Is Electric Underfloor Heating Expensive to Run

Electric underfloor heating has become an increasingly popular choice for homeowners across the UK who want a modern and efficient way to warm their homes. The appeal is clear. It provides a consistent and comfortable level of warmth underfoot, removes the need for bulky radiators, and can be installed in a wide range of properties. However, one of the most common concerns is the running cost. Many people ask whether electric underfloor heating is expensive to run and how it compares with other heating systems. The answer depends on several factors including property size, insulation levels, usage patterns, and the type of installation.

How Electric Underfloor Heating Works

Electric underfloor heating, also known as a dry system, uses a network of heating cables or mats installed beneath the floor surface. When switched on, electricity passes through the elements and gently warms the floor, which in turn radiates heat upwards into the room. Unlike radiators that heat the air unevenly, underfloor heating provides a steady and consistent warmth across the space. Because of this efficiency, many homeowners find it more comfortable and sometimes more cost effective in certain rooms, particularly smaller areas such as bathrooms and kitchens.

Average Running Costs

On average, electric underfloor heating can cost between £10 and £20 per square metre per month if used for around four to five hours a day, though this figure can vary widely depending on energy tariffs and insulation quality. For a small bathroom of about three square metres, the cost may be only a few pounds each month, which is relatively modest. However, for larger spaces such as an open plan living room, the running costs can rise significantly if the system is used as the primary heating source. The key factor is not just the size of the area, but also how well insulated the property is and whether the system is used for background warmth or as the main source of heat.

Energy Efficiency and Usage Patterns

Electric underfloor heating is very efficient at turning electricity into heat, with virtually no energy wasted in the process. However, the cost effectiveness of the system relies heavily on usage patterns. If it is left running for long hours in poorly insulated rooms, the costs will inevitably climb. On the other hand, if it is used selectively in certain areas with a good quality thermostat and timer, it can be highly economical. Many homeowners choose to use electric underfloor heating in rooms where they want extra comfort, such as a bathroom during winter mornings, rather than relying on it throughout the entire property.

The Role of Insulation

Insulation plays a critical role in determining how expensive electric underfloor heating is to run. Well insulated floors, walls, and windows help to keep the heat in, which reduces the amount of time the system needs to operate. Without good insulation, heat will escape quickly and the system will need to work harder to maintain a comfortable temperature, leading to higher energy bills. Many modern installations include insulation boards beneath the heating mats, which improve efficiency and shorten warm up times.

Comparing to Other Heating Systems

When compared to water based underfloor heating, known as a wet system, electric systems are generally more expensive to run. This is because water systems can be connected to energy efficient boilers or heat pumps, making them more suitable for whole house heating. However, electric systems are often cheaper and easier to install, especially as a retrofit option, and can be very cost effective when used for specific rooms. When compared with traditional radiators powered by gas central heating, electric underfloor heating may be more expensive in terms of running costs, but many homeowners are willing to pay for the added comfort and aesthetic benefits.

The Impact of Energy Prices

Electricity is typically more expensive per unit than gas, which is why electric heating is often viewed as costly. With energy prices fluctuating in recent years, this has become an even greater concern for households. The overall expense of running electric underfloor heating will largely depend on your tariff. Those with off peak electricity rates can make significant savings by scheduling the system to heat during cheaper hours. Smart thermostats and timers can be used to optimise usage and reduce unnecessary energy consumption.

Longevity and Maintenance Costs

Another point worth considering is that electric underfloor heating requires very little maintenance once installed. Unlike boilers and radiators, there are no moving parts that need regular servicing, which can reduce long term costs. The heating mats and cables are generally designed to last for decades if installed correctly. This means while the running costs are important, the lack of ongoing maintenance can help offset some of the expense.

Practical Examples

To put the costs into perspective, consider a bathroom with four square metres of electric underfloor heating running for two hours in the morning and two hours in the evening. At an average electricity cost of 30 pence per kWh, this might cost around £12 to £15 per month. In contrast, heating a larger living room of 20 square metres for the same period could cost £50 or more each month. This demonstrates why electric underfloor heating is often best suited for targeted areas rather than whole house heating.

Conclusion

So, is electric underfloor heating expensive to run? The answer is that it can be, particularly if used as the main source of heating across a large property. However, when installed with proper insulation and used strategically in specific rooms, it can be an efficient and affordable way to enjoy greater comfort in the home. Advances in smart controls, insulation technology, and energy tariffs also mean that homeowners have more ways than ever to keep costs under control. Ultimately, the running expense will depend on how you choose to use it, and with careful planning it need not be prohibitively expensive.