Updated: 17 September 2025

How to Get More Heat From Your Radiators

By: Andrew Bevan
Andrew Bevan
Head Copywriter

According to Ofgem.gov.uk, between 1 April and 30 June, the energy price cap will be set at £1,849 per year for a typical household who uses electricity and gas and pay by Direct Debit.

This is a rise of 6.4% from the cap set between 1 January and 31 March, which was £1,738.

With a significant energy increase on the cards, many will start thinking about how to get more heat from their radiators.

After all, the gas unit rate is set to increase from 6.34 pence per kWh to 6.99 pence, while the daily standing charge will slightly increase from 31.65 pence to 32.67 pence.

So, what can you do to get more heat from your radiators?

Getting More From Your Radiators

There are several tasks you can start doing today to maximise your radiator heat output, which includes the following:

Maintenance

Keeping your radiators well-maintained and in working condition ensures they work as efficiently as possible.

Maintenance tasks, including:

These tasks are simple for most homeowners.

Let’s discuss briefly what these tasks entail:

Bleeding Radiators

Air can creep into your home’s heating system and get trapped inside radiators. Over time, this can form air pockets, preventing the radiators from heating correctly or forming blockages.

Bleeding your radiators prevents these air pockets from forming. By allowing air to escape, the hot water circulates more effectively.

Cleaning Radiators

Dust and dirt will accumulate on radiators over time, which reduces their ability to emit heat. Regularly wipe them down, and clean any areas you can reach with a vacuum cleaner or cloth.

Checking For Leaks

Signs that your home’s heating system leaks are if it needs to be repressurised regularly.

Other strong indicators that there’s a leak are:

  • Puddles
  • Damp area
  • Dripping water
  • Strange noises
  • Corrosion
  • Increase in water bills
  • And finally, your home’s radiators are not heating properly.

Balancing Radiators

Balancing your radiator system ensures that each radiator in the house gets an equal hot water supply.

You can complete this task yourself. When done correctly, it can prevent cold spots in certain rooms and ensure the system works efficiently.

When you balance your radiators, you may discover they are blocked with debris or sludge. In this case, you should call a professional to perform a power flush.

A power flush is a deep cleaning process to remove sludge, rust, and debris from a central heating system, typically in homes and commercial buildings.

Another task you can perform is to check the heating system’s pressure. The efficiency of your home’s heating system is directly linked to its pressure level.

Most boiler manufacturers recommend keeping the pressure between 1.5 and 2 bar. If your system operates outside this range, it will operate inefficiently.

Performing these tasks will help keep your heating system and radiators working efficiently.

However, you can do a few additional hacks to ensure you get more heat from your radiators.

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General Hacks To Increase Heat

There are general hacks you can do to help your radiators increase their heat output and include the following:

Install Radiator Reflectors

Radiator reflectors are usually easy to install and fit and are easily found at most hardware outlets.

For those not entirely sure what radiator reflectors are, they are foil sheets that are placed behind radiators on exterior walls.

Radiator reflectors can better redirect heat into the room when properly installed, reducing heat loss. The University of Sheffield tested a 0.5mm radiator reflector and estimated that the solution could reduce heat loss through the wall by up to 60%.

Don’t Block Radiators

Ensuring your radiators aren’t blocked by couches, beds, or long curtains will allow heat to circulate effectively around a room.

Radiators work by convection, where hot air rises, circulates, and warms the room. If you plan on restyling your room, ensure there’s at least a 15 to 30 cm space between your radiators and items.

Install A Radiator Fan

While a radiator fan will not increase your unit’s efficiency, it will help circulate the heat better. Usually placed on the top or under the radiator, fans help move the warm air further into the room.

Currently, there are three types of radiator fans:

  1. Passive heat-powered fans (No Electricity) work like a stove fan, using heat from the radiator to power itself.
  2. Electric radiator booster fans need to be plugged in and actively distribute the warm air evenly.
  3. Smart radiator fans are like electric booster fans but can be controlled via Wi-Fi or smart home systems. They can adjust airflow automatically based on room temperature.

Improve Home Insulation

In the UK, insulation can significantly improve heat retention, saving up to 15% on heating and cooling costs and potentially reducing annual energy bills by up to £340 for a detached home.

Elements around the home that can improve from insulation are:

  • Piping
  • Walls
  • Loft insulation
  • Floor insulation
  • And installing double-glazing or thermal curtains

However, sometimes, the best method of increasing heat output from your home’s radiators is to replace them.

Installing a new radiator can be tricky, so call a professional Gas Safe registered engineer.

Call A Gas Safe Registered Engineer

WarmZilla can send a professional to your home, anywhere in the UK, within 48 hours for those struggling to increase their radiator heat output.

Our call centre professionals can assist those seeking clarification on a specific radiator heat output.

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About the Author

Andrew Bevan
Head Copywriter
Andrew is a Gas Safe Engineer who also writes about the boiler and home service industry. With years of hands-on experience under his belt, he now focuses on sharing his knowledge—and making his own tea.