Why use a boiler instead of a water heater?

Author: Alice

Jan. 13, 2025

The Distinctions Between a Boiler and a Water Heater

Understanding the differences between boilers and water heaters is essential for homeowners. While both are crucial for heating water in the home, they achieve this in different ways. Boilers focus on heating spaces as well, whereas water heaters are dedicated solely to providing hot water for domestic use.

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What Is a Boiler?

A boiler is a system that offers both heating and hot water supply to a residential space. It operates similarly to other heating systems, such as HVAC systems or furnaces, by heating water within a large sealed tank using energy sources like oil, natural gas, propane, or electricity.

The heated water, maintained at temperatures between 145 to 190°F, circulates throughout the home via pipes, reaching radiators or other heating devices. After reaching the termination points, the water cycles back to the boiler to be reheated, creating a consistent loop of warmth.

Types of Boilers

  • Water boiler
  • Steam boiler
  • Combination boiler (water heater)
  • Oil boiler

Uses for Boilers

Boilers are primarily used in residential settings to generate steam or hot water for various heating systems.

What Is a Water Heater?

A water heater is designed specifically to heat cold water to a designated temperature for household use, without providing space heating.

Cold water enters the heater and is heated through electric coils or a gas flame, exiting at the top to be distributed throughout the house via pipes.

Types of Water Heaters

  • Tank-type water heater
  • Hot water recirculation pump
  • Tankless water heater
  • Indirect water heater
  • Combination boiler (water heater)

Uses for Water Heaters

Water heaters are responsible for providing hot water for:

  • Bathing
  • Personal cleaning tasks
  • Washing dishes
  • Using a dishwasher
  • Hot water for laundry machines
  • Consumption

Similarities Between Boilers and Water Heaters

While their functions differ, both systems share certain characteristics:

  • Heating water in a sealed tank
  • Distribution of hot water throughout the home
  • Pressurized tanks

Differences Between Boilers and Water Heaters

Despite some similarities, boilers and water heaters have distinct differences:

Efficiency

In general, water heaters tend to be more energy-efficient than boilers. Particularly, tankless water heaters can exhibit higher efficiency levels. However, high-efficiency boiler models still provide good energy performance relative to traditional furnaces.

Installation Cost

The costs of installing boilers are typically higher, averaging $5,800, whereas water heaters generally only cost around $1,200. Installation expenses for water heaters can range from $1,000 to $3,500, making them a more budget-friendly option.

Maintenance

Water heaters require less frequent maintenance compared to boilers, which need more comprehensive annual checks and more frequent servicing due to the complexity of their systems.

Lifespan

Boilers usually last 25 years or more when maintained properly, while water heaters typically last between 6 to 10 years.

Combined Boiler and Water Heater Services

Boilers primarily provide heat for space, with the capacity to also supply hot water for domestic use. As such, some households opt for combining the two systems into a more compact, efficient setup.

Combination Boiler Water Heater

Combination boilers are high-efficiency units that perform both functions, seamlessly supplying hot water and heating for the home without requiring separate appliances.

Indirect Water Heater

Indirect water heaters utilize the heat from a boiler to warm the water, allowing them to benefit from the boiler's efficiency.

FuShiDe Boiler systems can be a reliable solution for your home heating and hot water needs.

Interested in exploring a Hot Water Boiler System? Contact us today for expert consultation!

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