Best Natural Gas Boiler Cost, Efficiency & Lifespan

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A natural gas boiler is a device that burns natural gas, the main component of what we consider to be fossil fuels, to heat water. Natural gas is the cleanest burning fossil fuel, emitting 25% less carbon dioxide than oil and 35% less carbon dioxide than propane. When you choose a natural gas boiler, you need to consider several factors: How efficient is it? How long can it be used for? How much does it cost? Let’s learn together.



What is a natural gas boiler?

A natural gas boiler is a heating system that uses natural gas as its fuel source to heat water. The heated water is then circulated through pipes and radiators or baseboard heaters in your home to provide warmth.

The boiler works by burning natural gas in a combustion chamber and transferring the heat generated to the water in the boiler’s heat exchanger. This process creates hot water or steam that is then distributed throughout the home. Natural gas boilers are popular because they are highly efficient and produce less greenhouse gas emissions than other types of heating systems.

There are two main types of natural gas boilers: condensing and non-condensing. Condensing boilers are more energy-efficient and use a secondary heat exchanger to extract heat from the exhaust gases, resulting in higher efficiency and lower emissions. Non-condensing boilers are typically less efficient but may be a more cost-effective option for homes with lower heating demands.


How does a natural gas boiler work?

Working principle

Here’s a step-by-step breakdown of how a natural gas boiler works:

  1. The boiler draws in natural gas from the gas line through a gas valve and mixes it with air.
  2. A spark ignites the gas-air mixture in the burner, creating a flame that heats the heat exchanger.
  3. The water that passes through the heat exchanger absorbs the heat and is heated to the desired temperature.
  4. The heated water is then circulated through pipes and radiators or baseboard heaters in your home to provide warmth.
  5. As the water cools down, it returns to the boiler to be reheated and circulated again.
  6. The combustion gases produced by burning natural gas are vented out of the home through a flue or chimney.

Modern natural gas boilers are highly efficient, and some models can even recycle heat from combustion gases to further increase their efficiency. Additionally, some natural gas boilers can be used to provide both heat and hot water for your home.


natural gas boiler


How long do natural gas boilers last?

Life expectancy

The lifespan of a natural gas boiler can vary depending on several factors such as the quality of the boiler, the frequency of maintenance, and the amount of use it receives.

On average, a well-maintained natural gas boiler can last between 10 and 15 years. However, some high-quality models can last up to 20 years or more with proper maintenance.

Regular maintenance is key to extending the lifespan of your natural gas boiler. This includes annual inspections, cleaning, and repairs as needed. It’s important to have a qualified professional perform any maintenance or repairs on your boiler to ensure it remains safe and efficient.

Additionally, factors such as water quality, the size of the boiler, and the amount of use it receives can also impact its lifespan. If you live in an area with hard water, for example, mineral buildup in the boiler can reduce its efficiency and shorten its lifespan.


How do I calculate the efficiency of a natural gas boiler?


The efficiency of a natural gas boiler is typically measured by its Annual Fuel Utilization Efficiency (AFUE) rating, which indicates the percentage of fuel that is converted into usable heat. Here’s how to calculate the AFUE of a natural gas boiler:

Determine the amount of heat the boiler produces in a year. This can be calculated by multiplying the boiler’s output in BTUs (British Thermal Units) per hour by the number of hours it runs in a year. For example, if the boiler outputs 100,000 BTUs per hour and runs for 1,500 hours per year, the total heat output for the year is 150 million BTUs.

Determine the amount of fuel the boiler consumes in a year. This can be calculated by measuring the amount of natural gas used in a year and converting it to therms (a unit of heat). To convert natural gas usage to terms, divide the total cubic feet of natural gas used by 100. For example, if the boiler uses 1,000 cubic feet of natural gas per month, the total usage for the year is 12,000 cubic feet or 120 terms.

