Best Boilers for Radiant Floor Heating: Top 5 Picks for Warm

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Written by: Mohammad Sameer

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Boilers are the heart of radiant floor heating systems. A radiant heating system, also known as hydronic floor heating, uses a water heater to provide efficient and even heat distribution throughout your house, ensuring a comfortable living space.

By using a hydronic radiant heating system, boilers warm the floors with hot water or steam, creating a cozy environment for you and your family to enjoy. The system relies on piping to distribute the heat effectively.

Hydronic radiant floor heating systems offer numerous benefits over traditional heating methods. These systems utilize a water heater or boiler replacement, such as an HR electric boiler, to provide efficient and comfortable heating for your home.

Unlike radiators or forced-air systems that rely on convection to heat the air, hydronic radiant floor heating directly warms the floors themselves using a water heater and piping. This type of heating system is an excellent choice for boiler replacement.

Hydronic floor heating, powered by a water heater or an HR combination electric boiler, provides a more consistent and gentle heat that is evenly distributed across the entire room. The vent ensures efficient circulation.

With an HR electric boiler and hydronic floor heating, you can say goodbye to cold spots and drafts commonly associated with other heating options. The HR combination electric boiler will provide the necessary BTU boiler power to keep your home warm and comfortable.

The hydronic system, powered by a combination electric boiler and water heater, ensures that the warmth radiating from the floors creates a pleasant atmosphere while also reducing energy consumption.

In this blog post, we will explore how water heaters, such as boilers, play a crucial role in radiant floor heating systems. Boilers are an excellent choice for achieving optimal comfort and efficiency in your home, as they provide the necessary heat output measured in BTU/hr.

Additionally, boilers are capable of powering other appliances like your iron, making them a versatile and practical choice for households.

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Benefits and Advantages of Boilers for Radiant Floor Heating

Benefits and Advantages of Boilers for Radiant Floor Heating

Energy Efficiency and Cost Savings

Boilers, with their high BTU/hr output, offer significant energy efficiency, making them an excellent choice for radiant floor heating systems. Whether you need to heat water for your water heater or power an iron, a boiler can provide the necessary heat.

These heater systems work by circulating hot water from a BTU boiler through pipes installed beneath the flooring, radiating heat evenly throughout the room. The iron pipes ensure efficient distribution, while the gal material guarantees durability.

Unlike traditional forced-air heating systems that rely on ductwork to distribute warm air, boilers provide direct heat transfer, resulting in minimal heat loss. This is especially beneficial when using a water heater or iron, as the high BTU/hr output ensures efficient heating.

This efficiency translates into lower energy consumption and reduced heating costs for homeowners using a water heater, HR combination electric boiler, or hr electric boiler. The use of these efficient heating systems can help save money on energy bills. Additionally, the use of iron can further enhance the energy efficiency of these heating systems.

Consistent Warmth Without Drafts or Cold Spots

One of the key advantages of using Laars boilers for radiant floor heating is the consistent warmth they provide without any drafts or cold spots. With their high BTU/hr output, Laars water heaters ensure efficient and reliable heating for your home.

Traditional heating methods often result in uneven temperature distribution within a room, leading to discomfort and wasted energy. With the use of a water heater or an HR combination electric boiler, this issue can be resolved.

By installing an HR electric boiler, the temperature distribution will be more even throughout the room, providing greater comfort and saving energy. Additionally, the high BTU output of the HR electric boiler ensures efficient heating.

However, with radiant floor heating powered by water heaters and boilers such as HR and Laars, the entire floor surface becomes a source of gentle and even heat, measured in BTU.

Hydronic floor heating, powered by a water heater, eliminates any cold areas near windows or drafts caused by air vents, ensuring a comfortable environment throughout the space. This is made possible with the use of BTU and reliable Laars equipment.

Compatibility with Various Flooring Types

Radiant floor heating systems, including the Laars HR combination electric boiler and the HR electric boiler, are compatible with various flooring types, making them versatile options for homeowners.

Whether you prefer tile, hardwood, carpet, or even laminate flooring, these systems can be installed underneath without compromising their effectiveness.

