SplitAtlas

Mitsubishi Electric / MXZ SMART MULTI H2i

Mitsubishi MXZ SMART MULTI H2i 48k R-454B 208/230V 8-Zone Mini-Split

Certified capacity
48,000 BTU/h[2]
SEER2
23 SEER2[2]
Heating floor
-24 F[1]
Voltage
208/230V[1]
Install path
Professional install

The MXZ-SM48NLHZ is Mitsubishi's whole-home Hyper-Heat flagship: up to eight zones and 48,000 BTU on one outdoor unit, SMART MULTI efficiency (certified nominal SEER2 23, EER2 13.1, HSPF2 11.5), plus H2i for deep cold across the entire house. It is the highest-rated eight-zone system we list and the answer for a large cold-climate home that wants one condenser to heat and cool everything, hard, through winter. R-454B, ENERGY STAR certified, professional dealer install.

8 zonesProfessional installCurrent

Refrigerant generation

R-454B - current-generation refrigerant

Need this installed?

Get installation quotes
Error Codes
Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ)

Image: Mitsubishi Electric

Data completeness: 97%
Last sourced
Jul 27, 2026

SplitAtlas score

9.3 / 10

Methodology
Cooling efficiencyTop 10%

(23.0 SEER2) among >36k systems

Heating efficiencyTop 10%

(11.5 HSPF2) among >36k systems

Cold-weather performanceTop 10%

(100% heat retained at 5F; -24 F heating floor) among >36k systems

WarrantyTop quartile

(12 yr parts / 12 yr compressor) across the catalogue

Feature setBottom quartile

(2 verified features) across the catalogue

Documentation & partsTop quartile

(5 manuals; spec sheet; parts channel) across the catalogue

Not evaluated

  • Installation accessibility — not applicable (professional install)N/A

    professional install - DIY-accessibility not applicable

  • Price-to-value — not evaluatedN/A

    This is a professionally installed, quote-only system, so we can't score its price. Get an installed quote to compare real cost.

    Get a quote

Key ratings

Rated cooling

48,000BTU/hNon-Ducted Indoor Units[2]

Rated heating

54,000BTU/hNon-Ducted Indoor Units[2]

Best-fit use cases

A large home in a cold climate that wants one Mitsubishi condenser to cover the whole house and still heat hard in deep winter - the eight-zone Hyper-Heat done to the top of the line.

Buyer review snapshot

Best for / skip if

Best for

  • 8-zone projects in the 48k outdoor capacity class.
  • High-efficiency shortlists; SEER2 is 23.

Install difficulty

Complex professional install
  • Electrical: 208/230V; MCA 51 A; breaker/fuse 86 A.
  • Line set: connection type not sourced; max 492 ft.
  • 8-zone condenser; indoor-head matching and branch layout are part of the job.

Availability and price context

We could not verify a current retail price for this model. Mitsubishi Electric sells through dealers, so we link to contractor quotes rather than a retail price.

Source date

Model data sourced
Jul 27, 2026
Page reviewed
Jul 27, 2026
Source-backed records
4
Newest source retrieved
Jul 27, 2026

Warranty tiers

Warranty: 5 years parts and 7 years compressor as standard; 12 years parts and compressor if owner-occupied residence installed and registered by a Diamond Contractor within 90 days.

Review methodology

Strengths

  • Whole-home Hyper-Heat: up to eight zones with genuine deep-cold heating on one outdoor unit.
  • Top-tier certified nominal SEER2 23 / EER2 13.1 / HSPF2 11.5, ENERGY STAR certified.
  • Newest SMART MULTI platform and current R-454B refrigerant.
  • Mitsubishi dealer network, documentation, and cold-climate track record at whole-home scale.

Weaknesses

  • The largest, most premium multi-zone here - professional dealer install and a substantial quote-based price.
  • 48,000 BTU shared across up to eight zones is modest per room; balance the head sizes carefully.
  • Multi-zone part-load penalty when only a zone or two is calling.

