Mitsubishi MXZ-2D20NLHZ 20,000 BTU 2-Zone Hyper-Heat (2 x MSZ-FX09NL) vs Fujitsu AOUH18KWAS2 18,000 BTU 2-Zone (2 x ASUH09KPAS)
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Quick take: The Fujitsu AOUH18KWAS2 18,000 BTU 2-Zone (2 x ASUH09KPAS) costs $1,531 less; the Mitsubishi MXZ-2D20NLHZ 20,000 BTU 2-Zone Hyper-Heat (2 x MSZ-FX09NL) is genuine cold-climate hardware (rated to -22°F) while the Fujitsu AOUH18KWAS2 is better kept to milder winters; the Fujitsu AOUH18KWAS2 is the more efficient unit (22 SEER2); the Mitsubishi MXZ-2D20NLHZ moves more air (20k BTU).
| Spec | Mitsubishi MXZ-2D20NLHZ 20,000 BTU 2-Zone Hyper-Heat (2 x MSZ-FX09NL) | Fujitsu AOUH18KWAS2 18,000 BTU 2-Zone (2 x ASUH09KPAS) |
|---|---|---|
| Price | ~$5,518 | ~$3,987 |
| Type | Multi-Zone | Multi-Zone |
| Capacity | 20k BTU | 18k BTU |
| Coverage | ~900 sq ft | ~700 sq ft |
| SEER2 (cooling) | 19.3 | 22 |
| HSPF2 (heating) | 10 | 10.5 |
| Low-Ambient Heating | to -22°F | to 5°F |
| Max heat at 5°F (NEEP) | 22,000 BTU | 17,000 BTU |
| Heat kept at 5°F | 100% of rated | 77% of rated |
| Refrigerant | R-454B | R-32 |
| Zones | 2 zones | 2 zones |
| Voltage | 208/230V | 208/230V |
| WiFi Control | Built-in | Optional / none |
| Install | Licensed-contractor install, and Mitsubishi's longer warranty terms assume one. The condenser supports two indoor units with up to 164 ft of total piping, 82 ft on a single run and a 49 ft height difference, and ships precharged with R-454B. Price here is the condenser plus two 9k MSZ-FX09NL heads; line sets, disconnect and labor are extra. | Professional install. Fujitsu's 10-year registered term needs a licensed contractor and registration within 60 days, and units bought online are excluded from the warranty. Price is the R-32 outdoor unit plus two 9k ASUH09KPAS wall heads; line sets and labor are extra. |
| Warranty | 5-year parts / 7-year compressor standard; 10 years parts and compressor with online registration after a licensed-contractor install. | 5-year parts / 7-year compressor standard; 10 years parts and compressor with a licensed-contractor install registered within 60 days; 12 years via a Fujitsu Elite Contractor. Equipment bought online or on closeout is excluded. |
Pros & cons
Mitsubishi MXZ-2D20NLHZ 20,000 BTU 2-Zone Hyper-Heat (2 x MSZ-FX09NL)
- ✓NEEP lists 22,000 BTU/h at 5°F, matching its 47°F rating, with an Energy Star cold-climate listing
- ✓19,200 BTU/h still available at -13°F per the spec sheet
- ✓10-year parts and compressor term with registered contractor install
- ✓Takes a range of M-Series wall, floor and cassette heads, not just the FX wall unit
- ✓Precharged for 164 ft total piping, with 82 ft per run
- ✗About $5,500 for the condenser and two 9k heads, with line sets and labor still to add
- ✗Two separate FX09 single-zone systems cost about the same and do not share a compressor
- ✗Warranty past 5/7 years depends on a licensed install and registration
Fujitsu AOUH18KWAS2 18,000 BTU 2-Zone (2 x ASUH09KPAS)
- ✓NEEP lists 17,000 BTU/h at 5°F, about 77% of rated heat
- ✓22.0 SEER2 / 10.5 HSPF2 with wall-type heads
- ✓Accepts wall, slim-duct, mid-static duct and cassette heads on the same condenser
- ✗Heating operation is rated from 5°F up only
- ✗Wi-Fi on the ASUH09KPAS head needs an optional adapter
- ✗Fujitsu excludes equipment bought online from its warranty