Calculate the AFUE by dividing the total heat output by the total fuel consumption and multiplying by 100. For example, if the total heat output for the year is 150 million BTUs and the total fuel consumption is 120 terms, the AFUE would be calculated as follows:

150,000,000 BTUs / (120 therms x 100,000 BTUs/therm) = 125%

This means that the boiler has an AFUE of 125%, which is higher than 100% because it includes the heat extracted from the combustion gases as well as the fuel burned.


best natural gas boiler


How do I choose a natural gas boiler?

Choosing a natural gas boiler can be a daunting task, but by following these steps, you can make an informed decision:

  1. Determine your heating needs: Calculate the amount of heating your home requires by considering factors such as the size of your home, insulation, and climate. This will help you determine the right size boiler for your home.
  2. Efficiency: Consider the energy efficiency rating of the boiler. The efficiency rating is an indication of how much energy the boiler will convert into usable heat. A high-efficiency boiler can save you money in the long run.
  3. Brand reputation: Choose a boiler from a reputable brand with a good track record of producing reliable and durable products. Research different brands and read reviews from other customers to determine their reputation.
  4. Cost: The cost of the boiler is an important factor to consider. While a cheaper boiler may seem more attractive, it may not be as efficient or reliable as a more expensive model. Consider the upfront cost as well as the long-term savings when making your decision.
  5. Installation: Make sure you choose a boiler that is compatible with your current heating system and can be installed by a professional. Consider the installation cost and the amount of space needed for the boiler.
  6. Maintenance and servicing: Regular maintenance and servicing are necessary for the efficient operation of your boiler. Choose a boiler that is easy to maintain and has good customer support from the manufacturer.

By considering these factors, you can choose a natural gas boiler that is efficient, reliable, and fits your heating needs.


Natural gas boiler vs furnace

A natural gas boiler and a natural gas furnace are two different types of heating systems that use natural gas as their fuel source. Here’s how they differ:

  1. Function: A natural gas boiler heats water and then distributes the hot water through pipes to heat the space, while a natural gas furnace heats air and then distributes the warm air through ducts to heat the space.
  2. Efficiency: Boilers are generally more efficient than furnaces because they can extract more heat from the same amount of fuel. This is because they don’t have to heat the air and then blow it around, which can lead to heat loss. Instead, they use water to transport heat, which is more efficient.
  3. Installation: Boilers are typically more complex to install than furnaces because they require a network of pipes to distribute hot water. Furnaces, on the other hand, are relatively simple to install because they only require ductwork to distribute warm air.
  4. Maintenance: Both boilers and furnaces require regular maintenance to ensure they operate safely and efficiently. Boilers need more maintenance because they have more components, including pumps, valves, and expansion tanks, that need to be checked regularly. Furnaces require less maintenance, but the ductwork needs to be inspected and cleaned periodically to prevent blockages.
  5. Cost: The initial cost of a boiler is generally higher than that of a furnace, primarily because of the additional equipment and installation required. However, boilers can have a longer lifespan than furnaces, so they may be more cost-effective over the long term.

Overall, the choice between a natural gas boiler and a natural gas furnace depends on the specific heating needs of your home, as well as your budget and preferences.


natural gas boiler cost


How much does a natural gas boiler cost?

Natural gas boiler prices

The cost of a natural gas boiler can vary depending on several factors such as the type and size of the boiler, the brand, and where you live.

On average, a high-efficiency natural gas boiler can cost anywhere from $2,500 to $7,500, including installation. However, more advanced models or larger units can cost up to $10,000 or more.

It’s important to consider not just the initial cost of the boiler but also its long-term energy efficiency and maintenance costs. A higher-priced, high-efficiency boiler may save you money in the long run by reducing your monthly energy bills and requiring less frequent maintenance. Additionally, the cost of installation can vary depending on factors such as the complexity of the installation, local building codes, and the cost of labor in your area.



In conclusion, natural gas boilers are a great choice for you looking to replace your old heating system. This type of boiler is more efficient than other kinds of systems and can save you money on your monthly energy bill. They also require less maintenance than other types of boilers do so they won’t break down as often! If you want to learn about the detailed parameters and prices of natural gas boilers, please contact us at +0086 186-2391-5479.

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