Climate suitability

Minimum heating ambient
-24 F[1]
Rated heating at 5F
54,000 BTU/hNon-Ducted Indoor Units[2]
Rated heating at 17F
38,000 BTU/hNon-Ducted Indoor Units[2]
Rated heating at 47F
54,000 BTU/hNon-Ducted Indoor Units[2]

Specifications

Show
Manufacturer
Mitsubishi Electric
Brand
Mitsubishi Electric
Product line
MXZ SMART MULTI H2i
Model number
MXZ-SM48NLHZ
Indoor unit model
Indoor heads are selected separately on a multi-zone system
Outdoor unit model
MXZ-SM48NLHZ
Number of zones
8
Max indoor units
8 units[1]
Rated cooling capacity
48,000 BTU/hNon-Ducted Indoor Units[2]
Rated heating capacity
54,000 BTU/hNon-Ducted Indoor Units[2]
Voltage
208/230V[1]
MCA
51 A[1]
Maximum fuse or breaker size
86 A[1]
Breaker needed
not published
SEER2
23 SEER2Non-Ducted Indoor Units[2]
EER2
13.1 EER2Non-Ducted Indoor Units[2]
HSPF2 (Region 4)
11.5 HSPF2Non-Ducted Indoor Units[2]
HSPF2 (Region 5)
Certified per indoor-unit combination, not per outdoor unit
COP
not published
COP at 47F
not published
COP at 5F
not published
Minimum outdoor heating temperature
-24 F[1]
Minimum outdoor cooling temperature
23 F[1]
Maximum outdoor temperature
115 F[1]
Indoor noise range
Indoor heads are selected separately on a multi-zone system
Outdoor noise rating
54 dBA[1]
Indoor weight
Indoor heads are selected separately on a multi-zone system
Outdoor weight
283 lb[1]
Refrigerant
R-454B[2]
Refrigerant charge
106 oz[1]
Manufacturer coverage
not published
Line-set size
3/8 in liquid / 5/8 in suction
Included line-set length
Indoor heads are selected separately on a multi-zone system
Maximum line-set length
492 ft[1]
Max line set per indoor
262 ft[1]
Maximum elevation difference
164 ft[1]
Max height between indoor units
49 ft[1]
Wi-Fi support
Indoor heads are selected separately on a multi-zone system
Energy Star status
ENERGY STAR certified[3]
AHRI certification number
217177367Non-Ducted Indoor Units[2]
Warranty
Standard: 5 yr parts / 7 yr compressor (licensed HVAC contractor installation); Best case: 12 yr parts / 12 yr compressor (owner-occupied residence installed and registered by a Diamond Contractor within 90 days). Standard residential M-Series and SMART MULTI warranty is 5 years parts and 7 years compressor from installation by a licensed HVAC contractor. Enhanced registered owner-occupied terms can extend to 10 years, or 12 years when installed and registered by a Diamond Contractor.
Install path
Professional install
Retail price
Mitsubishi Electric sells through dealers, so we link to contractor quotes rather than a retail price.
Available retailers
not published
Manual links
AHRI public detail 217177367, ENERGY STAR direct rows for Mitsubishi MXZ, Mitsubishi Electric MXZ SMART MULTI product launch guide, MXZ-SM48NLHZ Mitsubishi Electric MXZ SMART MULTI H2i submittal, METUS Residential M-Series, P-Series and SMART MULTI Limited Warranty Statement
Specification sheet
MXZ-SM48NLHZ Mitsubishi Electric MXZ SMART MULTI H2i submittal
Last sourced date
Jul 27, 2026

Compatible indoor units

This is an outdoor unit. You choose its indoor heads separately - up to the maximum this condenser supports - and you can mix room sizes and styles across the zones. The models below are the heads this unit is documented to pair with.

  • Concealed ducteds

    9k, 12k, 15k, 18k, 24k, 30k, 36k

    Model numbers
    • 9k: PEAD-AA09NL
    • 9k: SEZ-AD09NL
    • 12k: PEAD-AA12NL
    • 12k: SEZ-AD12NL
    • 15k: PEAD-AA15NL
    • 15k: SEZ-AD15NL
    • 18k: PEAD-AA18NL
    • 18k: SEZ-AD18NL
    • 24k: PEAD-AA24NL
    • 30k: PEAD-AA30NL
    • 36k: PEAD-AA36NL

  • Floor-mounted consoles

    9k, 12k, 15k, 18k

    Model numbers
    • 9k: MFZ-KX09NL
    • 12k: MFZ-KX12NL
    • 15k: MFZ-KX15NL
    • 18k: MFZ-KX18NL

  • Four-way ceiling cassettes

    9k, 12k, 15k, 18k, 24k, 30k, 36k

    Model numbers
    • 9k: SLZ-AF09NL
    • 12k: PLA-AE12NL
    • 12k: SLZ-AF12NL
    • 15k: SLZ-AF15NL
    • 18k: PLA-AE18NL
    • 24k: PLA-AE24NL
    • 30k: PLA-AE30NL
    • 36k: PLA-AE36NL

