SplitAtlas

Mitsubishi Electric / MXZ-D Ported Multi-Zone H2i

Mitsubishi MXZ-D Ported H2i 24k R-454B 208/230V 3-Zone Mini-Split

Certified capacity
22,000 BTU/h[2]
SEER2
20 SEER2[2]
Heating floor
-12 F[1]
Voltage
208/230V[1]
Install path
Professional install

The MXZ-3D24NLHZ is the Hyper-Heat three-zone: the same 24k, three-head, single-circuit platform as the standard 3D24NL, with H2i for real sub-freezing heating. It holds the same certified nominal SEER2 of 20 and adds the cold-climate compressor, making it the three-zone MXZ-D to pick anywhere winters are serious. R-454B refrigerant, ENERGY STAR certified, professional dealer install.

3 zonesProfessional installCurrent

Refrigerant generation

R-454B - current-generation refrigerant

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Error Codes
Mitsubishi Electric MXZ-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ)

Image: Mitsubishi Electric

Data completeness: 97%
Last sourced
Jul 27, 2026

SplitAtlas score

8.5 / 10

Methodology
Cooling efficiencyBelow average

(20.0 SEER2) among 24k systems

Heating efficiencyAbove average

(10.0 HSPF2) among 24k systems

Cold-weather performanceTop 10%

(100% heat retained at 5F; -12 F heating floor) among 24k 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

22,000BTU/hNon-Ducted Indoor Units[2]

Rated heating

25,000BTU/hNon-Ducted Indoor Units[2]

Buyer review snapshot

Best for / skip if

Best for

  • 3-zone projects in the 24k outdoor capacity class.

Install difficulty

Complex professional install
  • Electrical: 208/230V; MCA 29 A; breaker/fuse 49 A.
  • Line set: connection type not sourced; precharged 230 ft; max 230 ft.
  • 3-zone condenser; indoor-head matching and branch layout are part of the job.

Alternatives

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

  • H2i Hyper-Heat three-zone: genuine deep-cold heating across a whole small floor from one outdoor unit.
  • Certified nominal SEER2 20 / HSPF2 10, ENERGY STAR certified - no seasonal-cooling penalty versus the standard 3D24NL.
  • Current R-454B refrigerant; Mitsubishi dealer network and cold-climate reputation.

Weaknesses

  • Professional dealer installation required; quote-based pricing.
  • Shared three-zone capacity - size to the condenser's total, not the sum of three rooms.
  • Standard part-load penalty when a single small zone runs alone.

Climate suitability

Minimum heating ambient
-12 F[1]
Rated heating at 5F
25,000 BTU/hNon-Ducted Indoor Units[2]
Rated heating at 17F
15,400 BTU/hNon-Ducted Indoor Units[2]
Rated heating at 47F
25,000 BTU/hNon-Ducted Indoor Units[2]

Specifications

Show
Manufacturer
Mitsubishi Electric
Brand
Mitsubishi Electric
Product line
MXZ-D Ported Multi-Zone H2i
Model number
MXZ-3D24NLHZ
Indoor unit model
Indoor heads are selected separately on a multi-zone system
Outdoor unit model
MXZ-3D24NLHZ
Number of zones
3
Max indoor units
3 units[1]
Rated cooling capacity
22,000 BTU/hNon-Ducted Indoor Units[2]
Rated heating capacity
25,000 BTU/hNon-Ducted Indoor Units[2]
Voltage
208/230V[1]
MCA
29 A[1]
Maximum fuse or breaker size
49 A[1]
Breaker needed
not published
SEER2
20 SEER2Non-Ducted Indoor Units[2]
EER2
13 EER2Non-Ducted Indoor Units[2]
HSPF2 (Region 4)
10 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
-12 F[1]
Minimum outdoor cooling temperature
14 F[1]
Maximum outdoor temperature
115 F[1]
Indoor noise range
Indoor heads are selected separately on a multi-zone system
Outdoor noise rating
58 dBA[1]
Indoor weight
Indoor heads are selected separately on a multi-zone system
Outdoor weight
152 lb[1]
Refrigerant
R-454B[2]
Refrigerant charge
99 oz[1]
Manufacturer coverage
not published
Line-set size
1/4 in all ports liquid / 1/2 in ports A; 3/8 in ports B/C suction
Included line-set length
Indoor heads are selected separately on a multi-zone system
Maximum line-set length
230 ft[1]
Max line set per indoor
82 ft[1]
Maximum elevation difference
49 ft[1]
Max height between indoor units
MXZ-D direct-port submittals publish ODU-to-IDU elevation limits but no separate indoor-to-indoor height-difference limit.
Wi-Fi support
Indoor heads are selected separately on a multi-zone system
Energy Star status
ENERGY STAR certified[3]
AHRI certification number
216505933Non-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 216505933, ENERGY STAR direct rows for Mitsubishi MXZ, Mitsubishi Electric MXZ-D product launch guide, MXZ-3D24NLHZ Mitsubishi Electric MXZ-D Ported Multi-Zone H2i submittal, METUS Residential M-Series, P-Series and SMART MULTI Limited Warranty Statement
Specification sheet
MXZ-3D24NLHZ Mitsubishi Electric MXZ-D Ported Multi-Zone H2i submittal
Last sourced date
Jul 27, 2026

