A radiator booster fan sits on top of a radiator and pushes the warm air it gives off out into the room, instead of letting it rise straight to the ceiling.
Prices checked on Amazon UK, 27 October 2026.
A radiator booster fan sits on top of a radiator and pushes the warm air it gives off out into the room, instead of letting it rise straight to the ceiling. The idea is that the room reaches your thermostat setting sooner, so the boiler can switch off earlier. They use little power (the TEOV listing, for example, quotes under 3W) and most switch themselves on automatically once the radiator gets warm. This guide compares rechargeable and plug-in models, from short single fans to an 81cm bar for long radiators, with power, modes, sizes and noise taken from each Amazon UK listing. Any heating saving percentages quoted on listings are the sellers' own claims, not something we have measured. We found 8 radiator booster fans in stock on Amazon UK with a live buy-box price when we checked on 27 October 2026. Our overall pick is the Smart Air BOOST Radiator Fan at £48.99, the budget pick is the Coopers of Stortford Rechargeable Radiator Fan Heatboost Pro at £29.99, and our pick for a long radiator is the Smart Air BOOST XL Radiator Fan at £69.99. Prices and stock change often, so check both on Amazon before you buy.
Quick comparison
| Product | Price | Best for | Power | Speeds / modes | Auto switch-on (listing) | Size (listing) | Noise (listing) |
|---|---|---|---|---|---|---|---|
| Smart Air BOOST Radiator Fan | £48.99 | Corded or cordless | Mains or battery (up to 14h) | Manual/auto | Heat sensor | 41cm wide | – |
| Coopers of Stortford Rechargeable Radiator Fan Heatboost Pro | £29.99 | Lowest price | Rechargeable | Auto | 33°C | 31.5cm wide | – |
| Smart Air BOOST XL Radiator Fan | £69.99 | Long radiators | Rechargeable | Manual/auto | Intelligent sensor | 81cm long | – |
| MERTTURM Smart Radiator Fan Booster with Timer | £38.99 | Timer and 4 speeds | Corded (USB-C) | 4 speeds + auto, timer | Above 28°C | – | – |
| SURAIELEC Radiator Fan Booster with 3 Fans, 5200mAh | £39.99 | Cordless with display | Rechargeable 5200mAh, USB-C | 3 speeds + auto | Auto mode | – | – |
| AMSKA Radiator Fan Heat Circulation Booster | £47.00 | Single and double radiators | – | 3 speeds, auto/manual | When radiator heats up | – | – |
| TEOV Radiator Fan Booster with Auto Mode | £55.99 | Mid-length radiators | Corded, under 3W | 3 speeds + auto | Auto mode | 65.4cm wide | – |
| SpeedComfort Radiator Fan Booster Duo Set | £74.95 | Quietest by listing | Mains 12V adapter | Auto | On 33°C, off 25°C | For 70–120cm radiators | 20 dB(A) |
Specs from each Amazon UK listing (– = not stated on the listing); prices checked on Amazon UK on 27 October 2026.
Our picks
Smart Air BOOST Radiator Fan
Smart Air BOOST Radiator Fan
£48.99
Best overall
Coopers of Stortford Rechargeable Radiator Fan Heatboost Pro
Coopers of Stortford Rechargeable Radiator Fan Heatboost Pro
£29.99
Best budget
Smart Air BOOST XL Radiator Fan
Smart Air BOOST XL Radiator Fan
£69.99
Best for families
How we pick
We shortlist products sold on Amazon UK using capacity, features, customer ratings and price band. We do not lab-test every model unless a page says so. The Amazon page is the live price. How we recommend.
Compare at a glance
| Product | Last Amazon price | Buy |
|---|---|---|
|
£48.99
|
||
|
£29.99
|
||
|
£69.99
|
||
|
£38.99
|
||
|
£39.99
|
||
|
£47.00
|
||
|
£55.99
|
||
|
£74.95
|
The products
Buying advice
Our top picks
Best overall: Smart Air BOOST Radiator Fan (£48.99). The original SmartAir BOOST. The listing says it can run from the mains or its built-in power bank for up to 14 hours cordless, has a manual or automatic mode with a heat sensor, and fits double convector, tubular double and tubular single radiators. Listed size is 41cm wide.
Best budget: Coopers of Stortford Rechargeable Radiator Fan Heatboost Pro (£29.99). The cheapest booster here. The listing describes built-in turbo fans, automatic activation once the radiator reaches 33°C, a rechargeable lightweight design and a size of H11.5 x W31.5 x D11.5cm.
Best for long radiators: Smart Air BOOST XL Radiator Fan (£69.99). The longest fan here at 81cm, built for wide radiators. The listing says it heats a room twice as fast as the original BOOST (the seller's claim), uses multiple axial fans with sealed air funnels, has manual and automatic modes and is cordless and rechargeable.