Additionally, when it comes to heating your home, a water heater or a Laars BTU HR combination electric boiler can be a great choice. The heat from the water heater pipes transfers efficiently through different materials to warm up the room consistently.

The btu of the water heater ensures optimal heating performance. Laars water heaters are known for their reliability and efficiency.

This compatibility allows homeowners to choose their preferred flooring aesthetics while enjoying the benefits of radiant floor heating with a water heater, HR combination electric boiler, and HR electric boiler from Laars.

Reduced Allergens and Improved Indoor Air Quality

Unlike forced-air systems that blow air around the room, Laars boilers for radiant floor heating do not circulate dust particles or allergens in the same way. This is because they use water heaters instead of air heaters, which eliminates the need for air circulation.

The HR and BTU ratings of Laars water heaters ensure efficient and effective heating for your home. With no need for air ducts or vents that can accumulate dirt and debris over time, these water heater systems, such as the btu/hr combination electric boiler and the hr electric boiler, help maintain cleaner indoor air quality.

By reducing airborne allergens and dust circulation, a boiler-powered radiant floor heating system can be particularly beneficial for individuals with allergies or respiratory sensitivities.

This is especially true when paired with a high-efficiency water heater, such as the Laars model, which has a high BTU rating and can provide ample heat to the radiant floor system.

Quiet and Discreet Operation

Laars water heaters for radiant floor heating operate quietly and discreetly, enhancing the overall comfort of a space. These boilers have high BTU and HR ratings, making them an efficient choice for heating systems.

Unlike forced-air systems that can produce noticeable noise when the heater or air handler kicks in, boilers work silently to heat the water and distribute it through the pipes.

Boilers have a higher BTU rating compared to other heating systems, making them more efficient at heating large spaces.

This quiet operation of the combination electric boiler, with a BTU/hr electric boiler, is especially advantageous in bedrooms, living rooms, or other areas where peace and tranquillity are desired.

Comparison: Types of Boilers for Radiant Floor Heating Systems

Gas, oil, and electric boilers are the three main types commonly used for radiant floor heating systems. Additionally, a water heater can be used as a source of heat for radiant floor heating systems.

It is important to consider the BTU output of the water heater when determining its suitability for the system. Each type of water heater, including the BTU and HR combination electric boiler and the HR electric boiler, has its own set of advantages and considerations to keep in mind when selecting the right one for your needs.

Gas Boilers

Gas boilers are a popular choice for radiant floor heating due to their high efficiency and lower operating costs.

One of the key factors that make gas boilers an ideal option is their ability to provide hot water quickly and efficiently. With their high BTU/hr output, gas boilers can effectively heat water for radiant floor systems, ensuring a comfortable and cozy environment.

They use natural gas or propane as fuel to heat water, which is then circulated through pipes on the floor to provide warmth. These heating systems are measured in BTUs.

One of the key benefits of gas boilers is their energy efficiency. This is especially true for water heaters, which can produce a high BTU per hour.

They have a high Annual Fuel Utilization Efficiency (AFUE) rating, which indicates how effectively the hr combination electric boiler and hr electric boiler convert fuel into heat. These boilers are measured in BTU.

Gas boilers typically have AFUE ratings ranging from 80% to 98%, meaning that they can convert a significant portion of the fuel into usable heat, measured in BTU/hr.

In addition to their efficiency, gas boilers also offer faster heating response times compared to other types, thanks to their higher BTU (British Thermal Unit) output per hour.

This means that you can enjoy quick warmth when you need it without having to wait for the HR combination electric boiler system to reach optimal temperature.


  • High energy efficiency with AFUE ratings ranging from 80% to 98% is one of the key advantages of an HR electric boiler. This type of boiler is designed to provide efficient heating while minimizing energy waste. The high AFUE ratings ensure that a significant amount of the input energy is converted into usable heat, helping to reduce energy consumption and lower utility bills. With its ability to deliver efficient heating performance, an HR electric boiler is a great choice for those looking to maximize comfort and minimize energy costs. Additionally, the BTU output of an HR electric
  • Faster heating response times


  • Requires access to natural gas or propane supply
  • Installation may require professional assistance

Oil Boilers

Oil boilers are another option for radiant floor heating systems, providing efficient heating with their high BTU/hr output. These boilers use heating oil as fuel instead of natural gas or propane, providing a higher BTU/hr output.

