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Tankless Vs. Traditional Water Heaters: Which Is Best?

July 25, 20254 min read

Deciding between a Tankless Vs. Traditional Water Heater can be a major decision for homeowners, especially when energy efficiency, installation costs, and long-term reliability are at stake. Whether you’re building a new home or replacing an aging unit, understanding the Water Heater Comparison between these two popular options is key to choosing the Best Water Heater For Home use.

At Eastside Repipe & Plumbing, we specialize in helping homeowners make smart, cost-effective plumbing choices. This guide breaks down everything you need to know about Tankless Vs. Traditional Water Heaters, so you can make an informed decision.

What Is a Traditional Water Heater

A traditional water heater, also known as a storage-tank water heater, stores hot water in a tank ranging from 30 to 80 gallons. It heats water continuously, maintaining a set temperature until it’s used.

Pros:

  • Lower upfront cost

  • Easy installation

  • Works well for high-demand households

Cons:

  • Higher energy bills due to standby heat loss

  • Limited hot water capacity (can run out)

  • Shorter lifespan (8–12 years)

Traditional units are a reliable choice, especially if your home has older plumbing or if you prefer a budget-friendly installation.

What Is a Tankless Water Heater

A tankless water heater, often called an on-demand water heater, heats water only when needed. It doesn’t store water but uses electric coils or gas burners to heat water as it flows through the system.

Pros:

  • Energy efficient (no standby heat loss)

  • Endless hot water supply

  • Space-saving design

  • Longer lifespan (15–20 years)

Cons:

  • Higher upfront cost

  • May require upgrades to electrical/gas systems

  • Limited output for simultaneous use (multiple showers, laundry, etc.)

For energy-conscious homeowners or those with limited space, a tankless unit may be the Best Water Heater For Home comfort and efficiency.

tankless water heater

Key Water Heater Comparison Points

1. Energy Efficiency

  • Tankless: Wins on efficiency. No energy is wasted keeping a tank hot.

  • Traditional: Constantly uses energy to maintain heat—even when not in use.

2. Installation Costs

  • Tankless: Higher due to electrical/gas system upgrades and ventilation needs.

  • Traditional: Lower cost and easier to install.

3. Hot Water Availability

  • Tankless: Provides a continuous flow of hot water.

  • Traditional: Limited to the tank’s capacity, then you wait for reheating.

4. Maintenance Requirements

  • Tankless: Requires annual flushing due to mineral buildup.

  • Traditional: Also needs flushing but may fail faster if neglected.

5. Lifespan

  • Tankless: Up to 20 years

  • Traditional: Around 10–12 years

These factors should all be considered when weighing Tankless Vs. Traditional Water Heater systems.

Which Is the Best Water Heater for Home Use

The right choice depends on your household’s needs, budget, and long-term goals:

Choose a Tankless Water Heater If:

  • You value energy efficiency

  • You want to save on utility bills long-term

  • Your family needs hot water throughout the day

  • You have limited space

Choose a Traditional Water Heater If:

  • You want lower upfront costs

  • Your usage is predictable (e.g., 2–3 showers a day)

  • You plan to move in a few years

Need help making the decision? Our team at Eastside Repipe & Plumbing can assess your needs and recommend the most cost-effective solution.

water-heater

Real-Life Scenario: A Bay Area Family’s Dilemma

A local family in the Seattle suburbs recently called Eastside Repipe & Plumbing to replace their failing 12-year-old tank unit. They had two teens and frequent guests, so running out of hot water was a daily complaint. After discussing the Tankless Vs. Traditional Water Heater pros and cons, they opted for a gas-powered tankless model. Now they enjoy uninterrupted hot showers, lower energy bills, and more floor space.

What to Ask Before Choosing a Water Heater

  • How many people live in your home?

  • Do you often run multiple appliances at once?

  • Is energy efficiency a top priority?

  • Are you planning to stay in your home long-term?

  • Can your plumbing or electrical system support a tankless system?

Answering these questions will help determine the Best Water Heater For Home performance and comfort.

Professional Installation Matters

Whether you choose tankless or traditional, expert installation is essential. Poor installation can lead to:

  • Inefficient heating

  • Leaks or water damage

  • Reduced lifespan

  • Voided warranties

At Eastside Repipe & Plumbing, we offer full-service installation and maintenance for all water heater types, along with reliable General Plumbing solutions to ensure your system works seamlessly.

Still Deciding Between Tankless Vs Traditional Water Heater

Let us help. Our certified plumbers will assess your household size, water usage, and budget to offer an honest Water Heater Comparison. We also handle routine maintenance, emergency repairs, and new installations.


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