Other radiator booster fans worth a look
MERTTURM Smart Radiator Fan Booster with Timer (£38.99). Uses a cross-flow fan that blows warm air horizontally into the room. The listing lists four speeds including a turbo setting, an auto mode that starts above 28°C, a 2 to 12 hour timer, a digital display, a magnetic fit and a USB-C port.
SURAIELEC Radiator Fan Booster with 3 Fans, 5200mAh (£39.99). A cordless three-fan booster. The listing says the 5200mAh battery gives 6 to 16 hours depending on speed, with three speeds, an auto mode that adjusts speed, a built-in temperature display and USB-C charging.
AMSKA Radiator Fan Heat Circulation Booster (£47.00). Has adjustable legs so it can sit on single or double radiators. The listing explains that in automatic mode the sensor switches it on as the radiator heats up and off as it cools, while manual mode keeps it running so it can double as a desk fan in summer.
TEOV Radiator Fan Booster with Auto Mode (£55.99). A longer plug-in booster at 65.4cm wide by listing dimensions. The listing quotes 280 CFM airflow, under 3W power, a rotary switch with off, auto and three manual speeds, an aluminium fan wheel and a temperature display.
SpeedComfort Radiator Fan Booster Duo Set (£74.95). A two-fan set for one radiator of 70 to 120cm, with one 12V power adapter. The listing quotes 20 dB(A), magnetic tool-free fitting, and a sensor that switches on at 33°C and off at 25°C. It is the quietest here by listed figures.
Rechargeable or plug-in?
Rechargeable fans such as the Coopers of Stortford (£29.99) and SURAIELEC (£39.99) are tidy, with no cable trailing down the wall, but need charging every so often. Plug-in models such as the TEOV (£55.99) and SpeedComfort (£74.95) run all season without charging, so plan where the cable will go.
The original Smart Air BOOST (£48.99) can do both: run it from the mains, or charge it and use it cordless.
Match the fan to your radiator
Measure the radiator's length and check the type. A short fan around 30cm suits a small radiator; for a long radiator, an 81cm bar such as the Smart Air BOOST XL (£69.99) or a two-fan set such as the SpeedComfort covers more of the length.
If you have a single-panel radiator, check the listing says it fits that type; the AMSKA (£47.00) has adjustable legs for single and double radiators. Our [radiator reflector panels guide](https://10deals.co.uk/posts/best-radiator-reflector-panels-uk-2026) covers a cheap fix for heat lost into the wall behind.
What to look for in a radiator booster fan
Automatic sensor. Most switch on when the radiator warms up; listings quote different trigger temperatures, from 28°C to 33°C.
Length. Compare the listed width with your radiator, and check whether one longer fan or two shorter ones suits it better.
Power. Rechargeable for no cables, plug-in for no charging, or a model that does both.
Noise. Few listings give a decibel figure; we show a dash where none is listed.
Fit. Check radiator type (single, double, convector) and the fixing method, such as feet, legs or magnets.
Savings claims. Percentages for faster heating or lower bills are the sellers' own figures.
How we chose these picks
We only included products that were in stock on Amazon UK with a single live buy-box price in pounds when we checked on 27 October 2026, read with a UK delivery address. We skipped listings showing low stock, no stock line or unclear details, and we avoided repeating products already featured in our other guides. Specs in the comparison table come from each product's Amazon UK listing, and a dash means the listing does not state that detail. Descriptions are based on what each listing says; we have not tested these products ourselves, and we have not used star ratings or review counts.
Prices were checked on Amazon UK on 27 October 2026 and can change at any time. Check the current price, details and delivery date on Amazon before you order.
Frequently asked questions
Do radiator booster fans work?
They move warm air from the radiator into the room rather than letting it rise to the ceiling first, which can help a room feel warm sooner. How much difference they make depends on the room and radiator; the saving figures on listings are the sellers' own claims.
Are radiator booster fans any good?
They are a low-cost add-on, from £29.99 in this guide, and use little power. They are most useful in rooms that are slow to warm up or where furniture or curtains stop warm air circulating. They do not add heat; they only move the heat your radiator already gives off.
Can you use a radiator booster fan on a single radiator?
Many can be used, but check the listing for your radiator type. In this guide, the AMSKA has adjustable legs for single and double radiators, and the Smart Air BOOST lists tubular single radiators among the types it fits.
Do radiator fans save money?
They can help if they let your thermostat switch the heating off sooner, but no saving is guaranteed. Running cost is low: the TEOV listing in this guide quotes under 3W; you can work it out as the power in kW multiplied by hours used multiplied by your unit rate.