Parts and filters

Fits Mitsubishi Electric MXZ-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ). Part numbers and fit notes identify compatibility only; no manufacturer endorsement is implied.

control-interface

Mitsubishi M-NET Interface for MXZ

Fits
Mitsubishi Electric MXZ-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ)
OEM part number
PAC-IF01MNT-E
Fit note
Fits MXZ-3D24NLHZ. 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-3D24NLHZ Submittal, OUTDOOR UNIT ACCESSORIES: MXZ-3D24NLHZ, page p. 3 (Control Interface M-NET Interface for MXZ PAC-IF01MNT-E)

service-tool-interface

Mitsubishi Maintenance Tool Interface

Fits
Mitsubishi Electric MXZ-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ)
OEM part number
PAC-USCMS-MN-1
Fit note
Fits MXZ-3D24NLHZ. 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-3D24NLHZ Submittal, OUTDOOR UNIT ACCESSORIES: MXZ-3D24NLHZ, page p. 3 (Control/Service Tool Maintenance Tool Interface PAC-USCMS-MN-1)

drain-socket

Mitsubishi drain socket

Fits
Mitsubishi Electric MXZ-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ)
OEM part number
PAC-SG60DS-E
Fit note
Fits MXZ-3D24NLHZ. 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-3D24NLHZ Submittal, OUTDOOR UNIT ACCESSORIES: MXZ-3D24NLHZ, page p. 3 (Drain Socket Drain Socket PAC-SG60DS-E)

air-outlet-guide

Mitsubishi air outlet guide

Fits
Mitsubishi Electric MXZ-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ)
OEM part number
PAC-SH96SG-E
Fit note
Fits MXZ-3D24NLHZ. 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-3D24NLHZ Submittal, OUTDOOR UNIT ACCESSORIES: MXZ-3D24NLHZ, page p. 3 (Air Outlet Guide Air Outlet Guide 1 Piece PAC-SH96SG-E)

snow-rain-diverter

Mitsubishi snow/rain diverter

Fits
Mitsubishi Electric MXZ-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ)
OEM part number
SRD-4
Fit note
Fits MXZ-3D24NLHZ. 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-3D24NLHZ Submittal, OUTDOOR UNIT ACCESSORIES: MXZ-3D24NLHZ, page p. 3 (Snow/Rain Diverter SnowRain Diverter SRD-4)
Replacement Parts & Filters

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
29 A[1]
Breaker needed
not published
Maximum breaker size
49 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
1/4 in all ports[1]
Suction line
1/2 in ports A; 3/8 in ports B/C[1]
Line connection type
not published
Precharged length
230 ft[1]
Included line-set length
Indoor heads are selected separately on a multi-zone system
Maximum line-set length
230 ft[1]
Max line set per indoor
82 ft[1]
Max height between indoor units
MXZ-D direct-port submittals publish ODU-to-IDU elevation limits but no separate indoor-to-indoor height-difference limit.
Indoor dimensions
Indoor heads are selected separately on a multi-zone system
Outdoor dimensions
37-13/32 x 13 x 31-11/32 in[1]
Indoor weight
Indoor heads are selected separately on a multi-zone system
Outdoor weight
152 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Mitsubishi Electric MXZ-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ) myself, or do I need a pro?
Mitsubishi Electric MXZ-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ) 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-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ) keep heating in a cold winter?
The manufacturer publishes 25,000 BTU/h of heating output at 5F. Rated heating operation extends down to -12 F. Certified heating efficiency is 10 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-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ) need?
Published electrical requirements: 208/230V voltage, 29 A minimum circuit ampacity, and 49 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 230 ft, and the included line set comes pre-charged for 230 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-D Ported Multi-Zone H2i 3-Zone 24,000 BTU R-454B 208/230V (MXZ-3D24NLHZ) 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-3D24NLHZ Mitsubishi Electric MXZ-D Ported Multi-Zone 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 216505933Sourced - 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