SplitAtlas

Mitsubishi Electric / M-Series GS

Mitsubishi M-Series GS 24k HZ R-410A 208/230V Mini-Split

Certified capacity
22,400 BTU/h[2]
SEER2
21.5 SEER2[2]
Heating floor
-13 F[1]
Voltage
208/230V[1]
Install path
Professional install

The Hyper-Heat (HZ) version of the discontinued GS 24k holds 21,200 BTU of heat from 47F down to 5F on the SEER2 21.5 / EER2 12.6 platform - a cold-climate 2-ton standard unit. It is R-410A and Production Stopped; the current equivalent is the R-454B GX 24k Hyper-Heat.

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Mitsubishi Electric M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ)

Image: Mitsubishi Electric

Data completeness: 95%
Last sourced
Jul 23, 2026

SplitAtlas score

8.7 / 10

Methodology
Cooling efficiencyAbove average

(21.5 SEER2) among 24k systems

Heating efficiencyAbove average

(9.0 HSPF2) among 24k systems

Cold-weather performanceTop 10%

(5F certified capacity: 100% of the 47F rating; -13 F heating floor) among 24k systems

WarrantyTop quartile

(10 yr parts / 10 yr compressor) across the catalogue

Feature setBottom quartile

(2 verified features) across the catalogue

Documentation & partsTop quartile

(9 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.

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Key ratings

Rated cooling

22,400BTU/h[2]

Rated heating

21,200BTU/h[2]

Buyer review snapshot

Best for / skip if

Skip if

  • You are shopping for a current-generation recommendation; catalog lifecycle is LEGACY.

Install difficulty

Professional install
  • Electrical: 208/230V; MCA 18 A; breaker/fuse 20 A.
  • Line set: connection type not sourced; precharged 25 ft; max 100 ft.

Alternatives

Availability and price context

This system needs a professional install, so its real price is an installed quote that depends on your home. We don't link to a listing for this exact model; get installation quotes to price it.

Source date

Model data sourced
Jul 23, 2026
Page reviewed
Jul 23, 2026
Source-backed records
5
Newest source retrieved
Sep 12, 2026

Warranty tiers

Base
5 yr parts / 7 yr compressor - licensed HVAC contractor installation
Registered
10 yr parts / 10 yr compressor - owner-occupied residence registered within 90 days of installation
Program
12 yr parts / 12 yr compressor - owner-occupied residence installed and registered by a Diamond Contractor within 90 days

The score uses Registered. Additional published terms are shown for reference and not counted in the score.

Review methodology

Model context

Structured ratings
Certification: ENERGY STAR certified and AHRI cold-climate designated. Refrigerant: R-410A. Minimum heating ambient: -13 F.

Strengths

  • Holds 21,200 BTU of heat down to 5F - strong deep-cold output at 2 tons.
  • SEER2 21.5 with Mitsubishi dealer support and reliability reputation.

Weaknesses

  • Production Stopped and R-410A - phase-out refrigerant.
  • HSPF2 9 - modest mild-weather seasonal heating.
  • The current GX 24k Hyper-Heat (R-454B) is the recommended replacement.

Climate suitability

Minimum heating ambient
-13 F[1]
Heating capacity at −13°F
14,930 BTU/h[3]
Certified heating at 5F
21,200 BTU/h[2]
Maximum heating at 5F (manufacturer)
21,200 BTU/h[1]
Rated heating at 17F
13,300 BTU/h[2]
Rated heating at 47F
21,200 BTU/h[2]

