# Mitsubishi Electric EX 18,000 BTU wall mount system

> Mitsubishi Electric EX 18,000 BTU wall mount system (SUZ-AA18NL / MSZ-EX18NLW) is a 18,000 BTU system from Mitsubishi Electric EX. It has a wall mount indoor unit, runs on 208/230V, is rated 17.5 SEER2, has an HSPF2 of 10.6, puts out 10,600 BTU/h of heat at 5 °F, uses R-454B refrigerant, and carries a 10-year compressor warranty. Lowest in-stock price on file: $3,922.40 at Got Ductless (checked Oct 14, 2026).

- Line: [Mitsubishi Electric EX](https://minisplitfacts.com/lines/mitsubishi-ex/)
- Category: [Single-zone systems](https://minisplitfacts.com/compare/single-zone/)
- Size tier within its line: 18k
- Status: current
- Data confidence: confirmed (last verified 2026-10-14; [what this means](https://minisplitfacts.com/how-we-compare/#confidence))
- Page: https://minisplitfacts.com/products/mitsubishi-ex-18k-wall/

## Specifications

| Spec | Value | Source |
|---|---|---|
| Model number | SUZ-AA18NL / MSZ-EX18NLW | [hvacdirect.com](https://hvacdirect.com/18000-btu-mitsubishi-ex-series-17-5-seer2-single-wall-mounted-mini-split-heat-pump-system-r454b-suz-aa18nl-msz-ex18nlw-199103.html) (retailer, page, 2026-10-14) |
| Size | 18,000 BTU/h | [hvacdirect.com](https://hvacdirect.com/18000-btu-mitsubishi-ex-series-17-5-seer2-single-wall-mounted-mini-split-heat-pump-system-r454b-suz-aa18nl-msz-ex18nlw-199103.html) (retailer, page, 2026-10-14) |
| Indoor unit style | Wall mount | [hvacdirect.com](https://hvacdirect.com/18000-btu-mitsubishi-ex-series-17-5-seer2-single-wall-mounted-mini-split-heat-pump-system-r454b-suz-aa18nl-msz-ex18nlw-199103.html) (retailer, page, 2026-10-14) |
| Voltage | 208/230V | [hvacdirect.com](https://hvacdirect.com/18000-btu-mitsubishi-ex-series-17-5-seer2-single-wall-mounted-mini-split-heat-pump-system-r454b-suz-aa18nl-msz-ex18nlw-199103.html) (retailer, page, 2026-10-14) |
| Outdoor unit model | SUZ-AA18NL | [hvacdirect.com](https://hvacdirect.com/18000-btu-mitsubishi-ex-series-17-5-seer2-single-wall-mounted-mini-split-heat-pump-system-r454b-suz-aa18nl-msz-ex18nlw-199103.html) (retailer, page, 2026-10-14) |
| Indoor unit model | MSZ-EX18NLW | [hvacdirect.com](https://hvacdirect.com/18000-btu-mitsubishi-ex-series-17-5-seer2-single-wall-mounted-mini-split-heat-pump-system-r454b-suz-aa18nl-msz-ex18nlw-199103.html) (retailer, page, 2026-10-14) |
| SEER2 (cooling efficiency) | 17.5 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3995902) (certification, feed, 2026-10-14) |
| EER2 (efficiency at 95 °F) | 11.7 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3995902) (certification, feed, 2026-10-14) |
| HSPF2 (heating efficiency) | 10.6 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3995902) (certification, feed, 2026-10-14) |
| Rated cooling capacity | 16,400 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3995902) (certification, feed, 2026-10-14) |
| Heating capacity at 47 °F | 20,000 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3995902) (certification, feed, 2026-10-14) |
| Heating capacity at 17 °F | 13,100 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3995902) (certification, feed, 2026-10-14) |
| Heating capacity at 5 °F | 10,600 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3995902) (certification, feed, 2026-10-14) |
| COP at 5 °F | 3 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3995902) (certification, feed, 2026-10-14) |
| Heats down to | not published |  |
| Refrigerant | R-454B | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3995902) (certification, feed, 2026-10-14) |
| ENERGY STAR certified | yes | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3995902) (certification, feed, 2026-10-14) |
| ENERGY STAR cold climate | no | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3995902) (certification, feed, 2026-10-14) |
| Line connection | not published |  |
| Wi-Fi control | not published |  |
| Indoor sound level (quietest) | not published |  |
| Outdoor sound level | 55 dB(A) | [hvacdirect.com](https://hvacdirect.com/18000-btu-mitsubishi-ex-series-17-5-seer2-single-wall-mounted-mini-split-heat-pump-system-r454b-suz-aa18nl-msz-ex18nlw-199103.html) (retailer, page, 2026-10-14) |
| Compressor warranty | 10 years | [dw2p0k56b2hr9.cloudfront.net](https://dw2p0k56b2hr9.cloudfront.net/Residential_M_Series_P_Series_and_SMART_MULTI_Split_Air_Conditioner_and_Heat_Pump_Systems_V3_1b7be81e7d.pdf) (brand, pdf, 2026-10-14) |
| Parts warranty | 10 years | [dw2p0k56b2hr9.cloudfront.net](https://dw2p0k56b2hr9.cloudfront.net/Residential_M_Series_P_Series_and_SMART_MULTI_Split_Air_Conditioner_and_Heat_Pump_Systems_V3_1b7be81e7d.pdf) (brand, pdf, 2026-10-14) |
| Warranty if you install it yourself | Licensed installer required | [mitsubishicomfort.com](https://mitsubishicomfort.com/internet-sales) (brand, page, 2026-10-14) |
| Outdoor unit size (W×D×H) | 33.06 × 13 × 34.63 in | [hvacdirect.com](https://hvacdirect.com/18000-btu-mitsubishi-ex-series-17-5-seer2-single-wall-mounted-mini-split-heat-pump-system-r454b-suz-aa18nl-msz-ex18nlw-199103.html) (retailer, page, 2026-10-14) |
| Indoor unit size (W×D×H) | 34.81 × 7.69 × 11.75 in | [hvacdirect.com](https://hvacdirect.com/18000-btu-mitsubishi-ex-series-17-5-seer2-single-wall-mounted-mini-split-heat-pump-system-r454b-suz-aa18nl-msz-ex18nlw-199103.html) (retailer, page, 2026-10-14) |
| Outdoor unit weight | 115 lb | [hvacdirect.com](https://hvacdirect.com/18000-btu-mitsubishi-ex-series-17-5-seer2-single-wall-mounted-mini-split-heat-pump-system-r454b-suz-aa18nl-msz-ex18nlw-199103.html) (retailer, page, 2026-10-14) |

