3-ton split systems
Rated products: 210 · model numbers: 493 · certified cooling 32,000–38,999 Btu/h
Of the 7 split-system size classes on this site, the 3-ton class has the most rated products and the second-highest median SEER2. The Rheem RP18AZ36AJVC keeps the largest share of its 47°F capacity at 5°F. The Toshiba Carrier MCY-MUB0368HS2P-UL lists the top HSPF2.
What the class is made of
Compressor staging
- variable-speed
- 152
- single-stage
- 27
- two-stage
- 31
Refrigerant
- R-32
- 26
- R-410A
- 59
- R-454B
- 125
Most listed brands: AC PRO (12), American Standard (12), Champion (9), Friedrich (9), Airquest (8), GE (7), 1HVAC (6), and AirEase (6).
Highest in the class, rating by rating
| Rating | Highest | Value | Next value down |
|---|---|---|---|
| Kept at 5°F | Rheem RP18AZ36AJVC (joint, with 1 more) | 121% | Friedrich FRP18AZ36AJVC, 119% |
| Output at 5°F | Trane 5TCV0X48A1 | 45,000 Btu/h | Rheem RP18AZ36AJVC, 43,500 Btu/h |
| COP at 5°F | Johnson Controls XH636E2S11 (joint, with 2 more) | 2.50 | Trane 5TWR6036A1, 2.49 |
| HSPF2 | Toshiba Carrier MCY-MUB0368HS2P-UL | 12.2 | Hisense AOH-36U3T24P, 10.5 |
| SEER2 | Toshiba Carrier MCY-MUB0368HS2P-UL | 29.7 | LG KUSXA361A, 23.5 |
| EER2 | Toshiba Carrier MCY-MUB0368HS2P-UL | 17.2 | AC PRO 4HP17L36P-…A, 14 |
Most heat kept at 5°F
EPA cold-climate designation only.
| Product | Kept at 5°F | Output at 5°F | COP at 5°F | Model numbers |
|---|---|---|---|---|
| Rheem RP18AZ36AJVC | 121% | 43,500 Btu/h | 2.20 | 2 |
| Russell SP18AZ36AJVC | 121% | 43,500 Btu/h | 2.20 | 1 |
| Friedrich FRP18AZ36AJVC | 119% | 43,000 Btu/h | 2.20 | 1 |
| Fujitsu FOP1836MJAZCA | 119% | 43,000 Btu/h | 2.20 | 1 |
| Samsung AC036FCUPCG | 108% | 39,000 Btu/h | 2.41 | 1 |
| Johnson Controls XH936E2C11 | 106% | 33,600 Btu/h | 2.00 | 2 |
| 1HVAC EZ-36-HPB | 105% | 39,000 Btu/h | 1.90 | 5 |
| ComfortStar CPH3H-36CD(O) | 105% | 39,000 Btu/h | 1.90 | 2 |
| Direct Air DIRM4-36MAGICPRO20-OU | 105% | 39,000 Btu/h | 1.90 | 19 |
| Midea MO1SE-H36B-2A | 105% | 39,000 Btu/h | 1.90 | 13 |
Next to the other split-system sizes
Share of 47°F capacity kept at 5°F: dot = class median, ring = 90th percentile.
Certified as of October 27, 2026.