Specifications

Show
Manufacturer
Mitsubishi Electric
Brand
Mitsubishi Electric
Product line
M-Series GS
Model number
MSZ-GS24NA-U1 indoor / MUZ-GS24NAHZ-U1 outdoor
Indoor unit model
MSZ-GS24NA-U1
Outdoor unit model
MUZ-GS24NAHZ-U1
Number of zones
1
Max indoor units
not published
Rated cooling capacity
22,400 BTU/h[2]
Rated heating capacity
21,200 BTU/h[2]
Voltage
208/230V[1]
MCA
18 A[1]
Maximum fuse or breaker size
20 A[1]
Breaker needed
not published
SEER2
21.5 SEER2[2]
EER2
12.6 EER2[2]
HSPF2 (Region 4)
9 HSPF2[2]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
4.03 COP[1]
COP at 5F
1.95 COP[2]
Minimum outdoor heating temperature
-13 F[1]
Minimum outdoor cooling temperature
14 F[1]
Maximum outdoor temperature
115 F[1]
Indoor noise range
not published
Outdoor noise rating
55 dBA[1]
Indoor weight
37 lb[1]
Outdoor weight
120 lb[1]
Refrigerant
R-410A[2]
Refrigerant charge
69 oz[1]
Manufacturer coverage
not published
Line-set size
1/4 in liquid / 5/8 in suction
Included line-set length
Mitsubishi submittals publish line-size and maximum/precharged piping data; the installer supplies the line set.
Maximum line-set length
100 ft[1]
Max line set per indoor
not published
Maximum elevation difference
50 ft[1]
Max height between indoor units
not published
Wi-Fi support
supported[1]
Energy Star status
ENERGY STAR certified[2]
AHRI certification number
207679256[2]
Warranty
Base: 5 yr parts / 7 yr compressor (licensed HVAC contractor installation); Registered: 10 yr parts / 10 yr compressor (owner-occupied residence registered within 90 days of installation); Program: 12 yr parts / 12 yr compressor (owner-occupied residence installed and registered by a Diamond Contractor within 90 days). Score uses Registered. Additional published terms are shown for reference and not counted in the score.. Standard residential M-Series warranty is 5 years parts and 7 years compressor from installation by a licensed HVAC contractor. Enhanced residential terms are 10 years parts and compressor for an owner-occupied residence registered within 90 days of installation, and 12 years parts and compressor when installed in an owner-occupied residence by a Diamond Contractor and registered by that Diamond Contractor within 90 days.
Install path
Professional install
Retail price
Installed quote only
Available retailers
not published
Manual links
AHRI certificate 207679256, AHRI public detail 207679256, ENERGY STAR exact row for AHRI 207679256, M-Series GS Hyper-Heat Mitsubishi Comfort product page, M-Series GS Hyper-Heat Mitsubishi Comfort product page, MitsubishiPro product record MUZ-GS24NAHZ-U1, MSZ-GS24NA & MUZ-GS24NAHZ Mitsubishi Electric submittal, METUS Residential M-Series, P-Series and SMART MULTI Limited Warranty Statement
Specification sheet
MSZ-GS24NA & MUZ-GS24NAHZ Mitsubishi Electric submittal
Last sourced date
Jul 23, 2026

Parts and filters

Fits Mitsubishi Electric M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ). Part numbers and fit notes identify compatibility only; no manufacturer endorsement is implied.

filter-anti-allergy

Mitsubishi electro static anti-allergy enzyme filter

Fits
Mitsubishi Electric M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ)
OEM part number
MAC-2310FT-E
Filter care
Replace every year; vacuum every 3 months in between; if dirt remains, soak and rinse in lukewarm water, then shade-dry.
Fit note
Fits MSZ-GS24NA / MUZ-GS24NAHZ. 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 MSZ-GS24NA / MUZ-GS24NAHZ Submittal, INDOOR UNIT ACCESSORIES: MSZ-GS24NA, page p. 4 (Filter Electro Static Anti-allergy Enzyme Filter MAC-2310FT-E)

smart-controller-module

Mitsubishi Wireless Interface for kumo cloud

Fits
Mitsubishi Electric M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ)
OEM part number
PAC-USWHS002-WF-2
Fit note
Fits MSZ-GS24NA / MUZ-GS24NAHZ. Manufacturer documentation publishes this OEM part number for this model family. HVACDirect was verified as a live exact-part page on 2026-08-01.
Source
Mitsubishi Electric MSZ-GS24NA / MUZ-GS24NAHZ Submittal, INDOOR UNIT ACCESSORIES: MSZ-GS24NA, page p. 4 (PAC-USWHS002-WF-2)

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Paid link

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control-interface

Mitsubishi M-Net and I/O Control Interface for M-Series

Fits
Mitsubishi Electric M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ)
OEM part number
MAC-334IF-E
Fit note
Fits MSZ-GS24NA / MUZ-GS24NAHZ. Manufacturer documentation publishes this OEM part number for this model family. HVACDirect was verified as a live exact-part page on 2026-08-01.
Source
Mitsubishi Electric MSZ-GS24NA / MUZ-GS24NAHZ Submittal, INDOOR UNIT ACCESSORIES: MSZ-GS24NA, page p. 4 (M-Net & I/O Control Interface for M-Series MAC-334IF-E)

Some retailer links may earn us a commission at no extra cost; paid relationships never change scores or recommendations. Affiliate disclosure

Paid link

Check price at HVACDirect

wireless-remote-controller

Mitsubishi kumo touch RedLINK wireless controller

Fits
Mitsubishi Electric M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ)
OEM part number
MHK2
Fit note
Fits MSZ-GS24NA / MUZ-GS24NAHZ. Manufacturer documentation publishes this OEM part number for this model family. HVACDirect was verified as a live exact-part page on 2026-08-01.
Source
Mitsubishi Electric MSZ-GS24NA / MUZ-GS24NAHZ Submittal, INDOOR UNIT ACCESSORIES: MSZ-GS24NA, page p. 4 (kumo touch™ RedLINK™ Wireless Controller & Receiver kit MHK2)

