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Tankless Water Heater Replacement Cost — Get Accurate Local Estimates

Tankless water heaters provide on-demand hot water and long-term energy savings. Whether you're replacing an existing tankless unit or upgrading from a traditional tank system, understanding the replacement cost is key to making an informed decision.

On this page, you'll find:

  • Average tankless water heater replacement costs
  • Cost differences between gas and electric tankless
  • Factors that impact tankless replacement pricing
  • Long-term savings vs upfront costs

All estimates are adjusted by location.

Average Cost to Replace a Tankless Water Heater

The cost to replace a tankless water heater typically ranges from:

$1,500 – $4,500

for tankless replacement

$2,000 – $5,500

when upgrading from tank to tankless

Tankless replacement costs are higher than standard tank systems because they often involve:

  • Higher unit cost
  • Venting system adjustments
  • Electrical or gas line upgrades
  • More complex installation requirements

Prices vary significantly by city and state.

What's Included in a Tankless Water Heater Replacement

A full tankless water heater replacement may include:

  • New tankless water heater unit
  • Removal of old unit (tank or tankless)
  • Venting system installation or adjustment
  • Electrical or gas line connections
  • Testing and system optimization

Upgrading from tank to tankless may require additional electrical or gas capacity upgrades.

Get a Local Tankless Water Heater Replacement Quote

Tankless systems offer energy efficiency and space savings. Get accurate replacement pricing based on your city and home setup.

Get Local QuoteView Cost By State

Tankless Water Heater Replacement vs Other Options

Standard Tank Replacement

  • Lower upfront cost
  • Simpler replacement process
  • Uses existing connections
View Standard Costs →

New Tankless Installation

  • New system installation
  • Requires new connections
  • Higher cost than replacement
View Installation Costs →

Emergency Tankless Service

  • Same-day or after-hours response
  • Urgent tankless replacement
  • Higher cost for immediate service
View Emergency Costs →

Tankless Replacement

  • On-demand hot water system
  • Higher upfront cost but energy efficient
  • Space-saving design
  • Long-term operational savings

Tankless systems offer energy savings over time, offsetting the higher initial replacement cost.

Tankless Water Heater Replacement Cost by Type

Gas Tankless Replacement

  • Higher capacity for large homes
  • Requires proper venting
  • Lower operating costs

Electric Tankless Replacement

  • Simpler installation
  • May require electrical panel upgrade
  • No venting required

Whole House Tankless

  • Single unit for entire home
  • Higher capacity requirements
  • Best for larger households

Point-of-Use Tankless

  • Smaller units for specific areas
  • Lower replacement cost
  • Multiple units may be needed

What Impacts Tankless Water Heater Replacement Cost

Tankless replacement pricing depends heavily on:

  • Local labor rates
  • Unit capacity and type (gas vs electric)
  • Venting system requirements
  • Electrical or gas line upgrades needed
  • Whether upgrading from tank system

That's why tankless replacement costs differ from city to city.

Always check local tankless replacement pricing.

When Tankless Water Heater Replacement Costs Increase

Your tankless replacement cost may be higher if:

  • You're upgrading from a tank system
  • Electrical panel needs upgrading
  • Gas line capacity must be increased
  • New venting system is required
  • Multiple units are needed for large homes

These factors are common when upgrading to tankless, but the long-term energy savings often offset the initial cost.

What This Page Is NOT

This page focuses on tankless replacement only.

For other intents, see:

Each service has different pricing logic.

Tankless Water Heater Replacement Cost by State

Select your state to find tankless replacement costs in your area: