When upgrading a heating system, one of the key considerations is the choice of heat emitters. Both underfloor heating and radiators are widely used, each offering distinct advantages depending on the property, heating requirements, and personal preferences.
As air source heat pumps become increasingly popular in homes across Ireland, homeowners are paying closer attention to which heat emitter solution will provide the best balance of comfort, efficiency, and practicality.
Read more: How to Choose the Right Heat Pump for Your Self-Build Home
Radiators have long been a common heating solution in homes of all ages, while underfloor heating has grown in popularity due to its efficiency, even heat distribution, and discreet design. Selecting the most suitable option ultimately depends on your home’s layout, heat demand, and installation feasibility.
Underfloor Heating vs Radiators - Which option is better?
There is no universal answer; both systems can perform effectively when correctly specified and installed. A heat loss calculation should always be carried out to determine the required heat output and emitter size for each room.
Read more: The Importance of Correctly Sizing Your Heat Pump
In many homes, the best solution may involve a combination of both underfloor heating and radiators, depending on the layout of the property and heat demands of each room.
Low-temperature systems typically require a larger surface area to distribute heat efficiently. Underfloor heating meets this requirement by utilising the entire floor area as a heat emitter, making it particularly suitable for use with modern air source heat pumps. Alternatively, if underfloor installation is impractical, modern aluminium radiators provide an efficient and effective solution.
What is underfloor heating?
A wet underfloor heating system consists of a network of pipes embedded within the floor. Warm water circulates through these pipes, radiating heat evenly upwards into the room.
This approach provides a large heat-emitting surface, resulting in consistent temperature distribution and enhanced comfort. Additional benefits include:
- Even heat distribution across the entire space
- Improved system efficiency
- Minimal visual impact, as the system is concealed beneath the floor
- Compatibility with a range of heat sources, including boilers and heat pumps
Underfloor heating like the Grant Uflex system is particularly popular in self-build homes, extensions, and open-plan living spaces where homeowners want consistent heat distribution and minimal visual impact.
What is a radiator?
Radiators heat a room through convection. Warm air rises from the radiator, cools as it circulates, and then falls, creating a continuous airflow cycle. The Grant Afinia radiator range features aluminium radiators, which are highly responsive and heat up quickly. Aluminium radiators are also lightweight, energy-efficient, and well suited to low-temperature heating systems such as air source heat pumps. Their modern design can also complement a wide range of interior styles.
Many homeowners ask whether radiators can work efficiently with air source heat pumps. Modern aluminium radiators can perform very effectively when correctly sized for low-temperature heating systems.
Key Comparisons
Underfloor heating installation is more complex and involves several stages, including pipe layout, system connection, testing, and screeding. Proper design is essential to ensure even heat distribution, and floor height adjustments may be required depending on the system type.
Radiators, by contrast, are quicker and simpler to install. However, correct sizing and placement remain crucial to ensure effective performance and to avoid obstructions.
This can make radiators a practical option for renovation projects where floor height changes or major floor works are not desirable.
Running Costs and Efficiency
Both systems can operate efficiently when properly designed and controlled. Underfloor heating can offer lower running costs, particularly when paired with modern systems such as air source heat pumps. That said, efficiency depends on several factors, including system design, insulation levels, and the performance of the heat source itself. Underfloor heating typically performs best when operating continuously at a stable temperature rather than being frequently switched on and off.
Maintenance
Both underfloor heating systems and modern radiators require relatively little maintenance. Routine servicing of the overall heating system, boiler or heat pump should include checks to ensure heat emitters are functioning correctly.
Can you use both?
Yes, many homes successfully combine both systems. A common approach is to install underfloor heating on the ground floor, and radiators on upper levels. Some underfloor systems can also be adapted for upper floors, depending on the construction and chosen system.
A combined approach can provide flexibility throughout the home, allowing homeowners to balance comfort, efficiency, and installation practicality across different areas of the property.
Choosing between underfloor heating and radiators depends on several factors such as property type, room layout, heating requirements, installation considerations and preferred heat source.
When correctly designed and specified, both systems can work efficiently with modern air source heat pumps to provide comfortable, energy-efficient heating throughout the home.