Water vs Electric Underfloor Heating – Which Is Best?
Thinking about installing underfloor heating but unsure whether to choose a water or electric system?
Both provide comfortable, even warmth and can be an excellent alternative to traditional radiators. However, installation costs, running costs, floor construction and the size of the area being heated can make one option more suitable than the other.
In this guide, we compare water vs electric underfloor heating to help you choose the right solution for your project.
Introduction
One of the most common questions when planning an underfloor heating project is whether water or electric underfloor heating is best.
The answer depends largely on your property and how you intend to use the system.
Water underfloor heating uses warm water circulated through pipes beneath the floor and is particularly well suited to whole-house heating, new builds, larger renovations and heat pump installations.
Electric underfloor heating uses heating cables or mats beneath the floor and can be an excellent solution for bathrooms, kitchens, extensions and individual rooms.
Both can provide excellent results when the system is correctly specified and installed.
Water Underfloor Heating
What is water underfloor heating?
Water underfloor heating – sometimes referred to as wet underfloor heating – circulates warm water through a network of pipes installed beneath the floor.
The pipework connects to a manifold, which distributes water around individual heating circuits. Separate thermostats can then control different rooms or zones throughout the property.
Why choose water UFH?
Because underfloor heating provides a large heat-emitting surface, rooms can be heated effectively using lower water temperatures than conventional radiator systems.
This makes a correctly designed water UFH system particularly suitable for modern, energy-efficient properties and air source or ground source heat pumps.
Electric Underfloor Heating
What is electric underfloor heating?
Electric underfloor heating uses electrical heating cables installed beneath the finished floor.
Systems are typically available as heating mats, where the cable is pre-spaced on a mesh backing, or loose heating cables, which provide greater flexibility for irregularly shaped rooms.
The system connects to a dedicated thermostat, allowing you to control when the floor heats and the temperature of the room.
Why choose electric UFH?
Electric systems can be relatively quick and straightforward to install and normally require very little additional floor height.
This makes them particularly attractive when renovating a single room or where installing a complete water-based heating system would not be practical.
Water vs Electric Underfloor Heating at a Glance
Not sure which option is right for you? Here’s how the two systems compare.
| Comparison | Water UFH | Electric UFH |
|---|---|---|
|
Heat Source Installation Running costs Whole-house heating Single-room heating New builds Renovations Heat pumps Low floor build-up Individual zone control |
Boiler or heat pump
More involved Better suited to prolonged & large area heating Excellent Good Excellent Excellent – retrofit options available Excellent – particularly well suited Good – low profile systems available Yes |
Electricty Generally simpler Better suited to smaller & occasional use areas Less suited Excellent Good Excellent Not applicable Excellent Yes |
The Simple Answer
Large area or whole property?
Water UFH will usually be the better option.
One bathroom, kitchen or individual room?
Electric UFH could be the simpler solution.
INSTALLATION & RUNNING COSTS
Which Is Cheaper to Install?
For smaller areas, electric underfloor heating will generally cost less to install initially.
Electric heating mats require fewer components and can be an attractive option when renovating an individual room.
Water UFH requires pipework, manifolds and associated controls, making installation more involved. However, when heating larger areas or an entire property, the additional initial investment can make considerably more sense.
Modern low-profile and retrofit water UFH systems have also made water-based heating much easier to incorporate into existing properties.
Which Is Cheaper to Run?
For larger areas and whole-house heating, water underfloor heating will generally be the more economical option to operate.
Actual running costs depend on several factors, including:
Property insulation
Heat loss
Energy tariffs
Floor construction
System design
Temperature settings
Heating schedules
Heat source
Electric UFH can still be an excellent choice for smaller areas where the heating is only required for limited periods.
WHICH SYSTEM FOR YOUR PROJECT?
Which Is Best With a Heat Pump?
WATER UFH ★★★★★
Water underfloor heating and heat pumps can make an excellent combination.
Heat pumps are designed to operate efficiently at relatively low flow temperatures. Because UFH distributes heat across a large floor area, it can provide comfortable room temperatures without requiring the higher flow temperatures traditionally associated with radiators.
Correct design is essential.
Pipe spacing, circuit lengths, floor construction, insulation and room heat losses should all be considered when designing a UFH system for a heat pump.
Which Is Best for a New Build?
WATER UFH ★★★★★
For most new-build properties, water underfloor heating is likely to be the preferred solution, particularly when heating the whole property.
Installing UFH as part of the original floor construction allows the system to be planned from the beginning.
This can provide an efficient, discreet heating solution while removing the need for wall-mounted radiators.
Which Is Best for a Renovation?
IT DEPENDS ON THE PROJECT
Renovating one bathroom or kitchen?
Electric UFH may be the simplest solution.
Renovating an entire ground floor or property?
A retrofit water UFH system could be more suitable.
Modern low-profile systems can significantly reduce additional floor build-up, allowing water underfloor heating to be installed in many existing properties where a traditional screeded system would not be practical.
Still Not Sure Which Underfloor Heating System You Need?
Choosing the right underfloor heating system isn’t simply about deciding between water and electric.
Your floor construction, property size, insulation, heat source, heat loss and required heat output should all be considered before choosing a system.
Let Hydaheat Help
With over 12 years of underfloor heating experience and more than 4,000 systems designed, Hydaheat can help you choose the right solution for your project.
Whether you’re a Homeowner • Installer • Developer • Self-Builder • Contractor, our team can provide expert product advice and technical support throughout your project.
Underfloor Heating Systems from Hydaheat.
Hydaheat supplies high-quality water and electric underfloor heating systems throughout the UK, with solutions suitable for new builds, renovations, extensions, residential properties and commercial projects.
Our range includes complete underfloor heating kits, manifolds, pipe, thermostats, controls, insulation, fixing systems and electric heating solutions.
With expert technical support, trade pricing and free CAD design available on qualifying water UFH orders, we can help you specify the right underfloor heating system for your project.
