Mitsubishi MLZ-KX12NL One-Way Cassette 12,000 BTU vs Fujitsu ACUH12KUAS Compact Cassette 12,000 BTU
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Quick take: The Fujitsu ACUH12KUAS Compact Cassette 12,000 BTU costs $398 less; the Fujitsu ACUH12KUAS Compact Cassette is the more efficient unit (23.7 SEER2).
| Spec | Mitsubishi MLZ-KX12NL One-Way Cassette 12,000 BTU | Fujitsu ACUH12KUAS Compact Cassette 12,000 BTU |
|---|---|---|
| Price | ~$3,484 | ~$3,086 |
| Type | Ceiling Cassette | Ceiling Cassette |
| Capacity | 12k BTU | 12k BTU |
| Coverage | ~500 sq ft | ~500 sq ft |
| SEER2 (cooling) | 20.7 | 23.7 |
| HSPF2 (heating) | 10 | 11.5 |
| Low-Ambient Heating | to -4°F | to -5°F |
| Max heat at 5°F (NEEP) | 7,700 BTU | 15,500 BTU |
| Heat kept at 5°F | 53% of rated | 97% of rated |
| Refrigerant | R-454B | R-32 |
| Zones | Single zone | Single zone |
| Voltage | 208/230V | 208/230V |
| WiFi Control | Built-in | Optional / none |
| Install | Licensed-contractor install. The 10-year parts and compressor term depends on one plus online registration, so a self-install forfeits it. The cassette needs a framed opening between joists and a condensate path, and the MLP-449WU grille is part of the system. R-454B is a mildly flammable refrigerant, so use an installer certified for it. | Licensed-contractor install: Fujitsu's 10- and 12-year terms depend on a licensed or Elite contractor plus online registration. The cassette is 22-7/16 inches square, which fits between 24 inch grid tiles. Lineset is 1/4 x 3/8 inch to 98 ft. |
| Warranty | 5-year parts / 7-year compressor standard; 10 years parts and compressor when installed by a licensed contractor and registered online. | 7-year compressor / 5-year parts standard; 10 years parts and compressor when a licensed contractor installs it and the system is registered online within 60 days, 12 years through a Fujitsu Elite contractor. |
Pros & cons
Mitsubishi MLZ-KX12NL One-Way Cassette 12,000 BTU
- ✓One-way airflow suits narrow rooms and hallways better than a four-way cassette
- ✓20.7 SEER2 and 10 HSPF2 for a cassette
- ✓10-year parts and compressor with contractor install and registration
- ✗About $3,500 for the system before labor, well above the Fujitsu compact cassette
- ✗Grille is a separate part number; confirm it is in the quote
- ✗Needs a contractor to keep the long warranty
- ✗Standard condenser heats less in deep cold than the HZ pairing, which costs more
Fujitsu ACUH12KUAS Compact Cassette 12,000 BTU
- ✓23.7 SEER2 and 11.5 HSPF2, the best ratings of any cassette in this catalog
- ✓Fits a 24 inch ceiling grid
- ✓Grille included
- ✓Lineset run up to 98 ft
- ✗Wi-Fi is an optional accessory, not built in
- ✗Minimum heating around -5°F, not a deep-cold unit
- ✗Four-way discharge is wasted in a narrow room
- ✗The 10- and 12-year terms need a licensed or Elite contractor, so a self-install keeps only the 5/7-year base