While the HR electric boiler is reliable and can provide consistent heat, there are some considerations to keep in mind, such as the BTU.

One advantage of oil boilers is their durability and long lifespan. Oil boilers are capable of producing a high amount of BTU (British Thermal Units) per hour, making them efficient for heating purposes. With proper maintenance, an oil boiler can last for many years without any major issues.

The average lifespan of an oil boiler is around 15-20 years, and regular servicing by a qualified HR professional can help ensure its longevity. By keeping the boiler clean and well-maintained, you can maximize its efficiency and prevent any unnecessary breakdowns.

It’s also important to note that the heating capacity of an oil boiler is measured in BTU (British Thermal Units), which determines how much heat it can produce.

So, when choosing an oil boiler, make sure to consider the However, when it comes to oil boilers, regular maintenance is crucial, especially in terms of hr and btu. Cleaning and filter replacement are essential tasks that should not be overlooked.


  • Reliable performance
  • Long lifespan with proper maintenance


  • Requires regular maintenance
  • Higher operating costs compared to gas boilers

Electric Boilers

Electric boilers, measured in BTU/hr, are the third type of boiler commonly used for radiant floor heating systems.

These electric boilers use electricity as their power source to heat water for circulation through the floor pipes, providing efficient and reliable heating with a high BTU output.

One advantage of electric boilers is their simplicity and ease of installation. Electric boilers provide efficient heating with a high BTU output and can heat a space quickly. Additionally, they are easy to install and require minimal maintenance.

They do not require a fuel supply or venting, making the HR electric boiler a convenient option for certain applications. Additionally, the HR electric boiler provides efficient heating with its high BTU output.

Electric boilers tend to have fewer moving parts, resulting in reduced maintenance needs.

These boilers are efficient and can produce a high BTU output, providing ample heat for various applications. With their streamlined design, electric boilers offer reliable performance and require minimal HR attention.

Weil-McLain CGI Series Gas Boiler

The Weil-McLain CGI Series is a top-rated gas boiler for radiant floor heating, providing efficient heating and comfort in any space.

With its high HR rating and powerful BTU output, it delivers exceptional performance and warmth.

The HR electric boiler is known for its exceptional performance and durability, making it an excellent choice for homeowners looking to install a reliable heating system.

With its high BTU output, this boiler provides efficient and effective heating for your home.

Exceptional Performance and Durability

One of the standout features of the Weil-McLain CGI Series gas boiler is its exceptional performance, measured in BTU/hr. It is designed to provide efficient and consistent heat throughout your home, ensuring maximum comfort during the colder months.

With its high BTU output, this heating system will keep your home warm and cozy all winter long. The stainless steel burner in this boiler allows for precise control over the heat output, resulting in optimal energy efficiency of btu/hr.

In addition to its performance, the Weil-McLain CGI Series, with its durable construction, is an excellent choice for those in need of a reliable and long-lasting HR electric boiler. With its high BTU output, it can efficiently heat any space.

Its cast iron construction ensures longevity and resistance to wear and tear, making it an ideal choice for a high BTU/hr electric boiler. This means that you can rely on this boiler to provide reliable heating for years to come without worrying about frequent repairs or replacements.

With its high BTU output and efficient heat recovery, this boiler will keep your space warm and comfortable throughout the day.

Advanced Features

The Weil-McLain CGI Series gas boiler has advanced features that enhance its overall functionality and convenience. With a high BTU/hr rating, this boiler delivers efficient heating performance.

These features, including its reputation as a top-rated option for radiant floor heating systems, make the HR electric boiler an excellent choice. With its high BTU output, it provides efficient and reliable heating for any space.

  • The stainless steel burner improves heat control and enhances the overall efficiency of the boiler by increasing the btu/hr.
  • Cast Iron Construction: The cast iron construction adds strength and durability to the unit, allowing it to withstand high temperatures and pressure. This is especially important for an electric boiler, which typically operates at a high BTU output per hour.
  • Venting Options: This gas boiler offers multiple venting options, providing flexibility during installation. With a high BTU/hr rating, this boiler is capable of efficiently heating large spaces.
  • The integrated control system for the HR electric boiler enables homeowners to conveniently adjust settings and monitor performance, ensuring optimal comfort and energy savings. With this system, users can easily control the BTU output of the boiler.