Some retailer links may earn us a commission at no extra cost; paid relationships never change scores or recommendations. Affiliate disclosure

Paid link

Check price at HVACDirect

thermostat-interface

Mitsubishi thermostat interface for third-party thermostats

Fits
Mitsubishi Electric M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ)
OEM part number
PAC-US445CN-1
Fit note
Fits MSZ-GS24NA / MUZ-GS24NAHZ. Manufacturer documentation publishes this OEM part number for this model family. HVACDirect was verified as a live exact-part page on 2026-08-01.
Source
Mitsubishi Electric MSZ-GS24NA / MUZ-GS24NAHZ Submittal, INDOOR UNIT ACCESSORIES: MSZ-GS24NA, page p. 4 (Thermostat Interface for 3rd Party Thermostats PAC-US445CN-1)

Some retailer links may earn us a commission at no extra cost; paid relationships never change scores or recommendations. Affiliate disclosure

Paid link

Check price at HVACDirect

drain-hose

Mitsubishi flexible mini-split drain hose

Fits
Mitsubishi Electric M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ)
OEM part number
DRX-16
Fit note
Fits MSZ-GS24NA / MUZ-GS24NAHZ. 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 MSZ-GS24NA / MUZ-GS24NAHZ Submittal, INDOOR UNIT ACCESSORIES: MSZ-GS24NA, page p. 4 (Drain Hose Flexible Mini-Split Drain Hose DRX-16)
Find this model's filterReplacement Parts & Filters

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
18 A[1]
Breaker needed
not published
Maximum breaker size
not published
Maximum fuse size
20 A[1]
Maximum cooling current
not published
Maximum heating current
not published
Manufacturer wire notes
14 AWG indoor-outdoor[1]

Installation considerations

Show
Liquid line
1/4 in[1]
Suction line
5/8 in[1]
Line connection type
not published
Precharged length
25 ft[1]
Included line-set length
Mitsubishi submittals publish line-size and maximum/precharged piping data; the installer supplies the line set.
Maximum line-set length
100 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
43-5/16 x 9-3/8 x 12-13/16 in[1]
Outdoor dimensions
33-1/16 x 13 x 34-5/8 in[1]
Indoor weight
37 lb[1]
Outdoor weight
120 lb[1]
Drain size
5/8 in[1]

Related systems and guides

Frequently asked questions

Can I install the Mitsubishi Electric M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ) myself, or do I need a pro?
Mitsubishi Electric M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ) 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 M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ) keep heating in a cold winter?
The AHRI/ENERGY STAR certification lists 21,200 BTU/h of heating capacity at 5F. Rated heating operation extends down to -13 F. Certified heating efficiency is 9 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 M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ) need?
Published electrical requirements: 208/230V voltage, 18 A minimum circuit ampacity, and 20 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 100 ft. The outdoor unit's factory charge covers up to 25 ft of line; longer runs need added refrigerant. Measure the planned routing before ordering.
What warranty does the Mitsubishi Electric M-Series GS Hyper-Heat 24,000 BTU R-410A 208/230V (MSZ-GS24NA / MUZ-GS24NAHZ) carry?
The manufacturer publishes these warranty tiers: Base: 5 yr parts / 7 yr compressor (licensed HVAC contractor installation); Registered: 10 yr parts / 10 yr compressor (owner-occupied residence registered within 90 days of installation); Program: 12 yr parts / 12 yr compressor (owner-occupied residence installed and registered by a Diamond Contractor within 90 days). Score uses Registered. Additional published terms are shown for reference and not counted in the score.. 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: MSZ-GS24NA & MUZ-GS24NAHZ Mitsubishi Electric M-Series GS submittalSourced - manufacturer technical document

    Covers Frequency, electrical_spec.guaranteed_voltage_range, electrical_spec.indoor_mca_amps, Maximum fuse size, Minimum circuit ampacity, Phase and more

  2. Air-Conditioning, Heating, and Refrigeration Institute: AHRI public detail 207679256 for MSZ-GS24NA / MUZ-GS24NAHZSourced - AHRI directory

    Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, COP at 5F, EER2, Energy Star status and more

  3. Northeast Energy Efficiency Partnerships: NEEP ccASHP Product List record 438519Sourced - primary source

    Covers Maximum heating capacity at low temperature, Low-temperature heating capacity test point

  4. Mitsubishi Electric Trane HVAC US LLC: MitsubishiPro product record MUZ-GS24NAHZ-U1Sourced - manufacturer product page

    Covers system.lifecycle_status

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

    Covers Additional published compressor warranty, Additional published warranty conditions, Additional published parts warranty, Legacy compressor warranty value, Legacy warranty value, Registered compressor warranty and more

Last updated

Jul 23, 2026