Gree Vireo R-32 24,000 BTU vs Pioneer Diamante Pro 24,000 BTU
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Quick take: The Pioneer Diamante Pro 24,000 BTU costs $752 less; the Gree Vireo R-32 24,000 BTU is the more efficient unit (26 SEER2).
| Spec | Gree Vireo R-32 24,000 BTU | Pioneer Diamante Pro 24,000 BTU |
|---|---|---|
| Price | ~$2,240 | ~$1,488 |
| Type | Single-Zone | Single-Zone |
| Capacity | 24k BTU | 24k BTU |
| Coverage | ~1,100 sq ft | ~1,000 sq ft |
| SEER2 (cooling) | 26 | 21 |
| HSPF2 (heating) | 10 | 9.5 |
| Low-Ambient Heating | to -22°F | to -4°F |
| Max heat at 5°F (NEEP) | 19,000 BTU | 16,400 BTU |
| Heat kept at 5°F | 79% of rated | 68% of rated |
| Refrigerant | R-32 | R-454B |
| Zones | Single zone | Single zone |
| Voltage | 230V | 230V |
| WiFi Control | Built-in | Optional / none |
| Install | Gree sells through HVAC distributors and routes buyers to a GREE Select contractor; the flared lineset (up to 131 ft) needs nitrogen testing and evacuation, and R-32 is a mildly flammable A2L refrigerant, so choose an installer certified for it. Wi-Fi is built into the head at the factory. The outdoor unit is rated MCA 22 A / MOCP 30 A and the lineset is 1/4 in. liquid by 5/8 in. gas. | Two-ton single-zone install with a 1/2 in. gas and 1/4 in. liquid lineset; the outdoor unit wants a 25A double-pole breaker. Pioneer's warranty terms depend on registering within 90 days, and the flare connections should be nitrogen-tested and evacuated by an HVAC tech rather than rushed on a weekend. |
| Warranty | 5 years parts / 7 years compressor, residential and commercial (Gree brochure). | Up to 5 years parts and up to 5 years compressor with registration within 90 days of purchase. |
Pros & cons
Gree Vireo R-32 24,000 BTU
- ✓Rated 20,000 BTU/h at 17°F with a 19,000 BTU/h maximum at 5°F
- ✓26.0 SEER2 / 10.0 HSPF2 at 24k is strong
- ✓7-year compressor warranty
- ✗Not Energy Star Cold Climate designated; only Energy Star South
- ✗Cooling is rated at 22,000 BTU/h, below the 24,000 on the label
- ✗MOCP 30 A, so a 20 A circuit will not do
Pioneer Diamante Pro 24,000 BTU
- ✓21.0 SEER2 / 9.5 HSPF2 at 2 tons is stronger than most budget 24k units
- ✓Heating capacity range tops out at 25,900 BTU/h, above the 24,000 nameplate
- ✓COP2 of 2.1 at 5°F is a published number, not a marketing claim
- ✓Pre-packed 16 ft kit and a long list of downloadable documents on the product page
- ✗Wi-Fi is an optional add-on module, not included
- ✗Heating is rated to -4°F only, with no hyper-heat capacity table below that
- ✗Indoor unit is long (46-7/8 in.), so check wall width before ordering
- ✗Outdoor unit weighs 88 lb net, which means a two-person lift onto a bracket or pad