Trane Priority 17 Gas System
Formerly XR17
The Trane Priority 17 gas system pairs a multi-speed inverter air conditioner (formerly the XR17) with a compatible Trane gas furnace. The AC side uses the same 6-speed inverter compressor as the heat pump version, delivering the same quiet operation, efficiency, and comfort benefits on the cooling side.
If you need a gas system, this is our top recommendation. The multi-speed inverter compressor runs at the lowest effective speed for conditions, meaning quieter operation, lower energy bills, and more consistent temperatures compared to single-stage systems. The gas furnace handles heating separately with rapid, high-temperature output.
Key Features
Multi-Speed Inverter Compressor
6 discrete speed stages for cooling. Runs at the lowest effective speed, delivering better comfort and efficiency than single-stage.
Spine Fin Outdoor Coil
Corrosion-resistant coil technology for Arizona's harsh conditions.
Gas Furnace Heating
Paired with your choice of Trane gas furnace for rapid, high-temperature heating.
Noticeably Quieter
Lower speed stages run most of the time, making a real difference for outdoor living areas near the condenser.
Full Specifications
| SEER2 | Up to 17.4 |
| Compressor | Multi-Speed Inverter |
| Stages | Multi-Stage (6 speeds) |
| Sound Level | As low as 68 dB |
| Warranty | 12-Year Limited Parts |
| Refrigerant | R-454B (A2L) |
| Heating | Gas Furnace (sold separately) |
| Sizes Available | 2 Ton, 2.5 Ton, 3 Ton, 3.5 Ton, 4 Ton, 5 Ton |
| Model Numbers | 5TTR7024A1000A5TTR7030A1000A5TTR7036A1000A5TTR7042A1000A5TTR7048A1000A5TTR7060A1000A |
| Legacy Model Prefix | 4TTR7 |
Is This the Right System for You?
Ideal For
The Priority 17 gas system is our top recommendation for homeowners who want or need gas heating and want the best cooling comfort and efficiency at a mid-range price. The multi-speed inverter compressor delivers a noticeable upgrade over single-stage systems.
Consider an Alternative If
If you don't specifically need gas heating, a heat pump version of the Priority 17 will be more efficient overall since it handles both cooling and heating with one system. Heat pumps are the better choice for most Arizona homes.
A2L Refrigerant Transition
Legacy model prefix: 4TTR7
Previously sold as the XR17 AC with model numbers starting with 4TTR7 (R-410A, traditional two-stage). Current models (5TTR7) use R-454B refrigerant and an upgraded multi-speed inverter compressor with 6 stages.
Related Models
Other Trane systems you might want to compare.
Got a Quote for a 5TTR7?
Let us give you a second opinion. We'll make sure you're getting the right system at a fair price, with expert installation.