Average Tankless Water Heater Installation Cost
Installing a tankless water heater typically costs $2,500 to $6,500, depending on the unit size, fuel type, and installation complexity.
Electric tankless systems usually cost less to install, while gas tankless systems often cost more because they may require new gas lines, ventilation upgrades, or electrical modifications.
Homeowners comparing system options often review Tank vs Tankless Water Heater Cost before deciding which system best fits their home.
Tankless Water Heater Cost by Type
| System Type | Installed Cost |
|---|---|
| Electric tankless water heater | $2,500 – $4,500 |
| Gas tankless water heater | $3,500 – $6,500 |
Gas systems cost more because they require venting and larger gas supply lines.
Some homes may also require electrical upgrades for proper installation.
Tankless Water Heater Cost by Home Size
| Home Size | Estimated Installation Cost |
|---|---|
| 1–2 bathroom home | $2,500 – $4,000 |
| 3 bathroom home | $3,500 – $5,000 |
| 4+ bathroom home | $4,500 – $6,500 |
Larger homes often require higher capacity systems to supply hot water to multiple fixtures at once.
Factors That Affect Tankless Water Heater Installation Cost
Fuel Type
Gas tankless systems usually cost more to install than electric models because of ventilation requirements and gas line upgrades.
Homeowners often compare fuel options by reviewing Gas vs Electric Water Heater Cost.
Electrical or Gas Upgrades
Some homes require:
- upgraded electrical panels
- larger gas lines
- new venting systems
These upgrades can increase installation costs.
Installation Location
Installing a tankless water heater in tight spaces or relocating plumbing connections may increase labor costs.
Advantages of Tankless Water Heaters
Tankless systems provide several benefits:
- continuous hot water supply
- higher energy efficiency
- longer lifespan than traditional tank heaters
- compact wall-mounted design
Many homeowners consider tankless systems when replacing older water heaters.
Tankless vs Traditional Tank Water Heaters
Tank water heaters are cheaper upfront but have limited hot water capacity.
Tankless systems cost more initially but provide unlimited hot water and better efficiency.
Some homeowners compare both options by reviewing Water Heater Replacement Cost before choosing a system.
FAQ
How much does it cost to install a tankless water heater?
Most tankless water heater installations cost $2,500 to $6,500, depending on system size and installation complexity.
Are tankless water heaters worth the cost?
They can be worth the cost for homeowners who want continuous hot water and improved energy efficiency.
Do tankless water heaters last longer?
Yes. Tankless systems typically last 15 to 20 years, which is longer than many traditional tank water heaters.
Can I replace a tank water heater with a tankless system?
Yes, but installation costs may increase if plumbing, electrical, or gas upgrades are required.
Related Water Heater Cost Guides
Water Heater Replacement Cost Per Gallon
Water Heater Repair vs Replacement Cost