Cheapest way to heat a room: 26.11p/kWh electricity

Finding the most cost-effective way to heat individual rooms is a priority for many households. Understanding how different heating methods work and how to maximise efficiency can help you stay warm without excessive energy bills.

To truly find the cheapest way to heat a room, you need clear information about your energy use and transparent pricing. Fuse Energy offers straightforward pricing and 24/7 human customer support, helping you make informed decisions about your home's energy. Click here to switch to Fuse Energy today.

Understanding your heating costs

To heat a room efficiently and affordably, you first need to understand the factors influencing your heating costs. These include the unit price of your fuel, the energy consumption of your heating method, and how well your room retains heat.

How energy prices affect room heating

The cost of heating is directly tied to energy prices. In the UK, the Ofgem energy price cap significantly influences the unit rates for electricity and gas, affecting the running costs of all heating methods. For the period 1 July to 30 September 2026, the average electricity unit rate under the Ofgem Price Cap is 26.11p per kWh. You can learn more about how these rates are set in our guide to the energy price cap explained. While gas central heating is generally considered the most cost-effective method for heating an entire home, electric options can be a more economical choice for heating individual rooms.

Calculating running costs per hour

Calculating the running cost of a heater is straightforward:

1. Find the heater's power rating in kilowatts (kW). If it's in watts (W), divide by 1,000.
2. Multiply the kW rating by your electricity unit rate (e.g., 26.11p per kWh).

For instance, a 2kW electric heater running for one hour at 26.11p per kWh would cost 52.22p (2kW x £0.2611). This calculation helps you compare the potential costs of different devices.

Cheapest electric heaters to run

When central heating isn't practical or economical for a single room, electric heaters offer a flexible alternative. Here are some of the most cost-effective options:

Oil-filled radiators

Oil-filled radiators are often considered one of the most economical electric heating options for sustained use. They work by heating oil sealed inside the unit, which then radiates heat into the room. They take longer to heat up but retain heat for a significant period after being switched off, making them efficient for maintaining warmth.

• Pros: Good heat retention, silent operation, portable.
• Cons: Slower to heat up, can be bulky.

Convection heaters

Convection heaters work by circulating warm air throughout a room. They heat up quickly and are effective for rapidly warming a space. While they don't retain heat as long as oil-filled radiators, their quick response time can be beneficial for intermittent use.

• Pros: Quick to heat a room, lightweight, portable.
• Cons: Heat dissipates quickly once turned off, can be less efficient for prolonged use.

Fan heaters

Fan heaters use a fan to blow air over a heating element, distributing warm air rapidly. They are excellent for instant, targeted heat and are often the cheapest to buy. However, they can be less efficient for heating an entire room for extended periods due to their higher running costs compared to other electric options.

• Pros: Instant heat, highly portable, inexpensive to purchase.
• Cons: Can be noisy, less efficient for long-term heating, can dry the air.

Infrared heaters

Infrared heaters work differently by directly heating objects and people in a room, rather than the air. This can make them feel warmer more quickly and efficiently, especially in draughty rooms or for targeted heating. They are often considered efficient because they don't waste energy heating air that might escape.

• Pros: Heats objects directly, effective in draughty areas, silent.
• Cons: Doesn't heat the air, can feel less ambient than convection heat.

Cheapest non-electric ways to heat a room

While electric heaters offer flexibility, other methods can also be cost-effective, especially if you're looking to supplement your heating or reduce electricity consumption.

Gas central heating for specific rooms

Although gas central heating is typically used for an entire home, it can be the cheapest way to heat specific rooms if you have thermostatic radiator valves (TRVs) installed. By turning down radiators in unused rooms and only heating the ones you occupy, you can leverage the lower unit cost of gas more efficiently. The average gas unit rate under the Ofgem Price Cap for 1 July to 30 September 2026 is 7.33p per kWh.

• Pros: Generally lower running cost per kWh than electricity, effective for larger spaces.
• Cons: Requires existing central heating system, less flexible for truly isolated room heating.

Portable gas heaters

Portable gas heaters, typically fuelled by liquefied petroleum gas (LPG) cylinders, can provide powerful heat quickly. They are useful for spaces without electricity or as a backup. However, they require good ventilation and the cost of gas cylinders can add up, making them less economical for daily use compared to mains gas.

• Pros: Powerful heat, no electricity needed, portable.
• Cons: Requires ventilation, fuel cylinders can be expensive, safety considerations.

Practical tips for cheaper room heating

Beyond choosing the right heater, several strategies can help you keep heating costs down:

• Insulate the room effectively: Seal draughts around windows and doors, use thick curtains, and consider draught excluders. Good insulation prevents heat from escaping, reducing the need for continuous heating.
• Use a timer and thermostat: Only heat the room when it's occupied and to a comfortable temperature. A thermostat prevents overheating, and a timer ensures the heater isn't running unnecessarily.
• Zone heating: Focus heat only on the rooms you are using. Close doors to unheated rooms to prevent heat loss from your occupied space.
• Monitor energy usage: Use smart meters or energy monitoring apps to track how much energy your heating methods consume. This insight helps you identify inefficiencies and make adjustments. You can also learn how to read your energy meter to keep track of your usage.

Finding the cheapest way to heat a room involves a combination of choosing the right heating method for your needs and implementing smart energy-saving practices. By understanding your options and optimising your usage, you can stay warm without breaking the bank.

Managing your home's energy should be clear and simple. Fuse Energy focuses on straightforward pricing, so you can see exactly what you're paying without unnecessary complexity. Our 24/7 human support team is always on hand with fast response times whenever you need help. Click here to switch to Fuse Energy today. Find out about our mission by clicking here.