  • Multi-position air handlers

    12k, 18k, 24k, 30k, 36k

    Model numbers
    • 12k: SVZ-AP12NL
    • 18k: PAA-AA18NL
    • 18k: PAA-BA18NL
    • 18k: PAA-CA18NL
    • 18k: SVZ-AP18NL
    • 24k: PAA-AA24NL
    • 24k: PAA-BA24NL
    • 24k: PAA-CA24NL
    • 24k: SVZ-AP24NL
    • 30k: PAA-AA30NL
    • 30k: PAA-BA30NL
    • 30k: PAA-CA30NL
    • 30k: SVZ-AP30NL
    • 36k: PAA-AA36NL
    • 36k: PAA-BA36NL
    • 36k: PAA-CA36NL
    • 36k: SVZ-AP36NL

  • One-way ceiling cassettes

    6k, 9k, 12k, 18k

    Model numbers
    • 6k: MLZ-KX06NL
    • 9k: MLZ-KX09NL
    • 12k: MLZ-KX12NL
    • 18k: MLZ-KX18NL

  • Wall-mounteds

    6k, 9k, 12k, 15k, 18k, 24k

    Model numbers
    • 6k: MSZ-FX06NL
    • 6k: MSZ-GX06NL
    • 9k: MSZ-FX09NL
    • 9k: MSZ-GX09NL
    • 12k: MSZ-FX12NL
    • 12k: MSZ-GX12NL
    • 15k: MSZ-FX15NL
    • 15k: MSZ-GX15NL
    • 18k: MSZ-FX18NL
    • 18k: MSZ-GX18NL
    • 24k: MSZ-GX24NL

Sizing note: do not just add up the rooms. Multi-zone condensers have a maximum total connected capacity, and connecting more head capacity than the unit is rated for is a common installer mistake that hurts efficiency and comfort. Match total head capacity to the condenser's rating.

Parts and filters

Fits Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ). Part numbers and fit notes identify compatibility only; no manufacturer endorsement is implied.

branch-box

Mitsubishi 3-port branch box

Fits
Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ)
OEM part number
PAC-LMA30BC
Fit note
Fits MXZ-SM48NLHZ. Manufacturer documentation publishes this OEM part number for this model family. No live HVACDirect exact-part offer was found; source through an authorized Mitsubishi Electric dealer with the model and serial number.
Source
Mitsubishi Electric MXZ-SM48NLHZ Submittal, OUTDOOR UNIT ACCESSORIES: MXZ-SM48NLHZ, page p. 3 (3 Port Branch Box PAC-LMA30BC)

branch-box

Mitsubishi 5-port branch box

Fits
Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ)
OEM part number
PAC-LMA50BC
Fit note
Fits MXZ-SM48NLHZ. Manufacturer documentation publishes this OEM part number for this model family. No live HVACDirect exact-part offer was found; source through an authorized Mitsubishi Electric dealer with the model and serial number.
Source
Mitsubishi Electric MXZ-SM48NLHZ Submittal, OUTDOOR UNIT ACCESSORIES: MXZ-SM48NLHZ, page p. 3 (5 Port Branch Box PAC-LMA50BC)

branch-box-enclosure

Mitsubishi branch box enclosure

Fits
Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ)
OEM part number
BBE-1
Fit note
Fits MXZ-SM48NLHZ. Manufacturer documentation publishes this OEM part number for this model family. No live HVACDirect exact-part offer was found; source through an authorized Mitsubishi Electric dealer with the model and serial number.
Source
Mitsubishi Electric MXZ-SM48NLHZ Submittal, OUTDOOR UNIT ACCESSORIES: MXZ-SM48NLHZ, page p. 3 (Branch Box Enclosure BBE-1)

centralized-drain-pan

Mitsubishi centralized drain pan

Fits
Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ)
OEM part number
PAC-SH97DP-E
Fit note
Fits MXZ-SM48NLHZ. Manufacturer documentation publishes this OEM part number for this model family. No live HVACDirect exact-part offer was found; source through an authorized Mitsubishi Electric dealer with the model and serial number.
Source
Mitsubishi Electric MXZ-SM48NLHZ Submittal, OUTDOOR UNIT ACCESSORIES: MXZ-SM48NLHZ, page p. 3 (Centralized Drain Pan Centralized Drain Pan PAC-SH97DP-E)

