Mitsubishi Electric / M-Series EX Designer Hyper-Heat
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ)
Model data is drawn from manufacturer, retailer, and certification sources. Missing specifications remain marked as not published.
1 zoneProfessional installProfessional installCurrent
Get installation quotes
Free and no obligation. Takes about a minute.
Data completeness: 90%
- Last verified
- Jul 23, 2026
SplitAtlas score
7.6 / 10
Cooling efficiency0.0
Heating efficiency39.0
Cold-weather performance100.0
Noise13.9
Warranty5.0
Feature set0.0
Documentation & parts50.0
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
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) review summary
The EX 15k Hyper-Heat takes the designer line to 1.25 tons of cold-climate duty, holding 17,000 BTU from 47F down to 5F. As with the other HZ EX models, cooling efficiency (SEER2 17.5) is modest because the system is tuned for heating - the appeal is deep-cold performance behind a flat-panel head.
Rated cooling
15,000BTU/hVerified - AHRI directory
Rated heating
17,000BTU/hVerified - AHRI directory
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) best-fit use cases
A larger visible room in a cold climate where the designer look and sub-zero heating both matter.
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) specifications
- Manufacturer
- Mitsubishi Electric
- Brand
- Mitsubishi Electric
- Product line
- M-Series EX Designer Hyper-Heat
- Model number
- MSZ-EX15NLW-U1 indoor / SUZ-AA15NLHZ-U1 outdoor
- Indoor unit model
- MSZ-EX15NLW-U1
- Outdoor unit model
- SUZ-AA15NLHZ-U1
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 15,000 BTU/hVerified - AHRI directory
- Rated heating capacity
- 17,000 BTU/hVerified - AHRI directory
- Voltage
- 208/230VVerified - manufacturer product page
- MCA
- 25 AVerified - manufacturer technical document
- Maximum fuse or breaker size
- 42 AVerified - manufacturer technical document
- Breaker needed
- not published
- SEER2
- 17.5 SEER2Verified - AHRI directory
- EER2
- 11.9 EER2Verified - AHRI directory
- HSPF2 (Region 4)
- 9.8 HSPF2Verified - AHRI directory
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- 3.7 COPVerified - manufacturer technical document
- COP at 5F
- 2 COPVerified - AHRI directory
- Minimum outdoor heating temperature
- -22 FVerified - manufacturer product page
- Minimum outdoor cooling temperature
- not published
- Maximum outdoor temperature
- not published
- Indoor noise range
- cooling 28 , 31 , 35 , 39 , 42; heating 28 , 30 , 35 , 41 , 48Verified - manufacturer technical documentmanufacturer published: cooling 28; heating 55 dB(A)
- Outdoor noise rating
- 55 dBAVerified - manufacturer technical document
- Indoor weight
- 26 lbVerified - manufacturer technical documentmanufacturer published: 25.35 lb
- Outdoor weight
- 115 lbVerified - manufacturer technical document
- Refrigerant
- R-454BVerified - AHRI directory
- Refrigerant charge
- not published
- 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
- 100 ftVerified - manufacturer technical document
- Max line set per indoor
- not published
- Maximum elevation difference
- 50 ftVerified - manufacturer technical document
- Max height between indoor units
- not published
- Wi-Fi support
- not published
- Energy Star status
- certifiedVerified - AHRI directory
- AHRI certification number
- 215748513Verified - AHRI directory
- Warranty
- 5 years parts / 7 years compressor. 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.
- DIY installation status
- Professional install
- Retail price
- HVACDirect exact model search returned 403 and no exact product page with visible price was retrieved on 2026-07-23.
- Installation type
- Professional install
- Available retailers
- not published
- Manual links
- AHRI certificate 215748513, AHRI public detail 215748513, ENERGY STAR exact row for AHRI 215748513, M-Series EX Designer Hyper-Heat Mitsubishi Comfort product page, MitsubishiPro product record MSZ-EX15NLW-U1, MitsubishiPro product record SUZ-AA15NLHZ-U1, HVACDirect exact search for MSZ-EX15NLW / SUZ-AA15NLHZ, MSZ-EX15NLW & SUZ-AA15NLHZ Mitsubishi Electric submittal, METUS Residential M-Series, P-Series and SMART MULTI Limited Warranty Statement
- Specification sheet
- MSZ-EX15NLW & SUZ-AA15NLHZ Mitsubishi Electric submittal
- Last verified date
- Jul 23, 2026
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) strengths
- Holds 17,000 BTU of heat down to 5F - reliable deep-cold heating at 1.25 tons.
