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Tankless water heater blog

Plain-English guides to tankless water heater cost, sizing, installation, maintenance, repair and brands, written to help you buy the right unit the first time.

Cost and buying

Cost and buyingBest tankless water heaters of 2026 by typeCost and buyingHow much does a tankless water heater cost in 2026?Cost and buyingTankless water heater installation cost, line by lineCost and buyingTankless water heater pros and consCost and buyingTankless water heater rebates and tax credits in 2026

Sizing and comparisons

Sizing and comparisonsCondensing vs non-condensing tankless water heatersSizing and comparisonsGas vs electric tankless water heaterSizing and comparisonsHow does a tankless water heater work?Sizing and comparisonsTankless vs tank water heaterSizing and comparisonsTankless water heater sizing guide and calculatorSizing and comparisonsTankless water heater vs heat pump water heater

Installation

InstallationRecirculation pumps for tankless water heatersInstallationTankless water heater installation guideInstallationTankless water heater installation requirementsInstallationTankless water heater venting guide

Maintenance

MaintenanceHow long does a tankless water heater last?MaintenanceHow to flush a tankless water heaterMaintenanceTankless water heater maintenance checklistMaintenanceWater filters and softeners for tankless water heaters

Repair and error codes

Repair and error codesRheem tankless water heater error codesRepair and error codesRinnai tankless water heater error codesRepair and error codesTankless water heater error codes explainedRepair and error codesTankless water heater repair and troubleshooting

Brands

BrandsA.O. Smith and Takagi tankless water heaters guideBrandsBosch tankless water heaters guideBrandsEcoSmart tankless water heaters guideBrandsNavien tankless water heaters guideBrandsNoritz tankless water heaters guideBrandsRheem tankless water heaters guideBrandsRinnai tankless water heaters guideBrandsStiebel Eltron tankless water heaters guideBrandsTankless water heater brands compared

Special uses

Special usesCommercial tankless water heaters guideSpecial usesMobile home water heater guideSpecial usesPoint-of-use tankless water heater guideSpecial usesRV tankless water heater guideSpecial usesTankless boilers, combi units and tankless coils

Shop by type

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