Retrofitting hydronic underfloor heating (UFH) involves installing a water-based heating system beneath the floor surface of an existing building. This type of heating system offers several advantages and follows a specific installation method.
Today in the next part of our weekly industry insight series Tony Croke, Product Manager for Indoor Climate Solutions in Wavin UK & Ireland, takes a look at the benefits and the method of retrofitting hydronic underfloor heating.
Hydronic systems operate at lower temperatures (around 30-50°C) compared to traditional radiators (60-70°C), making them more energy-efficient .
The even heat distribution reduces energy consumption, leading to lower heating bills over time. Hydronic systems are well-suited for integration with renewable energy sources, such as solar thermal panels and heat pumps, enhancing overall energy efficiency .
The system provides consistent and even heat distribution throughout the room, eliminating cold spots and creating a more comfortable environment .
Hydronic UFH systems produce radiant heat, which warms objects and people directly, rather than just heating the air.
Unlike forced-air systems, hydronic UFH does not circulate dust and allergens, leading to better indoor air quality. The system operates without exposed hot surfaces or sharp edges, reducing the risk of burns and injuries.
Since the system is installed under the floor, it frees up wall and floor space, allowing for more flexible interior design and furniture placement .
The absence of radiators improves the aesthetic appeal of the room and provides a clean, uncluttered look.
Homes with hydronic UFH are often more attractive to buyers, potentially increasing the property’s value and marketability.
Assess the existing floor structure, insulation, and heating system compatibility. Have a detailed pipe layout plan created, considering room usage, furniture placement, and zoning requirements. Calculate the heat load for each room to ensure the system meets the heating requirements.
Carefully remove the existing floor coverings to expose the subfloor. Ensure the subfloor is clean, dry, and level. Address any structural issues if necessary.
Lay insulation boards or panels to prevent heat loss and improve energy efficiency. This step is crucial to maximize the performance of the UFH system.
Lay the heating pipes according to the planned layout. Pipes can be secured using clips, staples, or a pre-grooved insulation board.
Design the pipe layout to create efficient heating circuits, ensuring even heat distribution.
Position the manifold, which will distribute water to the various heating circuits. The manifold should be easily accessible for maintenance.
Connect the heating pipes to the manifold, ensuring secure and leak-free connections.
Conduct a pressure test to check for leaks in the system. This step is essential to ensure the integrity and reliability of the installation.
For systems requiring a screed, pour a thin layer of screed over the pipes to encase them. Allow sufficient time for the screed to cure.
Once the screed is cured, install the final floor covering. Ensure compatibility with underfloor heating to avoid any issues with heat transfer.
Fill the system with water and purge any air from the pipes. Test the system to ensure it operates correctly and efficiently. Adjust the flow rates and temperatures as needed.
Perform a final inspection to ensure all components are correctly installed and functioning.
Educate the homeowner on how to operate and maintain the system for optimal performance.
Retrofitting hydronic underfloor heating offers numerous benefits, including improved energy efficiency, enhanced comfort, and better air quality. The installation process, while complex, can be effectively managed with careful planning and professional execution. By following the detailed method outlined above, homeowners can enjoy the many advantages of underfloor heating in their existing properties.