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How Long Should a Water Heater Last in Louisiana? Signs It’s Time to Replace

  • Writer: Matt Deslatte
    Matt Deslatte
  • Oct 9
  • 2 min read
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In Baton Rouge, most tank (storage) water heaters last 8–12 years. Tankless units typically run 15–20+ years. Lifespan varies with Louisiana’s heat/humidity, mineral content/sediment, household usage, and whether the unit’s been flushed and serviced regularly.


Clear signs it’s nearing the end

  • Age: Tank at 10+ years (tankless 15+)—start planning.

  • Rusty/discolored hot water: Internal tank corrosion or failing anode rod.

  • Moisture or leaks at the base: Small seep today, major leak tomorrow.

  • Rumbling/popping: Hardened sediment makes the burner overwork.

  • Inconsistent temps / shorter showers: Declining efficiency or failing parts.

  • Rising energy bills or frequent repairs: Replacement may be the smarter spend.


Pro tip: Check the serial number on the rating plate for manufacture date.

Tank vs. Tankless: Which Fits Your Baton Rouge Home?


Upfront vs. operating cost

  • Tank: Lower upfront; higher standby energy use.

  • Tankless: Higher upfront/installation; typically lower ongoing energy costs.


Lifespan

  • Tank: ~8–12 years.

  • Tankless: ~15–20+ years with annual maintenance.


Comfort & performance

  • Tank: Fixed volume (can run out on back-to-back showers).

  • Tankless: “Endless” hot water—size for demand (aim ~7+ GPM for two showers).


Space & install

  • Tank: Needs floor space (garage/closet/attic pan).

  • Tankless: Wall-mounted; may require gas line upsizing/venting or panel upgrades (electric).


Baton Rouge considerations

  • Warmer groundwater here helps tankless deliver better flow.

  • Most tankless models need electricity—consider backup power for outages.


Quick picks

  • Choose Tank for the lowest upfront cost or short-term/rental homes.

  • Choose Tankless for long-term efficiency, space savings, and back-to-back usage.


Make yours last longer

  • Flush annually to remove BR sediment.

  • Replace anode rod every 3–5 years.

  • Set temp to 120°F to reduce scaling & save energy.

  • Consider a whole-home filter/conditioner.

  • Add a drain pan & expansion tank for protection.

 
 
 
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