AO Smith Voltex PHPT 50 vs Rheem Proterra PROPH50 T2 RH350
Verdict: The Rheem Proterra PROPH50 T2 RH350 leads with a 3.55 UEF and 72-gallon first-hour rating versus the AO Smith Voltex PHPT 50's 3.42 UEF and 67 gallons (per manufacturer data). Rheem adds Wi-Fi while AO Smith stays simpler and often quieter. Choose Rheem for smart-home integration and marginal efficiency gains; pick AO Smith if you prefer straightforward operation and lower noise.
Winner: Rheem Proterra PROPH50 T2 RH350
AO Smith Voltex PHPT 50: 8/10
Rheem Proterra PROPH50 T2 RH350: 8.5/10
Spec-by-spec comparison
| AO Smith Voltex PHPT 50 | Rheem Proterra PROPH50 T2 RH350 | |
|---|---|---|
| Capacity | 50 gallons | 50 gallons |
| Uniform Energy Factor | 3.42 | 3.55 |
| First Hour Rating | 67 gallons | 72 gallons |
| Dimensions (H x W x D) | — | — |
AO Smith Voltex PHPT 50
What works
- Quiet compressor operation under 50 dB
- Integrated leak detection and auto shutoff
- Flexible installation with multiple ducting options
What doesn't
- Higher upfront cost than standard electric models
- Requires 750 cubic feet of air space for optimal efficiency
Rheem Proterra PROPH50 T2 RH350
What works
- Higher UEF rating for lower operating costs
- Built-in Wi-Fi for remote monitoring and scheduling
- Enhanced cold-weather performance down to 37°F
What doesn't
- Louder fan noise during high-demand cycles
- More complex controls may require app setup
Bottom line
Our pick: Rheem Proterra PROPH50 T2 RH350.
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