SplitAtlas

Mitsubishi Electric / M-Series GS

Mitsubishi M-Series GS 15k HZ R-410A 208/230V Mini-Split

Certified capacity
14,000 BTU/h[2]
SEER2
21 SEER2[2]
Heating floor
-13 F[1]
Voltage
208/230V[1]
Install path
Professional install

This is the Hyper-Heat (HZ) version of the discontinued GS 15k - the same SEER2 21 / EER2 12.75 platform re-tuned to hold a flat 14,000 BTU of heat from 47F down to 5F for cold-climate use. It is R-410A and Production Stopped; the current cold-climate equivalent is the R-454B GX 15k Hyper-Heat.

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Mitsubishi Electric M-Series GS Hyper-Heat 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NAHZ)

Image: Mitsubishi Electric

Data completeness: 95%
Last sourced
Jul 23, 2026

SplitAtlas score

8.6 / 10

Methodology
Cooling efficiencyBelow average

(21.0 SEER2) among 12k systems

Heating efficiencyAbove average

(9.4 HSPF2) among 12k systems

Cold-weather performanceTop 10%

(5F certified capacity: 100% of the 47F rating; -13 F heating floor) among 12k 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

14,000BTU/h[2]

Rated heating

14,000BTU/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 10 A; breaker/fuse 15 A.
  • Line set: connection type not sourced; precharged 25 ft; max 65 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 14,000 BTU of heat down to 5F - genuine deep-cold operation.
  • SEER2 21 with Mitsubishi dealer support and reliability reputation.

Weaknesses

  • Production Stopped and R-410A - phase-out refrigerant.
  • HSPF2 9.4 - lower mild-weather seasonal heating than the standard GS 15k.
  • The current GX 15k Hyper-Heat (R-454B) is the recommended replacement.

Climate suitability

Minimum heating ambient
-13 F[1]
Heating capacity at −13°F
9,820 BTU/h[3]
Certified heating at 5F
14,000 BTU/h[2]
Maximum heating at 5F (manufacturer)
14,000 BTU/h[1]
Rated heating at 17F
8,700 BTU/h[2]
Rated heating at 47F
14,000 BTU/h[2]

Specifications

Show
Manufacturer
Mitsubishi Electric
Brand
Mitsubishi Electric
Product line
M-Series GS
Model number
MSZ-GS15NA-U1 indoor / MUZ-GS15NAHZ-U1 outdoor
Indoor unit model
MSZ-GS15NA-U1
Outdoor unit model
MUZ-GS15NAHZ-U1
Number of zones
1
Max indoor units
not published
Rated cooling capacity
14,000 BTU/h[2]
Rated heating capacity
14,000 BTU/h[2]
Voltage
208/230V[1]
MCA
10 A[1]
Maximum fuse or breaker size
15 A[1]
Breaker needed
not published
SEER2
21 SEER2[2]
EER2
12.75 EER2[2]
HSPF2 (Region 4)
9.4 HSPF2[2]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
3.6 COP[1]
COP at 5F
1.91 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
51 dBA[1]
Indoor weight
23 lb[1]
Outdoor weight
85 lb[1]
Refrigerant
R-410A[2]
Refrigerant charge
41 oz[1]
Manufacturer coverage
not published
Line-set size
1/4 in liquid / 1/2 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
65 ft[1]
Max line set per indoor
not published
Maximum elevation difference
40 ft[1]
Max height between indoor units
not published
Wi-Fi support
supported[1]
Energy Star status
ENERGY STAR certified[2]
AHRI certification number
207679254[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 207679254, AHRI public detail 207679254, ENERGY STAR exact row for AHRI 207679254, M-Series GS Hyper-Heat Mitsubishi Comfort product page, M-Series GS Hyper-Heat Mitsubishi Comfort product page, MitsubishiPro product record MUZ-GS15NAHZ-U1, MSZ-GS15NA & MUZ-GS15NAHZ Mitsubishi Electric submittal, METUS Residential M-Series, P-Series and SMART MULTI Limited Warranty Statement
Specification sheet
MSZ-GS15NA & MUZ-GS15NAHZ Mitsubishi Electric submittal
Last sourced date
Jul 23, 2026

Parts and filters

Fits Mitsubishi Electric M-Series GS Hyper-Heat 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NAHZ). Part numbers and fit notes identify compatibility only; no manufacturer endorsement is implied.

filter-anti-allergy

Mitsubishi anti-allergy enzyme filter

Fits
Mitsubishi Electric M-Series GS Hyper-Heat 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NAHZ)
OEM part number
MAC-408FT-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-GS15NA / MUZ-GS15NAHZ. Manufacturer documentation publishes this OEM part number for this model family. No live HVACDirect exact-part offer was found. Amazon lists this exact OEM part, sold by My Filter Company.
Source
Mitsubishi Electric MSZ-GS15NA / MUZ-GS15NAHZ Submittal, INDOOR UNIT ACCESSORIES: MSZ-GS15NA, page p. 4 (Filter Anti-allergy Enzyme Filter MAC-408FT-E)

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Paid link

Check price on Amazon

smart-controller-module

Mitsubishi Wireless Interface for kumo cloud

Fits
Mitsubishi Electric M-Series GS Hyper-Heat 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NAHZ)
OEM part number
PAC-USWHS002-WF-2
Fit note
Fits MSZ-GS15NA / MUZ-GS15NAHZ. 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-GS15NA / MUZ-GS15NAHZ Submittal, INDOOR UNIT ACCESSORIES: MSZ-GS15NA, 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 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NAHZ)
OEM part number
MAC-334IF-E
Fit note
Fits MSZ-GS15NA / MUZ-GS15NAHZ. 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-GS15NA / MUZ-GS15NAHZ Submittal, INDOOR UNIT ACCESSORIES: MSZ-GS15NA, 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 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NAHZ)
OEM part number
MHK2
Fit note
Fits MSZ-GS15NA / MUZ-GS15NAHZ. 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-GS15NA / MUZ-GS15NAHZ Submittal, INDOOR UNIT ACCESSORIES: MSZ-GS15NA, page p. 4 (kumo touch™ RedLINK™ Wireless Controller & Receiver kit MHK2)

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Paid link

Check price at HVACDirect
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
10 A[1]
Breaker needed
not published
Maximum breaker size
not published
Maximum fuse size
15 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
1/2 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
65 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
31-7/16 x 9-1/8 x 11-5/8 in[1]
Outdoor dimensions
31-1/2 x 11-1/4 x 21-5/8 in[1]
Indoor weight
23 lb[1]
Outdoor weight
85 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 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NAHZ) myself, or do I need a pro?
Mitsubishi Electric M-Series GS Hyper-Heat 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NAHZ) 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 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NAHZ) keep heating in a cold winter?
The AHRI/ENERGY STAR certification lists 14,000 BTU/h of heating capacity at 5F. Rated heating operation extends down to -13 F. Certified heating efficiency is 9.4 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 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NAHZ) need?
Published electrical requirements: 208/230V voltage, 10 A minimum circuit ampacity, and 15 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 65 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 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NAHZ) 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-GS15NA & MUZ-GS15NAHZ 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 207679254 for MSZ-GS15NA / MUZ-GS15NAHZSourced - 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 438521Sourced - 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-GS15NAHZ-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