- Designer flat-panel styling; current R-454B refrigerant.
- Mitsubishi dealer support and reliability reputation.
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) weaknesses
- SEER2 17.5 / HSPF2 9.8 - efficiency is the trade for cold-weather tuning.
- Premium price; professional dealer installation required.
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) climate suitability
- Minimum heating ambient
- -22 FVerified - manufacturer product page
- Rated heating at 5F
- 17,000 BTU/hVerified - AHRI directory
- Rated heating at 17F
- 10,900 BTU/hVerified - AHRI directory
- Rated heating at 47F
- 17,000 BTU/hVerified - AHRI directory
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) electrical requirements
- Voltage
- not published
- Voltage range
- 208/230VVerified - manufacturer product page
- Phase
- 1Verified - manufacturer product page
- Frequency
- 60 HzVerified - manufacturer product page
- MCA
- 25 AVerified - manufacturer technical document
- Breaker needed
- not published
- Maximum breaker size
- not published
- Maximum fuse size
- 42 AVerified - manufacturer technical document
- Maximum cooling current
- not published
- Maximum heating current
- not published
- Manufacturer wire notes
- 14 AWG indoor-outdoorVerified - manufacturer technical document
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) installation considerations
- Liquid line
- 1/4 inVerified - manufacturer technical document
- Suction line
- 1/2 inVerified - manufacturer technical document
- Precharged length
- 25 ftVerified - manufacturer technical document
- 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 ftVerified - manufacturer technical document
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- 34-13/16 x 7-11/16 x 11-3/4 inVerified - manufacturer technical documentmanufacturer published: 34.843 x 7.677 x 11.772 in
- Outdoor dimensions
- 33-1/16 x 13 x 34-5/8 inVerified - manufacturer technical document
- Indoor weight
- 26 lbVerified - manufacturer technical documentmanufacturer published: 25.35 lb
- Outdoor weight
- 115 lbVerified - manufacturer technical document
- Drain size
- 5/8 inVerified - manufacturer technical document
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) related systems and guides
- More Mitsubishi Electric systems
- Mitsubishi Electric M-Series EX Designer 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NL)
- Mitsubishi Electric M-Series FX Deluxe Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-FX15NL / MUZ-FX15NLHZ)
- Mitsubishi Electric M-Series FS 15,000 BTU R-410A 208/230V (MSZ-FS15NA / MUZ-FS15NAH)
- Mitsubishi Electric M-Series GS 15,000 BTU R-410A 208/230V (MSZ-GS15NA / MUZ-GS15NA)
- Buying guide
- Single vs multi-zone
- Cold-weather performance
Frequently asked questions
- Can I install the Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) myself, or do I need a pro?
- Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) 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 EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) keep heating in a cold winter?
- The manufacturer publishes 17,000 BTU/h of heating output at 5F. Rated heating operation extends down to -22 F. Certified heating efficiency is 9.8 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 EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) need?
- Published electrical requirements: 208/230V voltage, 25 A minimum circuit ampacity, and 42 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, and the included line set comes pre-charged for 25 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 M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) carry?
- The manufacturer publishes 5 years parts coverage and 7 years compressor coverage. Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) data sources
- Mitsubishi Electric Trane HVAC US LLC: MitsubishiPro product record SUZ-AA15NLHZ-U1Verified - manufacturer product page
Covers Frequency, Phase, Voltage range, Minimum outdoor heating temperature, system.lifecycle_status
- Mitsubishi Electric Trane HVAC US LLC: MSZ-EX15NLW & SUZ-AA15NLHZ Mitsubishi Electric M-Series EX submittalVerified - manufacturer technical document
Covers electrical_spec.guaranteed_voltage_range, electrical_spec.indoor_mca_amps, Maximum fuse size, Minimum circuit ampacity, Manufacturer wire notes, Drain size and more
- Air-Conditioning, Heating, and Refrigeration Institute: AHRI public detail 215748513 for MSZ-EX15NLW / SUZ-AA15NLHZVerified - AHRI directory
Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Energy Star status, Rated heating capacity and more
- Mitsubishi Electric Trane HVAC US LLC: Residential M-Series, P-Series and SMART MULTI Split Air Conditioner and Heat Pump Systems Limited Warranty StatementVerified - manufacturer technical document
Covers Compressor warranty, Parts warranty, Warranty notes
Mitsubishi Electric M-Series EX Designer Hyper-Heat 15,000 BTU R-454B 208/230V (MSZ-EX15NLW / SUZ-AA15NLHZ) last updated
Jul 23, 2026