Daikin’s entry line, for cooling and mild winters: it stops heating below 5 °F, but keeps Daikin’s 12-year registered warranty.
No store we check sells it online; the maker lists where to buy or who installs it.
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
| Capacity (certified) | |
|---|---|
| Size (nominal) | 18,000 BTU |
| Cooling at 95 °F | 18,000 Btu/h |
| Heating at 47 °F | 21,600 Btu/h |
| Heating at 17 °F (max) | 19,500 Btu/h |
| Heating at 5 °F (max) | 15,200 Btu/h |
| Heat kept at 5 °F | 70% |
| Efficiency (certified) | |
| HSPF2 (Region IV) | 9.6 |
| SEER2 | 21 |
| EER2 | 12 |
| COP at 5 °F | 2.00 |
| ENERGY STAR | ENERGY STAR Cold Climate |
| AHRI certificate | 217005314 |
| Operating range | |
| Heats down to | 5 °F |
| Cooling range | 50 to 122 °F |
| Installation | |
| Installed by | Professional (sold through installers) |
| Line set connection | Flare fittings (vacuum pump needed) |
| Line set | up to 99 ft |
| Voltage | 230 V |
| Refrigerant | R-32 |
| Indoor unit | FTXF18BVJU9 |
| Outdoor unit | RXF18BVJU9 |
| Build | |
| Indoor noise | 33–48 dB(A) |
| Outdoor noise | 54 dB(A) |
| Wi-Fi | Built in |
| Weight | indoor 28 lb / outdoor 113 lb |
| Warranty | 12 yr compressor, 12 yr parts |
The best-value quick-connect line: the same certified system as Pioneer’s Quantum Ultra, close to Della’s Optima, without the vacuum pump, for the same price or a few hundred dollars more.
Amazon $1,679A low price for a self-installer who owns or will rent a vacuum pump. The Klimaire DIY is the same certified system with quick-connect lines, and Della’s Optima has near-identical ratings for less.
Pioneer Mini Split store $1,538Senville’s budget line, for cooling and mild winters: it stops heating below 5 °F, and the 5-year warranty needs a licensed installer.
Senville $999.99Compare the Daikin Oterra 18,000 BTU with any other mini-split →
More from Daikin: every Daikin product ranked.
