How does water underfloor heating work? All you need to know this before installation
How does water underfloor heating work?
Water-based underfloor heating is a system where heat is distributed through a network of pipes carrying warm water beneath the floor surface. The water is heated by a central source, such as a gas boiler, oil boiler, solid fuel boiler, or heat pump, and then flows through the pipes, transferring heat to the room via the floor.
What you should know before installing water-based underfloor heating:
Planning and Design: Before starting the installation, it’s essential to carefully plan the layout of the heating pipes, considering the room arrangement and furniture placement to ensure even heat distribution.
Thermal Insulation: Proper floor insulation is crucial to prevent heat loss to the ground. Typically, rigid polystyrene is used as the insulating layer, on which polyurethane foam is laid to prevent stresses in the finished heating slab.
Material Selection: Special multi-layer pipes are used for underfloor heating installations, characterized by high durability and a lifespan exceeding 40-50 years. They are virtually maintenance-free, minimizing the risk of potential failures.
Heat Source: The underfloor heating system should be compatible with the chosen heat source. Combining underfloor heating with a heat pump is an ideal solution, allowing for significant operational cost reductions.
System Control: To effectively manage the temperature in individual rooms, it’s advisable to install room controllers and thermal actuators on the heating manifold, which control the flow of warm water in the individual underfloor circuits.
Before proceeding with the installation of water-based underfloor heating, it’s recommended to consult with an experienced installer who can assist in selecting the appropriate materials and ensure proper installation, leading to the system’s efficiency and longevity.
How to lay water underfloor heating?
Underfloor heating provides an efficient and comfortable method of warming spaces by distributing heat evenly across the floor surface. Proper installation is crucial to ensure optimal performance and longevity. Below is a step-by-step guide to installing a water-based underfloor heating system:
1. Planning and Design:
- Heat Source Compatibility: Ensure your existing boiler or heat pump is compatible with underfloor heating requirements.
- Zoning: Divide the property into heating zones to allow for independent temperature control in different areas, enhancing comfort and energy efficiency.
2. Floor Preparation:
- Subfloor Assessment: Ensure the subfloor is clean, level, and free from debris.
- Insulation Installation: Lay appropriate insulation material to prevent heat loss downward, ensuring efficient heat transfer to the room above.
3. Installing the Heating System:
- Fixing the Pipes: Secure the pipes to the insulation or a fixing system, maintaining consistent spacing as per the design specifications.
- Connecting to the Manifold: Connect the laid pipes to the manifold, which regulates water flow from the heat source.
4. Testing:
- Pressure Testing: Before covering the pipes, conduct a pressure test to identify any potential leaks or issues.
5. Floor Covering:
- Applying Screed: Once testing is successful, cover the pipes with screed or a suitable levelling compound, ensuring an even surface for the final floor covering.
- Final Flooring: After the screed has cured, install the chosen floor finish, ensuring compatibility with underfloor heating.
6. System Commissioning:
- Initial Heating: Gradually bring the system to the desired operating temperature to allow materials to acclimate and prevent thermal shock.
- Balancing: Adjust flow rates and settings to ensure even heat distribution across all zones.
It’s advisable to consult with or hire professional installers to ensure compliance with local building regulations and standards. Proper planning and execution will result in an efficient and comfortable heating solution for your space.
