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Heat Pump Water HeatersHigh-efficiency electric replacements and hybrid tanks.Condensing Tankless Water HeatersCondensing whole-home flow with venting constraints.Gas Tank Water HeatersStraight swaps when gas storage is still the fit.

Plan Your Swap

Sizing guideCapacity, first-hour rating, and temperature-rise fit.Accessories hubInstall extras, code-adjacent parts, and paid-link accessory picks.Upgrade from NHP50Replacement candidates and projected operating-cost delta.Upgrade from NHP65Replacement candidates and projected operating-cost delta.Upgrade from NHP80Replacement candidates and projected operating-cost delta.Upgrade from NPE 210S2Replacement candidates and projected operating-cost delta.Upgrade from PROE50 T2 RH95Replacement candidates and projected operating-cost delta.HPTA 50 2 vs HPTA 80 2Side-by-side specs, efficiency, and fit differences.HPTS 50 2 vs NHP50Side-by-side specs, efficiency, and fit differences.NHP120 vs PROPH80 T2 RH400 30Side-by-side specs, efficiency, and fit differences.NPE 210S2 vs NPE 240S2Side-by-side specs, efficiency, and fit differences.

Guides & Data

California heat pump guideLocal rates, rebates, and operating costs.Colorado heat pump guideLocal rates, rebates, and operating costs.Massachusetts heat pump guideLocal rates, rebates, and operating costs.Oregon heat pump guideLocal rates, rebates, and operating costs.Washington heat pump guideLocal rates, rebates, and operating costs.DOE 2029 standardsWhat changes in 2029 and which product classes move first.

Brands

A.O. Smith Water HeatersPublished models, product lines, and brand coverage.Bradford White Water HeatersPublished models, product lines, and brand coverage.Navien Water HeatersPublished models, product lines, and brand coverage.Noritz Water HeatersPublished models, product lines, and brand coverage.Rheem Water HeatersPublished models, product lines, and brand coverage.Rinnai Water HeatersPublished models, product lines, and brand coverage.Takagi Water HeatersPublished models, product lines, and brand coverage.
Home / Replace / NHP50
Upgrade path

Upgrade from NHP50

4 verified replacements for the Noritz NHP50.
Every replacement below is a published model with verified specs. Savings calculated from EIA average energy prices.

Quick verdict

Fewest install changes Rheem PROPH50 T2 RH400-30 1 install change
Lowest annual bill Bradford White RE2HP50-1NCTT $144/yr
Shortest unit Bradford White RE2HP50-1NCTT 46.1" tall
Your NHP50 costs $162/yr. Every option below cuts that bill. See all heat pump models

What your current unit costs to operate

Annual$162/yr
10-year projection$1,620

Based on U.S. average energy rates (EIA). UEF 3.46.

Replacement options

Rheem PROPH50 T2 RH400-30

Heat Pump

UEF 3.88 / ~$146/yr / 10-yr tank warranty

UEF jumps from 3.46 to 3.88, Rheem is shorter at 61.75 vs 58.3 inches

Annual savings$16/yr
10-year savings$160
Install changes
  • Needs condensate drain (your current unit does not)
  • 3.5" taller than your current unit
  • 5.8" narrower than your current unit
Full specs · Compare side by side

Bradford White RE2HP50-1NCTT

Heat Pump

UEF 3.89 / ~$144/yr / 10-yr tank warranty

UEF jumps from 3.46 to 3.89, Bradford White is much shorter at 46.1 inches

Annual savings$18/yr
10-year savings$180
Install changes
  • 12.2" shorter than your current unit
  • 10.0" narrower than your current unit
Full specs

Navien NWP500S050AUMB

Heat Pump

UEF 3.85 / ~$145/yr / 10-yr tank warranty

UEF jumps from 3.46 to 3.85

Annual savings$17/yr
10-year savings$170
Install changes
  • Needs condensate drain (your current unit does not)
  • 4.7" taller than your current unit
  • 6.3" narrower than your current unit
Full specs · Compare side by side

Rinnai REHP50BM

Heat Pump

UEF 3.75 / ~$146/yr / 10-yr tank warranty

UEF jumps from 3.46 to 3.75

Annual savings$16/yr
10-year savings$160
Install changes
  • Needs condensate drain (your current unit does not)
  • 8.1" taller than your current unit
  • 6.3" narrower than your current unit
Full specs · Compare side by side
Side by side, the key differences.

Replacement comparison

SpecYour unitPROPH50 T2 RH400-30RE2HP50-1NCTTNWP500S050AUMBREHP50BM
UEF3.463.883.893.853.75
Annual Cost$162/yr$146/yr$144/yr$145/yr$146/yr
Annual Savings$16/yr$18/yr$17/yr$16/yr
Height58.3"61.8"46.1"63"66.4"
Width28.0"22.2"18.0"21.7"21.7"
Warranty10 yr10 yr10 yr10 yr10 yr

● Best value in each row. Your unit column shows the model being replaced.

Common install considerations for heat pump units

What is required depends on your existing installation, local code, and installer preference.

Thermal Expansion Tank Often required by code Check on Amazon (paid link)
Water Heater Drain Pan Often required by code Check on Amazon (paid link)
Earthquake Straps (Seismic Restraints) Often required by code Check on Amazon (paid link)
Full accessories list

The federal tax credit of up to $2,000 under IRA Section 25C expired December 31, 2025. State and utility rebates may still apply.

Related
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Sources. ENERGY STAR, manufacturer spec sheets, EIA average energy prices.Methodology