLZ-AF12NL - Heating Capacity (BTU/h):

13,000

Indoor Unit SLZ-AF12NL - Refrigerant:

R-454B

Indoor Unit SLZ-AF12NL - Airflow (CFM):

230-280-335 (cool/heat dry)

Indoor Unit SLZ-AF12NL - Sound Level (dB):

25-30-34

Indoor Unit SLZ-AF12NL - Liquid Line Size:

1/4 in

Indoor Unit SLZ-AF12NL - Suction Line Size:

3/8 in

Indoor Unit SLZ-AF12NL - Unit Dimensions (W x D x H):

22.44 in x 22.44 in x 8.25 in

Indoor Unit SLZ-AF12NL - Unit Weight:

31 lb

Indoor Unit SLZ-AF12NL - Shipping Weight:

36 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

Branch Box PAC-LMA50BC - Ports:

Branch Box PAC-LMA50BC - Indoor Liquid Connections:

1/4 in (Ports A-E)

Branch Box PAC-LMA50BC - Indoor Gas Connections:

3/8 in (Ports A-D); 1/2 in (Port E)

Branch Box PAC-LMA50BC - Outdoor Liquid Connection:

3/8 in

Branch Box PAC-LMA50BC - Outdoor Gas Connection:

5/8 in

Branch Box PAC-LMA50BC - Voltage/Phase/Hz:

208-230 V / 1 Ph / 60 Hz

Branch Box PAC-LMA50BC - Unit Dimensions (W x D x H):

17.75 in x 11.06 in x 6.75 in

Branch Box PAC-LMA50BC - Unit Weight:

16 lb

Branch Box PAC-LMA50BC - Power Input:

0.003 kW

Branch Box PAC-LMA50BC - Running Current:

0.15 A

Indoor Unit SLZ-AF12NL - Quantity:

Indoor Unit SLZ-AF15NL - Quantity:

Branch Box PAC-LMA50BC - Quantity:

Warranty Information

7 Years Compressor & 5 Years Parts | Registration Required within 90 Days of Purchase

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

Mitsubishi Electric 42,000 BTU 21 SEER2 Hyper-Heat Smart Multi Quad Zone 4-Way Ceiling Cassette Ductless Mini Split Heat Pump System 12+12+15+15 with Branch Box R454B | MXZ-SM42NLHZ-SLZ-AF12NL-SLZ-AF12NL-SLZ-AF15NL-SLZ-AF15NL-PAC-LMA50BC