Do radiator covers block heat?

Yes, all radiator covers will reduce the heat output to some degree (usually 10-15%). However, you can minimize this by ensuring there are large gaps at the bottom to draw in cold air and at the top to release warm air. Using a foil heat reflector on the wall behind the radiator can also help offset the loss.

How much space should be around a radiator in a cover?

We recommend a minimum of 25mm clearance on each side (total 50mm width) to accommodate the valves, 50mm clearance above the radiator for heat to rise, and 20mm clearance from the front face of the radiator to the grille.

Can I still use my TRV with a cover?

Thermostatic Radiator Valves (TRVs) detect the air temperature. When inside a cover, the TRV will 'think' the room is much hotter than it actually is and may shut off prematurely. You should consider using a remote sensor or adjusting the TRV to a higher setting to compensate.

Should I fix the cover to the wall?

Yes, especially if you have children or pets. Radiator covers are top-heavy and can be knocked over. Most covers come with small 'L' brackets that fix the top shelf to the wall while still allowing the cover to be lifted off for cleaning or maintenance.

Do radiator covers block heat?

Yes, all radiator covers will reduce the heat output to some degree (usually 10-15%). However, you can minimize this by ensuring there are large gaps at the bottom to draw in cold air and at the top to release warm air. Using a foil heat reflector on the wall behind the radiator can also help offset the loss.

How much space should be around a radiator in a cover?

We recommend a minimum of 25mm clearance on each side (total 50mm width) to accommodate the valves, 50mm clearance above the radiator for heat to rise, and 20mm clearance from the front face of the radiator to the grille.

Can I still use my TRV with a cover?

Thermostatic Radiator Valves (TRVs) detect the air temperature. When inside a cover, the TRV will 'think' the room is much hotter than it actually is and may shut off prematurely. You should consider using a remote sensor or adjusting the TRV to a higher setting to compensate.

Should I fix the cover to the wall?

Yes, especially if you have children or pets. Radiator covers are top-heavy and can be knocked over. Most covers come with small 'L' brackets that fix the top shelf to the wall while still allowing the cover to be lifted off for cleaning or maintenance.

Radiator Cover Sizing

Calculate internal and external dimensions for a safe fit.

Radiator Width (mm)

Note: Measure from valve to valve

Height (mm)

Depth (mm)

Material Thickness (mm)

Cover Dimensions

Heat Efficiency Tip: Radiator covers inherently reduce heat output by roughly 10-15%. To minimize this, ensure you have a large open grille area at the front and a clear gap at the top and bottom to allow **convection currents** to pull cold air in and push hot air out.

Style & Substance: The Radiator Cover Guide

Heat vs Aesthetics

Radiator covers are a fantastic way to hide unsightly metal radiators and add a useful shelf to a room. However, without the correct 'internal' sizing, you risk overheating your radiator and significantly reducing the efficiency of your heating system.

Our **radiator cover calculator** ensures you leave enough 'breathing room' for convection currents to work effectively, keeping your room warm while looking stylish.

10-15%

Average Heat Loss

Can be mitigated with proper venting and heat reflectors.

Measuring Valves

The most common mistake when measuring for a radiator cover is forgetting the valves. You must measure the **total width** from the outermost edge of the left valve to the outermost edge of the right valve.

If you have a Thermostatic Radiator Valve (TRV) that sticks out forward, you may need to increase the 'internal depth' requirement to ensure the cover doesn't press against it.

Convection Currents

Radiators work primarily through convection—drawing cold air from the floor and pushing warm air out the top. Your cover must have a clear gap at the bottom (usually achieved by the legs) and a vented or slotted top shelf.

Safety Clearance

While the cover surface itself remains relatively cool, the internal air is hot. Never place flammable items or sensitive electronics directly inside or too close to the vents of a radiator cover.

Pro Tip: Heat Reflective Foil

Before fitting your cover, stick a sheet of **heat reflective foil** to the wall behind the radiator. This reflects heat that would otherwise be absorbed into the wall back into the room, helping to offset the efficiency loss of the cover itself.

Radiator Cover FAQ

Project Disclaimer

Ensure the cover is stable and secured to the wall. Do not use radiator covers on storage heaters or electric radiators unless specifically stated by the manufacturer, as these can pose a significant fire risk if airflow is restricted.