## Where to buy

| Store | Price (USD) | Availability | Checked | Link |
|---|---|---|---|---|
| Got Ductless | $3,922.40 | in stock | 2026-10-14 | [View at Got Ductless](https://gotductless.com/products/mitsubishi-msz-ex18nlw-suz-aa18nl-18-000-btu-17-5-seer2-wall-mounted-heat-pump-system) |
| HVACDirect | $4,273.69 | in stock | 2026-10-14 | [View at HVACDirect](https://hvacdirect.com/18000-btu-mitsubishi-ex-series-17-5-seer2-single-wall-mounted-mini-split-heat-pump-system-r454b-suz-aa18nl-msz-ex18nlw-199103.html) |

Prices are re-checked weekly; a date more than a month old means the store could not be re-read.

## The equivalent in other lines

Same category, same size tier (18k), different line:

- [ACiQ Extreme 18,000 BTU ceiling cassette system](https://minisplitfacts.com/products/aciq-extreme-18k-cassette/) — $2,249.99
- [ACiQ Extreme 18,000 BTU slim ceiling cassette system](https://minisplitfacts.com/products/aciq-extreme-18k-cassette-slim/) — $2,429.99
- [ACiQ Extreme 18,000 BTU floor console system](https://minisplitfacts.com/products/aciq-extreme-18k-console/) — $2,393.99
- [ACiQ Extreme 18,000 BTU concealed duct system](https://minisplitfacts.com/products/aciq-extreme-18k-duct/) — $2,349.99
- [ACiQ Extreme 18,000 BTU wall mount system](https://minisplitfacts.com/products/aciq-extreme-18k-wall/) — $1,899.99
- [ACiQ Standard 18,000 BTU ceiling cassette system](https://minisplitfacts.com/products/aciq-standard-18k-cassette/) — $1,944.99
- [ACiQ Standard 18,000 BTU slim ceiling cassette system](https://minisplitfacts.com/products/aciq-standard-18k-cassette-slim/) — $2,124.99
- [ACiQ Standard 18,000 BTU floor console system](https://minisplitfacts.com/products/aciq-standard-18k-console/) — $2,088.99


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MiniSplit Facts lists modular tool storage from every brand side by side, with a source for every spec. [How we compare](https://minisplitfacts.com/how-we-compare/). Data as of 2026-10-14.