Tank vs. Tankless Water Heater Comparison
Compare the 10-year total cost of ownership between tank and tankless water heaters.
Tank vs. Tankless Water Heater Comparison
Enter your current water heater type and household details for a personalized comparison.
Frequently Asked Questions
Is a tankless water heater worth the extra cost?
Tankless units cost $1,000–$3,000 more upfront but save $100–$200/year on energy and last twice as long (20 years vs 10–12 years). For most households, they break even in 8–12 years.
How much does a tankless water heater save?
Tankless water heaters are 24–34% more efficient than conventional tank heaters for homes using 41 gallons or less per day. That translates to $100–$200 in annual energy savings.
Can a tankless water heater supply enough hot water?
A properly sized tankless unit provides unlimited hot water. However, it has a limited flow rate (2–5 GPM for gas). Large households running multiple hot water fixtures simultaneously may need two tankless units.
What about heat pump water heaters?
Heat pump water heaters are the most energy-efficient option, using 60–70% less energy than conventional electric tanks. They qualify for a $2,000 federal tax credit, making them very competitive on total cost.
Does switching to tankless require new plumbing?
Switching to tankless may require upgrading your gas line, adding a condensate drain, or upgrading electrical service. These modifications can add $500–$2,000 to the installation cost.
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