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Best Propane Water Heater

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

Propane (LP) water heaters cover both tank and tankless options for rural homes and other applications without natural gas service. The category is essentially identical to natural gas water heaters except for the fuel orifice sizing and regulator requirements.

Propane tank water heaters

Best propane storage tank: Rheem Performance Platinum 50-gal LP

40K BTU LP, UEF 0.64, 87-gallon FHR, 12-year warranty. Atmospheric vent. About $899 unit, $1,750 installed.

Best plumber-installed propane tank: Bradford White 50-gal LP

40K BTU LP, UEF 0.62, 6-year warranty, ICON gas control. About $1,950 plumber-installed.

Best 75-gallon propane: Rheem Performance Platinum 75-gal LP

76K BTU LP, 110-gallon FHR. For 5+ person households. About $1,400 unit, $2,400 installed.

Propane tankless water heaters

Best indoor: Rinnai RU199iP

199K BTU LP, UEF 0.96 condensing. About $4,200 installed.

Best outdoor: Rinnai V94eP

199K BTU LP, exterior mount. About $3,600 installed.

Best off-grid portable: Eccotemp L10

75K BTU LP, 2.6 GPM, battery-fired. About $370 unit.

Propane operating cost reality

TypeUEFMonthly cost (4-person household)
Propane atmospheric tank0.62~$67
Propane condensing tankless0.96~$42
Comparison: natural gas atmospheric tank0.62~$33
Comparison: heat-pump electric3.55~$13

Propane is meaningfully more expensive to operate than natural gas — about 2× per BTU. For rural homes without natural gas access, propane is often the only fuel option. Where heat-pump electric is feasible (homes with adequate basement install location), it dramatically beats propane on operating cost.

When propane is the right choice

  • Rural property with no natural gas service available
  • Off-grid cabin or vacation home (combined with battery-fired tankless)
  • Mobile home or RV applications
  • Backup or emergency systems for grid-vulnerable installations

Property tank sizing

  • 120-gallon LP tank: single-person households with light use only. Inadequate for typical residential.
  • 250-gallon LP tank: standard residential for 2-4 person households. Refueling 3-4× yearly.
  • 500-gallon LP tank: larger households or heating + DHW combined load. Refueling 2-3× yearly.
  • 1,000-gallon LP tank: very large households or commercial applications.

Buried tanks add $1,500-$3,000 in install but improve aesthetics. Above-ground is the cost-effective choice for most residential.

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