Customer Satisfaction

Customers who have installed the Weil-McLain CGI Series gas boiler for their radiant floor heating systems have expressed high levels of satisfaction with its performance in terms of HR.

Many appreciate its reliability, noting that it consistently delivers comfortable warmth throughout their homes without any issues.

Furthermore, homeowners have praised the exceptional durability of the Weil-McLain CGI Series HR electric boiler.

The HR electric boiler’s ability to withstand the demands of daily use and harsh conditions gives users peace of mind, knowing that their heating system will continue to operate effectively for years.

Weil-McLain CGI Series Gas Boiler for Radiant Heating

The Weil-McLain CGI Series is a highly efficient gas boiler specifically designed for radiant floor heating applications in the HR industry. With its advanced features, the HR electric boiler offers precise temperature control and optimal comfort levels for your home. Its compact design ensures efficient heating.

Precise Temperature Control

One of the key benefits of the Weil-McLain CGI Series gas boiler is its ability to deliver precise temperature control for HR purposes. This ensures that your radiant floor heating system operates at the perfect temperature, providing consistent warmth throughout your home.

Whether you prefer a cozy environment or need to adjust the temperature based on changing weather conditions, this boiler allows you to fine-tune the settings with ease using HR technology.

Compact Design for Easy Installation

The compact design of the Weil-McLain CGI Series gas boiler makes it an ideal choice for homes with limited space, especially for those in need of an efficient and reliable heating solution.

With its small footprint and high-performance features, this boiler is HR-approved and perfect for homeowners looking to maximize their available space without compromising on comfort and energy efficiency.

The HR electric boiler can easily fit into tight spaces such as utility rooms or basements, without compromising on performance or efficiency. This HR electric boiler makes installation hassle-free and convenient, saving you time and effort during the setup process.

Energy Efficiency

The Weil-McLain CGI Series gas boiler excels. The HR electric boiler is designed to maximize fuel savings while minimizing environmental impact.

The high-efficiency HR electric boiler combustion system ensures that every unit of fuel is utilized effectively, reducing energy waste and lowering your utility bills.

Durability and Reliability

Weil-McLain has a long-standing reputation in the HR industry for manufacturing durable and reliable heating systems, and the CGI Series gas boiler is no exception. Built with quality materials and innovative engineering techniques, this HR boiler is built to last.

You can have peace of mind knowing that your radiant floor heating system, powered by an HR electric boiler, will provide reliable warmth for years to come.

Versatility in Applications

In addition to radiant floor heating, the Weil-McLain CGI Series gas boiler can also be used for other hydronic heating applications. It is compatible with various heat distribution systems, including baseboard radiators and fan coils, providing versatility in how you choose to heat your home. This flexibility allows you to customize your heating system based on your specific needs and preferences.

Closed System Example for Radiant Floor Heating

A closed system is an essential component of boilers used for radiant floor heating. It offers several advantages that help ensure the efficient operation of the system and minimize potential issues. Let’s explore some key aspects of a closed system and how it works.

Prevents Corrosion Risks

One of the primary benefits of a closed system is that it prevents oxygen from entering the boiler water. This is crucial because oxygen can cause corrosion within the system, leading to damage and reduced efficiency over time. By keeping the boiler water isolated from external sources, a closed system significantly reduces the risk of corrosion.

Expansion Tank Accommodates Changes in Water Volume

In a closed system, an expansion tank plays a vital role in accommodating changes in water volume due to temperature fluctuations.

As water heats up, it expands, increasing its volume. Without an expansion tank, this increased pressure could lead to stress on the pipes and other components of the heating system.

The expansion tank acts as a buffer by absorbing excess pressure caused by expanding water. It allows for proper circulation while preventing any potential damage or failure due to excessive pressure build-up.

The Circulator Pump Ensures Proper Water Circulation

Another critical component of a closed system for radiant floor heating is the circulator pump. This pump ensures that hot water circulates properly throughout the entire system, delivering heat evenly to all areas with radiant floor heating.

