# Daikin Oterra 18,000 BTU wall mount system

> Daikin Oterra 18,000 BTU wall mount system (RXF18AXVJU / FTXF18AXVJU) is a 18,000 BTU system from Daikin Oterra. It has a wall mount indoor unit, runs on 208/230V, is rated 21 SEER2, has an HSPF2 of 9.6, puts out 10,700 BTU/h of heat at 5 °F, and uses R-32 refrigerant. Lowest in-stock price on file: $2,255 at HVACDirect (checked Oct 14, 2026).

- Line: [Daikin Oterra](https://minisplitfacts.com/lines/daikin-oterra/)
- 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/daikin-oterra-18k-wall/

## Specifications

| Spec | Value | Source |
|---|---|---|
| Model number | RXF18AXVJU / FTXF18AXVJU | [hvacdirect.com](https://hvacdirect.com/18-000-btu-daikin-oterra-21-seer2-single-zone-wall-mount-mini-split-heat-pump-system-r32-230v-194693.html) (retailer, page, 2026-10-14) |
| Size | 18,000 BTU/h | [hvacdirect.com](https://hvacdirect.com/18-000-btu-daikin-oterra-21-seer2-single-zone-wall-mount-mini-split-heat-pump-system-r32-230v-194693.html) (retailer, page, 2026-10-14) |
| Indoor unit style | Wall mount | [hvacdirect.com](https://hvacdirect.com/18-000-btu-daikin-oterra-21-seer2-single-zone-wall-mount-mini-split-heat-pump-system-r32-230v-194693.html) (retailer, page, 2026-10-14) |
| Voltage | 208/230V | [hvacdirect.com](https://hvacdirect.com/18-000-btu-daikin-oterra-21-seer2-single-zone-wall-mount-mini-split-heat-pump-system-r32-230v-194693.html) (retailer, page, 2026-10-14) |
| Outdoor unit model | RXF18AXVJU | [hvacdirect.com](https://hvacdirect.com/18-000-btu-daikin-oterra-21-seer2-single-zone-wall-mount-mini-split-heat-pump-system-r32-230v-194693.html) (retailer, page, 2026-10-14) |
| Indoor unit model | FTXF18AXVJU | [hvacdirect.com](https://hvacdirect.com/18-000-btu-daikin-oterra-21-seer2-single-zone-wall-mount-mini-split-heat-pump-system-r32-230v-194693.html) (retailer, page, 2026-10-14) |
| SEER2 (cooling efficiency) | 21 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3361210) (certification, feed, 2026-10-14) |
| EER2 (efficiency at 95 °F) | 12 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3361210) (certification, feed, 2026-10-14) |
| HSPF2 (heating efficiency) | 9.6 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3361210) (certification, feed, 2026-10-14) |
| Rated cooling capacity | 18,100 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3361210) (certification, feed, 2026-10-14) |
| Heating capacity at 47 °F | 21,600 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3361210) (certification, feed, 2026-10-14) |
| Heating capacity at 17 °F | 12,800 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3361210) (certification, feed, 2026-10-14) |
| Heating capacity at 5 °F | 10,700 BTU/h | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3361210) (certification, feed, 2026-10-14) |
| COP at 5 °F | 2.1 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3361210) (certification, feed, 2026-10-14) |
| Heats down to | not published |  |
| Refrigerant | R-32 | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3361210) (certification, feed, 2026-10-14) |
| ENERGY STAR certified | yes | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3361210) (certification, feed, 2026-10-14) |
| ENERGY STAR cold climate | no | [energystar.gov](https://www.energystar.gov/productfinder/product/certified-heat-pumps/details/3361210) (certification, feed, 2026-10-14) |
| Line connection | not published |  |
| Wi-Fi control | not published |  |
| Indoor sound level (quietest) | not published |  |
| Outdoor sound level | 54 dB(A) | [hvacdirect.com](https://hvacdirect.com/18-000-btu-daikin-oterra-21-seer2-single-zone-wall-mount-mini-split-heat-pump-system-r32-230v-194693.html) (retailer, page, 2026-10-14) |
| Compressor warranty | not published |  |
| Parts warranty | 12 years | [daikincomfort.com](https://daikincomfort.com/docs/default-source/general/warranty-certificates/wc-pwddmstwzt.pdf) (brand, pdf, 2026-10-14) |
| Warranty if you install it yourself | Licensed installer required | [daikincomfort.com](https://daikincomfort.com/my-daikin-systems/standard-warranty-information) (brand, page, 2026-10-14) |
| Outdoor unit size (W×D×H) | 42.37 × 18.87 × 29.87 in | [hvacdirect.com](https://hvacdirect.com/18-000-btu-daikin-oterra-21-seer2-single-zone-wall-mount-mini-split-heat-pump-system-r32-230v-194693.html) (retailer, page, 2026-10-14) |
| Indoor unit size (W×D×H) | 39.56 × 10.75 × 11.68 in | [hvacdirect.com](https://hvacdirect.com/18-000-btu-daikin-oterra-21-seer2-single-zone-wall-mount-mini-split-heat-pump-system-r32-230v-194693.html) (retailer, page, 2026-10-14) |
| Outdoor unit weight | 101 lb | [hvacdirect.com](https://hvacdirect.com/18-000-btu-daikin-oterra-21-seer2-single-zone-wall-mount-mini-split-heat-pump-system-r32-230v-194693.html) (retailer, page, 2026-10-14) |

## Where to buy

| Store | Price (USD) | Availability | Checked | Link |
|---|---|---|---|---|
| HVACDirect | $2,255 | in stock | 2026-10-14 | [View at HVACDirect](https://hvacdirect.com/18-000-btu-daikin-oterra-21-seer2-single-zone-wall-mount-mini-split-heat-pump-system-r32-230v-194693.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.