High Efficiency Gas Boiler Efficiency, Installation & Prices

When it comes to choosing the right boiler for your buiness, it’s essential to consider energy efficiency and long-term cost savings. In this guide, we’ll explore the benefits of high-efficiency gas boilers, their maximum efficiency, lifespan, and maintenance requirements, all while highlighting the advantages of choosing a Fangkuai Boiler for you.

What is a high-efficiency gas boiler?

A high-efficiency gas boiler is a heating system designed to trap escaping the heat and direct it back into heating the home through a process known as “condensing”. These boilers are also referred to as condensing boilers. High efficiency gas boilers produce heat by burning natural gas or propane fuel and achieve higher energy efficiency levels than traditional boilers. They do this by utilizing advanced technology such as condensing heat exchangers and modulating burners. The benefits of it include lower energy bills and reduced greenhouse gas emissions.


Get an online fixed price in 20 seconds:

Q What kind of fuel does your boiler use?


Working principle.

High efficiency gas boilers work by utilizing a process called condensing. In a high-efficiency gas boiler, these gases are cooled down, causing the water vapor to condense back into liquid form. This condensed water, or condensate, contains valuable heat energy that is then used to preheat the incoming cold water, making the entire system more efficient. Additionally, high-efficiency condensing gas boilers often feature fully modulating burners, which adjust the flame size based on the heating demand, further improving efficiency.


Best high efficiency boiler


What is the difference between a high-efficiency boiler and a traditional boiler?

High-Efficiency Boilers:

  • Higher energy efficiency: AFUE rating above 90%.
  • Condensing technology: Capture and reuse heat from exhaust gases.
  • Modulating burners: Adjust flame size based on heating demand for improved efficiency.
  • Lower greenhouse gas emissions: Due to higher efficiency and lower fuel consumption.
  • Lower energy bills: Save up to 50% on energy bills when upgrading from an older conventional boiler.
  • Stainless steel or aluminum heat exchangers: Durable and better heat transfer capabilities.
  • Smaller and lighter: Compact design, easier to install and maintain.

Traditional Boilers:

  • Lower energy efficiency: AFUE rating typically between 56% and 70%.
  • No condensing technology: Heat from exhaust gases is not captured and reused.
  • Fixed burners: Flame size remains constant, regardless of heating demand.
  • Higher greenhouse gas emissions: Due to lower efficiency and higher fuel consumption.
  • Higher energy bills: Less efficient operation leads to higher energy costs.
  • Cast iron or other materials for heat exchangers: Less efficient heat transfer.
  • Larger and heavier: More difficult to install and maintain.



How do you check the efficiency of your own gas boiler?

To check the efficiency of your gas boiler, you can use the following 4 different methods:

  1. Locate the boiler’s AFUE (Annual Fuel Utilization Efficiency) rating. This rating is usually displayed on a label attached to the boiler or in the boiler’s manual. The higher the AFUE rating, the more efficient the boiler is.
  2. Perform a simple stack analysis or, for a more accurate assessment, measure the gas input vs. steam output. This can help you determine the efficiency of your boiler in real time.
  3. Compare the efficiency of your current boiler with the efficiency of a new high-efficiency boiler. Subtract the current boiler’s efficiency from the new boiler’s efficiency, and multiply the result by your annual heating bill. This can help you estimate potential savings from upgrading to a high-efficiency boiler.
  4. Use an online boiler efficiency calculator to get an estimate of your boiler’s efficiency. These calculators typically require information on fuel type, fuel consumption, and boiler output.