drain-socket

Mitsubishi drain socket

Fits
Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ)
OEM part number
PAC-SG60DS-E
Fit note
Fits MXZ-SM48NLHZ. Manufacturer documentation publishes this OEM part number for this model family. No live HVACDirect exact-part offer was found; source through an authorized Mitsubishi Electric dealer with the model and serial number.
Source
Mitsubishi Electric MXZ-SM48NLHZ Submittal, OUTDOOR UNIT ACCESSORIES: MXZ-SM48NLHZ, page p. 3 (Drain Socket Drain Socket PAC-SG60DS-E)

snow-rain-diverter

Mitsubishi snow/rain diverter

Fits
Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ)
OEM part number
SRD-5
Fit note
Fits MXZ-SM48NLHZ. Manufacturer documentation publishes this OEM part number for this model family. No live HVACDirect exact-part offer was found; source through an authorized Mitsubishi Electric dealer with the model and serial number.
Source
Mitsubishi Electric MXZ-SM48NLHZ Submittal, OUTDOOR UNIT ACCESSORIES: MXZ-SM48NLHZ, page p. 3 (Snow/Rain Diverter SnowRain Diverter SRD-5)
Replacement Parts & Filters

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
51 A[1]
Breaker needed
not published
Maximum breaker size
86 A[1]
Maximum fuse size
not published
Maximum cooling current
not published
Maximum heating current
not published
Manufacturer wire notes
not published

Installation considerations

Show
Liquid line
3/8 in[1]
Suction line
5/8 in[1]
Line connection type
not published
Precharged length
not published
Included line-set length
Indoor heads are selected separately on a multi-zone system
Maximum line-set length
492 ft[1]
Max line set per indoor
262 ft[1]
Max height between indoor units
49 ft[1]
Indoor dimensions
Indoor heads are selected separately on a multi-zone system
Outdoor dimensions
41-11/32 x 13 x 52-11/16 in[1]
Indoor weight
Indoor heads are selected separately on a multi-zone system
Outdoor weight
283 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ) myself, or do I need a pro?
Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ) is built for professional installation: the line set must be flared, evacuated, and charged, which requires EPA-certified refrigerant handling. Installing it outside the manufacturer's requirements can void the warranty, so budget for a qualified HVAC installer.
Will the Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ) keep heating in a cold winter?
The manufacturer publishes 54,000 BTU/h of heating output at 5F. Rated heating operation extends down to -24 F. Certified heating efficiency is 11.5 HSPF2. Match those numbers against your climate's design temperature - in cold regions, output at 5F matters far more than the nameplate capacity measured at 47F.
What electrical circuit does the Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ) need?
Published electrical requirements: 208/230V voltage, 51 A minimum circuit ampacity, and 86 A maximum breaker or fuse sizing. Confirm the final circuit against the unit nameplate and local code with a licensed electrician.
How far can the outdoor unit be from the indoor head?
The published maximum line-set length is 492 ft. Longer runs than the included set allows typically mean added refrigerant and a pro visit, so measure the planned routing before ordering.
What warranty does the Mitsubishi Electric MXZ SMART MULTI H2i 8-Zone 48,000 BTU R-454B 208/230V (MXZ-SM48NLHZ) carry?
The manufacturer publishes these warranty tiers: Standard: 5 yr parts / 7 yr compressor (licensed HVAC contractor installation); Best case: 12 yr parts / 12 yr compressor (owner-occupied residence installed and registered by a Diamond Contractor within 90 days). Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.

Data sources

Show
  1. Mitsubishi Electric Trane HVAC US LLC: MXZ-SM48NLHZ Mitsubishi Electric MXZ SMART MULTI H2i submittalSourced - manufacturer technical document

    Covers Frequency, electrical_spec.guaranteed_voltage_range, Maximum breaker size, Minimum circuit ampacity, Phase, Voltage range and more

  2. Air-Conditioning, Heating, and Refrigeration Institute: AHRI public detail 217177367Sourced - AHRI directory

    Covers AHRI certification number, Rated cooling capacity, EER2, Rated heating capacity, HSPF2 (Region 4), Rated heating at 17F and more

  3. ENERGY STAR: ENERGY STAR Central Air Conditioners and Air-Source Heat Pumps product data rows for Mitsubishi MXZSourced - Energy Star listing

    Covers Energy Star status

  4. Mitsubishi Electric Trane HVAC US LLC: METUS Residential M-Series, P-Series and SMART MULTI Limited Warranty StatementSourced - secondary source

    Covers Best-case compressor warranty, Best-case warranty conditions, Best-case parts warranty, Legacy compressor warranty value, Legacy warranty value, Standard compressor warranty and more

Last updated

Jul 27, 2026