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Curated Best-Of List

Best Natural Gas Hot Water Heater

3 expert-curated picks ranked by performance, value, and long-term reliability

Natural gas hot water heaters represent about 60% of US residential installs. Natural gas is cheaper to operate than electric resistance in most US markets and the technology is mature, reliable, and serviceable through any plumber. This list covers the natural gas category across tank and tankless types.

Natural gas tank picks

Best mainstream: Rheem Performance Platinum 50-gal Gas

40K BTU, 87-gal FHR, UEF 0.64, 12-year warranty. About $1,650 installed.

Best plumber-installed: Bradford White RG250T6N 50-gal

40K BTU, 6-year warranty. ICON gas control runs through power outages. About $1,950 plumber-installed.

Best high-efficiency: AO Smith Vertex GAHH-50

100K BTU power-vent condensing, UEF 0.86. About $2,800 installed.

Best budget: Rheem Fury 50-gal Gas

40K BTU, 6-year warranty, UEF 0.58. About $1,400 installed.

Natural gas tankless picks

Best overall: Rinnai RU199iN Sensei

199K BTU condensing, UEF 0.96. About $4,000 installed.

Best with built-in recirc: Navien NPE-240A

199K BTU. ComfortFlow built-in recirc. About $4,150 installed.

Best Rheem-channel: Rheem RTGH-95DVLN

199K BTU, UEF 0.93. About $3,500 installed.

Why natural gas dominates

  • Operating cost: ~$33/month for typical household tank. Electric resistance: $48/month. Propane: $67/month. Heat-pump electric: $13/month.
  • Infrastructure: piped continuously from utility. No tank logistics like propane.
  • Equipment selection: widest model range. Specialty options (condensing tankless, power-vent) primarily designed for natural gas.
  • Mature service ecosystem: any plumber works on natural gas units.

Natural gas venting types

  • Atmospheric: rises through chimney/B-vent via natural convection. Cheapest install. Requires existing chimney path.
  • Power-vent: built-in fan pushes exhaust through PVC sidewall. No chimney needed.
  • Condensing (direct-vent): sealed combustion, two-pipe PVC venting, captures latent heat. Highest efficiency.

Install cost summary

ProjectCost
Like-for-like atmospheric gas tank replacement$1,400-$1,800
Atmospheric → power-vent conversion$1,800-$2,500
Atmospheric → condensing conversion$2,500-$3,200
Tank → tankless conversion$3,800-$6,500
3 products
$949 – $1,795
Updated May 2026

Quick Comparison

# Product Brand Rating Price
1 Rinnai RU199iN Sensei Tankless Water Heater Rinnai 4.8 Check current price Amazon
2 Rheem Performance Platinum 50-Gallon Gas Water Heater Rheem 4.6 Check current price Amazon
3 AO Smith Signature Premier 50-Gallon Gas Water Heater AO Smith 4.5 Check current price Amazon