A.O. Smith Voltex PHPT 50 vs Rheem Proterra PROPH50 T2 RH350

By Billy G. · Founder & Lead EditorVerified Jun 7 by Billy G.

A.O. Smith Voltex PHPT 50
Rheem Proterra PROPH50 T2 RH350
Verified Confidence: 85%

Verdict: The Rheem Proterra PROPH50 T2 RH350 wins on efficiency metrics with a 3.75 UEF and 75-gallon first-hour rating per Rheem specs, beating the A.O. Smith Voltex PHPT 50's 3.45 UEF and 70 gallons. A.O. Smith remains competitive on price and noise levels according to owner feedback aggregated on Consumer Reports. Choose Rheem if energy savings over 10 years matter most; pick A.O. Smith for lower initial outlay.

Winner: Rheem Proterra PROPH50 T2 RH350

A.O. Smith Voltex PHPT 50: 7.5/10

Rheem Proterra PROPH50 T2 RH350: 8.2/10

Spec-by-spec comparison

A.O. Smith Voltex PHPT 50Rheem Proterra PROPH50 T2 RH350
Capacity50 gallons50 gallons
Uniform Energy Factor3.453.75
First Hour Rating70 gallons75 gallons
Warranty10 years10 years

A.O. Smith Voltex PHPT 50

What works

  • Lower upfront cost than many competitors
  • Quiet operation at 55 dB
  • Compatible with standard 240V circuits

What doesn't

  • Lower UEF than Rheem model
  • Slower recovery in cold climates

Rheem Proterra PROPH50 T2 RH350

What works

  • Higher efficiency rating saves more on energy bills
  • Stronger first-hour delivery for larger households
  • Built-in leak detection and Wi-Fi connectivity

What doesn't

  • Higher purchase price
  • Louder compressor at 58 dB

Bottom line

Our pick: Rheem Proterra PROPH50 T2 RH350.

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