How Much Does Underfloor Heating Cost to Run?

Underfloor heating is renowned for providing comfortable, evenly distributed warmth throughout your home. But one of the most common questions homeowners ask before installing a system is:

How much does underfloor heating cost to run?

The answer depends on several factors, including the type of system, energy prices, insulation levels and how the system is controlled. In this guide, we'll explain the typical running costs and how to maximise efficiency.

Is Underfloor Heating Expensive to Run?

Not necessarily.

Underfloor heating operates at lower temperatures than traditional radiators, making it highly efficient when correctly designed and installed. Wet underfloor heating systems, in particular, can be very economical to run, especially when paired with an air source heat pump.

Wet Underfloor Heating Running Costs

Wet underfloor heating circulates warm water through pipes beneath the floor and typically operates between 35°C and 45°C.

Because of these lower temperatures, it can work more efficiently than traditional radiator systems.

Typical running costs depend on:

Property size

Heat source (gas boiler or heat pump)

Insulation levels

Thermostat settings

Time of year

A well-insulated modern home with a heat pump and underfloor heating can offer excellent efficiency and lower energy consumption compared to older heating systems.

Electric Underfloor Heating Running Costs

Electric underfloor heating is often used in:

Bathrooms

En-suites

Kitchens

Small extensions

Although electric systems are cheaper to install, electricity generally costs more per unit than gas. This means electric underfloor heating is usually best suited to smaller areas or rooms that are only heated occasionally.

For larger spaces or whole-home heating, wet underfloor heating is typically more cost-effective in the long term.

What Affects Underfloor Heating Running Costs?

Home Insulation

Good insulation is one of the biggest factors affecting efficiency. Well-insulated homes retain heat longer, reducing energy consumption.

Floor Coverings

Tiles and stone provide excellent heat transfer, while thick carpets and underlays can reduce efficiency.

System Controls

Smart thermostats and zoning allow you to heat only the rooms you need, helping to reduce running costs.

Heat Source

Underfloor heating works exceptionally well with:

Air source heat pumps

Ground source heat pumps

Modern condensing boilers

Heat pumps are particularly effective due to the lower flow temperatures required by underfloor heating.

Is Underfloor Heating Cheaper to Run Than Radiators?

In many cases, yes.

Traditional radiators typically operate at temperatures between 65°C and 75°C, whereas underfloor heating runs at around 35°C to 45°C.

This lower operating temperature can improve efficiency and reduce energy usage when combined with a properly designed heating system.

However, the actual savings depend on:

Property insulation

Heat source efficiency

Heating controls

Occupancy patterns

How Can You Reduce Underfloor Heating Running Costs?

Here are some simple ways to maximise efficiency:

Use Smart Controls

Programmable thermostats help ensure rooms are only heated when needed.

Improve Insulation

Insulating floors, walls and loft spaces can significantly reduce heat loss.

Avoid Large Temperature Changes

Underfloor heating works best when maintaining a consistent temperature rather than being switched on and off frequently.

Pair It with a Heat Pump

Air source heat pumps and underfloor heating are considered one of the most efficient heating combinations available.

Is Underfloor Heating Worth It?

Many homeowners choose underfloor heating because it offers:

✅ Even, comfortable warmth

✅ Lower operating temperatures

✅ Increased energy efficiency

✅ More wall space without radiators

✅ Excellent compatibility with heat pumps

✅ Quiet, low-maintenance operation

While installation costs can be higher than radiators, the long-term comfort and efficiency benefits make underfloor heating a worthwhile investment for many homes.

Underfloor Heating Installation Across Liverpool, Wirral and Cheshire

At 21 Degree Heating, we design and install efficient underfloor heating systems for homes throughout Liverpool, Wirral, Warrington and surrounding areas.

Whether you're planning a new build, extension or renovation, our experienced team can recommend the right solution for your property and budget.

Get a Free Quote

Thinking about underfloor heating?

Contact 21 Degree Heating today for a free survey and expert advice on the best system for your home.