The circulator pump creates flow within the closed-loop piping network, pushing hot water from the boiler through supply lines into different zones or rooms where radiant heating is installed. Simultaneously, it draws cooler return water back to be reheated by the boiler.

This continuous circulation ensures consistent heat distribution and optimal performance of your radiant floor heating system.

To summarize:

  • A closed system prevents oxygen from entering the boiler water, reducing corrosion risks.
  • An expansion tank accommodates changes in water volume due to temperature fluctuations.
  • A circulator pump ensures proper circulation of hot water throughout the system.

By implementing a closed system for your radiant floor heating, you can enjoy efficient and reliable heat distribution while minimizing the risk of corrosion and other potential issues. It’s an essential consideration when choosing a boiler for this type of heating application.

How Hot Water Radiant Heat Works

How Hot Water Radiant Heat Works

Radiant heat is a type of heating system that transfers warmth directly from the heated floors to objects in the room through infrared radiation. This method creates a comfortable environment by allowing the heated objects to radiate heat back into the space.

One common application of radiant heat is in floor heating systems, where hot water is circulated through pipes embedded in the floor.

The concept behind hot water radiant heat is quite simple. The system uses a water heater or boiler to heat water, which is then pumped through a network of pipes installed beneath the floor.

As the hot water flows through these pipes, it warms up the floor surface, creating a cozy and even distribution of heat throughout the room.

One advantage of using hot water for radiant heating is its ability to provide consistent and efficient warmth. Unlike forced-air systems that blow heated air into a room, radiant heat does not rely on moving air.

Instead, it relies on direct contact with warm surfaces. This method eliminates temperature stratification commonly found with forced-air systems and ensures an evenly heated space.

Another benefit of hot water radiant heating is its energy efficiency. Since water has high thermal conductivity, it can retain and transfer heat effectively. This means that less energy is required to maintain a comfortable temperature compared to other heating methods.

Because radiant heat warms objects rather than just the air, it can create a more long-lasting feeling of warmth even after the system has been turned off.

Hot water radiant heating systems are also versatile and can be used for various applications beyond just floor heating. They can be integrated into walls or ceilings as well, providing warmth wherever needed.

Furthermore, since no ductwork or vents are required for installation, this type of heating system offers greater flexibility in terms of design and layout options for both new constructions and retrofits.

Choosing the Right System: Boiler or Water Heater for Radiant Floor Heating

You have two main options: boilers and water heaters. Both serve the purpose of providing hot water for your radiant floor heating, but they differ in their design and functionality. Let’s explore these options further to help you make an informed decision.

Boilers are specifically designed for radiant floor heating systems.

Boilers are purpose-built to meet the demands of radiant floor heating systems. They are designed to efficiently heat water and distribute it through a network of pipes installed beneath your floors.

These pipes radiate heat upward, warming the entire room evenly from the ground up. Boilers can generate higher water temperatures than traditional water heaters, ensuring optimal performance for your radiant floor system.

Water heaters may not provide sufficient heat output for larger areas.

While water heaters can also supply hot water for radiant floor heating, they may not be suitable for larger areas or homes with multiple zones.

Water heaters typically have lower BTU (British Thermal Unit) outputs compared to boilers, which means they might struggle to meet the heating demands of larger spaces effectively.

If you have a spacious home or plan on dividing your radiant heat into different zones, a boiler would be a more suitable choice.

Consider factors like efficiency, capacity, and compatibility with your existing setup when choosing between a boiler and a water heater.

To make an informed decision between a boiler and a water heater for your radiant floor heating system, consider several crucial factors:

  1. Efficiency: Boilers tend to be more energy-efficient compared to standard tank-style water heaters. They offer better fuel utilization and can help reduce energy costs over time.
  2. Capacity: Evaluate the size and capacity requirements of your home before making a choice. Larger homes or those with multiple zones may benefit from the higher output capacities provided by boilers.
  3. Compatibility: Assess whether your existing setup is compatible with either a boiler or water heater. Consider factors such as space availability, plumbing infrastructure, and electrical requirements.

