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Average Score
Average Score
The TriPac Evolution's electric A/C system provides superior cooling performance, especially in extreme heat. Thermo King's refrigeration expertise shows in the consistent, quiet cooling. RigMaster's cooling is adequate but cannot match Thermo King's refinement.
RigMaster's diesel-fired heater provides robust heating in the coldest conditions. The TriPac Evolution uses a diesel-fired coolant heater that is also effective but RigMaster's direct heat output is slightly stronger in extreme cold.
The TriPac Evolution uses 0.1-0.2 gallons per hour — significantly less than RigMaster's 0.2-0.4 gallons per hour. Over 2,000 idle hours per year, the fuel savings with the TriPac are substantial.
The TriPac Evolution is notably quieter than diesel-powered APUs like the RigMaster. Its electric A/C compressor operates at near-whisper levels. For drivers trying to sleep, the noise difference is meaningful.
RigMaster's simpler mechanical design can be serviced by any diesel mechanic. The TriPac Evolution's hybrid electric-diesel system requires more specialized service knowledge and Thermo King dealer access.
| Category | RigMaster APU | Thermo King TriPac Evolution | Leader |
|---|---|---|---|
| Cooling Performance | 82 | 90 | Thermo King TriPac Evolution |
| Heating Performance | 88 | 85 | RigMaster APU |
| Fuel Consumption | 78 | 85 | Thermo King TriPac Evolution |
| Noise Level | 72 | 88 | Thermo King TriPac Evolution |
| Maintenance Cost | 82 | 78 | RigMaster APU |
| Overall Average | 80 | 85 | Thermo King TriPac Evolution |
The Thermo King TriPac Evolution wins on cooling performance, fuel efficiency, and noise levels. For drivers who prioritize quiet, efficient climate control for sleeping, the TriPac Evolution is the premium choice.
RigMaster APU wins for drivers in extreme cold climates who need robust heating and want simpler maintenance from any diesel shop. The lower purchase price and universal serviceability have practical value.
Full-time OTR drivers who value sleep quality should invest in the TriPac Evolution. Budget-conscious operators in cold climates may prefer RigMaster's simpler, more affordable approach.
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Published March 25, 2026