High efficiency gas boiler vs standard


To install a high-efficiency gas boiler, you can follow these general steps:

  1. Mount a plywood panel: Secure a plywood panel to the wall to serve as a mounting panel for the new boiler.
  2. Run new gas, electrical, and plumbing lines: Connect the necessary lines to the plywood panel.
  3. Install metal mounting brackets: Screw the metal mounting brackets to the plywood panel.
  4. Hang the combination heater: Place the high-efficiency gas boiler onto the brackets.
  5. Connect the boiler: Attach the gas, electrical, and plumbing lines to the boiler.
  6. Install venting and exhaust: Set up the proper venting and exhaust system for the boiler.
  7. Install a condensate drain: As high-efficiency boilers produce condensate, ensure there is a proper drainage system to dispose of the condensate.
  8. Connect the boiler to the heating system: Attach the boiler to the existing heating system, such as radiators or underfloor heating.
  9. Test the system: Turn on the boiler and check for any leaks or issues. Make necessary adjustments and ensure the boiler is operating correctly.
  10. Insulate the pipes: Insulate hot water pipes to reduce heat loss and improve efficiency.


Get FREE Boiler Quotes

  • Get FREE Local Boiler Quotes Today
  • Compare The Best Prices
  • Save Money On Your New Boiler Today!

Get My Free Quotes Now


What is the price of a high-efficiency gas boiler?

The price of a high-efficiency gas boiler can vary depending on the brand, model, and size of the unit. In general, high efficiency gas boilers tend to be more expensive upfront than traditional boilers. The prices ranged from around $5,500 to $80,000 or more, not including installation costs. It’s essential to consider the long-term savings and environmental benefits when deciding whether to invest in it.

Size (Tons) Efficiency (AFUE) Price Range (USD)
1-5 90-93% $5,500 – $7,500
94-97% $7,000 – $10,500
6-10 90-93% $8,000 – $10,500
94-97% $11,000 – $15,000
11-15 90-93% $10,500 – $14,500
94-97% $14,000 – $18,500
16-20 90-93% $20,000 – $55,000
94-97% $45,000 – $80,000
20+ 90-93% $100,000+
94-97% $120,000+


High-efficiency gas boiler prices



Are high-efficiency gas boilers worth it?

High-efficiency gas boilers are worth it for their energy savings, lower fuel consumption, and reduced greenhouse gas emissions. They can save up to 50% on energy bills compared to older conventional boilers. However, they have higher upfront costs.

What is the maximum efficiency of a gas boiler?

The maximum efficiency of a gas boiler can reach up to 98.5% AFUE (Annual Fuel Utilization Efficiency). This level of efficiency is achieved by high-efficiency condensing boilers that capture and reuse heat from exhaust gases.

What is the life of a high-efficiency gas boiler?

The life of a high-efficiency gas boiler typically ranges between 15 to 20 years, depending on the quality of the boiler, maintenance, and usage conditions. Regular maintenance and proper usage can help extend the boiler’s lifespan.

How often should you clean a high-efficiency gas boiler?

It is recommended to clean a high-efficiency gas boiler at least once a year, or as per the manufacturer’s guidelines. Regular cleaning and maintenance help ensure optimal performance and prolong the boiler’s lifespan.


So, does a high efficiency gas boiler make sense for you? It all depends on your needs. If you use a lot of hot water and have an energy-efficient heating system in place, then it could be worth looking into. But if you don’t need to heat up your home or business very frequently, it might not be worth the investment unless money isn’t an issue for you. At the end of the day, it’s all about finding what works best for your specific situation! If you want to learn about the detailed parameters and prices of high-efficiency gas boiler, please contact us: at +0086 186-2391-5479.


contact fangkuai

Looking for boilers with sophisticated manufacturing, great quality?

Fangkuai boiler can always provide what you want.

About the author

About the author

Yunchong Shang

Yunchong is a seasoned boiler expert with over five years of hands-on experience in the boiler industry. He has expertise in various types of boilers, including fire-tube, water-tube, and steam boilers, while also staying up-to-date with the latest technological boiler.

Get your best price

Quickly compare 3 FREE quotes

  • Engineer quick quote
  • The overall delivery speed is fast
  • Financial choice
  • Low installation costs and cost savings
Get Quotes Now
It only takes 30 seconds
25 years+ of boiler R&D

25 years+ of boiler R&D

More than 20 innovative technologies