5 Best Boilers for Radiant Floor Heating

The Weil-McLain Ultra Series is a top contender in the market for boilers suitable for radiant floor heating. These high-efficiency condensing boilers feature modulating burners, allowing them to adjust their heat output based on the needs of your radiant floor system.

This ensures optimal comfort and energy efficiency, as the boiler can provide just the right amount of heat to keep your floors warm without wasting energy.

Navien NHB Series is another excellent option. These compact and energy-efficient boilers are designed specifically for residential use and are well-suited for small to medium-sized homes.

The NHB Series boasts an impressive turndown ratio, which means it can operate at lower firing rates when less heat is needed, further maximizing energy savings.

If you’re looking for advanced control features and exceptional performance, Lochinvar Knight XL is worth considering. This boiler offers precise temperature control and modulation capabilities, ensuring consistent warmth throughout your home’s floors.

The Knight XL also incorporates smart technology that allows you to monitor and adjust settings remotely via a mobile app, providing convenience and flexibility.

In addition to these options, two more notable boilers deserve mention:

  1. Viessmann Vitodens 100-W: This boiler delivers reliable performance with its stainless steel heat exchanger and modulating MatriX cylinder burner. It offers quiet operation and high efficiency, making it an ideal choice for radiant floor heating systems.
  2. Buderus GB142: With its durable construction and low emissions design, the Buderus GB142 is a reliable option for radiant floor heating applications. It features a modulating burner that adjusts its output based on demand, ensuring efficient operation while maintaining comfort.

When choosing a boiler for radiant floor heating, it’s important to consider factors such as efficiency ratings, reliability, ease of installation and maintenance, and compatibility with your specific heating system.

Consulting with a professional HVAC contractor can help ensure you select the right boiler for your home’s needs.

Maximizing Comfort and Efficiency with Boilers

We have discussed various types of boilers available for these systems, including the Weil-McLain CGI Series Gas Boiler, which is specifically designed for radiant heating.

We have also delved into how hot water radiant heat works and provided insights on choosing the right system for your needs.

By opting for a boiler system for your radiant floor heating, you can experience superior comfort and efficiency in your home. Boilers offer consistent warmth throughout the space, eliminating cold spots commonly found with other heating methods.

They provide excellent energy efficiency by utilizing hot water to transfer heat effectively.

To maximize your comfort and efficiency further, consider investing in one of the top-rated boilers for radiant floor heating that we have highlighted in our blog post.

These boilers are known for their reliability, performance, and durability. With proper installation and maintenance, they can ensure years of efficient operation while keeping your home cozy during colder months.


Are boilers suitable for all types of flooring?

Boilers are compatible with various flooring materials such as tile, concrete, laminate, and hardwood. However, it’s important to consult with a professional installer to determine if your specific flooring type is suitable for use with a boiler system.

Can I use a boiler system if I already have an existing heating system?

Yes! Boilers can be integrated into existing heating systems or used as standalone units for radiant floor heating purposes. A professional HVAC technician can assess your current setup and recommend the best approach to incorporate a boiler system seamlessly.

How long do boilers typically last?

The lifespan of a boiler depends on several factors such as usage patterns, maintenance practices, and overall quality of the unit. On average, well-maintained boilers can last anywhere from 15 to 30 years. Regular servicing and inspections can help prolong the life of your boiler.

Are boilers energy-efficient?

Yes, boilers are known for their energy efficiency. They operate by heating water and distributing it through pipes to radiators or underfloor heating systems, providing consistent warmth without significant heat loss. This method of heat transfer is more efficient compared to forced-air systems.

Can I install a boiler system myself?

Boiler installation requires specialized knowledge and expertise. It is recommended to hire a professional HVAC technician who is experienced in installing boiler systems to ensure proper setup, safety, and optimal performance. Attempting a DIY installation may result in subpar performance and potential safety hazards.

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About Mohammad Sameer

My name is Mohammad Sameer, the founder of SoundproofGears. My hypersensitive hearing turned me into a lifelong seeker of silence. After years of research, I've become an expert on soundproofing techniques and materials. In November 2022 I launched this site to share my knowledge and help others find acoustic sanctuary. About More