RatingPlate Find your size
Browse the site

Type guides, state costs, model specs, and brand pages.

Heater Types

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 / NPE-210S2
Upgrade path

Upgrade from NPE-210S2

3 verified replacements for the Navien NPE-210S2.
Every replacement below is a published model with verified specs. Savings calculated from EIA average energy prices.

Quick verdict

Fewest install changes Navien NPE-240S2 1 install change
Lowest annual bill Navien NWP500S050AUMB $145/yr
Shortest unit Rheem RTGH-95DVLN-3 23.0" tall
Your NPE-210S2 costs $239/yr. Every option below cuts that bill. See all condensing tankless models

What your current unit costs to operate

Annual$239/yr
10-year projection$2,390

Based on U.S. average energy rates (EIA). UEF 0.96.

Replacement options

Navien NPE-240S2

Condensing Tankless

UEF 0.96 / ~$239/yr

Same brand upgrade, higher BTU (199k vs 180k) and GPM (5.8 vs 5.3)

Install changes
  • Needs condensate drain (your current unit does not)
Full specs · Compare side by side

Rheem RTGH-95DVLN-3

Condensing Tankless

UEF 0.93 / ~$250/yr

Cross-brand, much higher GPM (9.5 vs 5.3) for multi-fixture demand

Operating cost is similar to your current unit ($11/yr more).
Install changes
  • Needs condensate drain (your current unit does not)
  • No venting required (your current unit has a vent)
  • 4.4" shorter than your current unit
Full specs · Compare side by side

Navien NWP500S050AUMB

Heat Pump

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

Same brand, gas to electric switch, UEF jumps from 0.96 to 3.85 but requires tank space and 240V

Annual savings$94/yr
10-year savings$940
Install changes
  • Requires 240V (your current unit is 120V)
  • 30A breaker needed (currently 15A)
  • Needs condensate drain (your current unit does not)
  • No venting required (your current unit has a vent)
  • 35.6" taller than your current unit
  • 4.4" wider than your current unit
Full specs · Compare side by side
Side by side, the key differences.

Replacement comparison

SpecYour unitNPE-240S2RTGH-95DVLN-3NWP500S050AUMB
UEF0.960.960.933.85
Annual Cost$239/yr$239/yr$250/yr$145/yr
Annual Savings$0/yr$-11/yr$94/yr
Height27.4"27.4"23"63"
Width17.3"17.3"18"21.7"
Warranty——10 yr

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

Common install considerations for gas tankless units

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

Condensate Neutralizer Kit Commonly required Check on Amazon (paid link)
Gas Flex Connector Commonly required Check on Amazon (paid link)
Venting Kit Commonly required 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
As an Amazon Associate I earn from qualifying purchases. RatingPlate may earn a commission when you use qualifying Amazon links. Links to Amazon are marked "(paid link)". We never display prices because Amazon prohibits showing prices outside their platform.
Sources. ENERGY STAR, manufacturer spec sheets, EIA average energy prices.Methodology