Mitsubishi MSZ-GX18NL Hyper-Heat 18,000 BTU vs Daikin Atmosphera 18,000 BTU
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Quick take: The Mitsubishi MSZ-GX18NL Hyper-Heat 18,000 BTU costs $647 less; the Daikin Atmosphera 18,000 BTU is the more efficient unit (22.7 SEER2).
| Spec | Mitsubishi MSZ-GX18NL Hyper-Heat 18,000 BTU | Daikin Atmosphera 18,000 BTU |
|---|---|---|
| Price | ~$3,880 | ~$4,527 |
| Type | Single-Zone | Single-Zone |
| Capacity | 18k BTU | 18k BTU |
| Coverage | ~750 sq ft | ~800 sq ft |
| SEER2 (cooling) | 22.5 | 22.7 |
| HSPF2 (heating) | 10 | 10 |
| Low-Ambient Heating | to -22°F | to -13°F |
| Max heat at 5°F (NEEP) | 19,000 BTU | 21,600 BTU |
| Heat kept at 5°F | 100% of rated | 100% of rated |
| Refrigerant | R-454B | R-32 |
| Zones | Single zone | Single zone |
| Voltage | 208/230V | 208/230V |
| WiFi Control | Built-in | Built-in |
| Install | Licensed-contractor install. Mitsubishi's 10-year parts and compressor term applies only when a licensed contractor installs the system and it is registered online; otherwise it is 5 years parts and 7 years compressor. Lineset is 1/4" x 1/2" flare. R-454B is a mildly flammable (A2L) refrigerant, so hire someone trained and equipped for it. | Daikin's 12-year parts term requires online registration, and the retailer listing ties extended coverage to professional installation, so treat this as a licensed-installer system. Lineset is 1/4" x 1/2", precharged to 49 ft. R-32 is a mildly flammable (A2L) refrigerant, so use an installer trained for it. Breaker size is 18.8A minimum, 20A maximum. |
| Warranty | 5-year parts / 7-year compressor standard; 10 years parts and compressor when installed by a licensed contractor and registered online. | 12-year limited parts warranty with online registration; extended labor coverage is listed by retailers for registered installs (confirm the terms with your contractor). |
Pros & cons
Mitsubishi MSZ-GX18NL Hyper-Heat 18,000 BTU
- ✓Guaranteed heating to -22°F with the HZ outdoor unit
- ✓Strong installer and parts network in most metro areas
- ✓Covers up to about 750 sq ft per retailer data
- ✗About $3,900 for equipment alone
- ✗10 HSPF2 is modest for the price
- ✗Non-HZ MUZ-GX18NL variant is also sold; it is not the cold-climate unit
- ✗Registered 10-year warranty requires a licensed contractor
Daikin Atmosphera 18,000 BTU
- ✓Indoor sound range 23 to 45 dB(A) per the retailer
- ✓12-year parts warranty with registration
- ✓Head can be reused when planning multi-zone expansion
- ✗$4,300 to $4,500 for equipment alone, above the Mitsubishi GX18 and Fujitsu 18k
- ✗10.0 HSPF2 is ordinary for the price
- ✗Parts-only coverage