Best electric blankets and heated throws UK 2026: heating the person, not the room

A radiator has to warm every cubic metre of air in a room before you feel any difference. An electric blanket warms the surface you are already touching. The end result feels similar, and the amount of electricity involved is not remotely similar, because the job is much smaller.

That is the case for buying one, and it stops there. A blanket is not central heating. It does nothing for the air you breathe, nothing for damp, and nothing for anyone who is not under it.

TL;DR

• The default for a bed: a fitted Silentnight underblanket in the right size.
• Sharing a double: a dual-control blanket, so each side has its own setting.
• For the sofa, not the bed: a Dreamland Relaxwell heated throw.
• More settings and a longer warranty: Beurer.
• Buy nothing you cannot wash. Filter for a machine washable electric blanket with a detachable controller.

Heating the person, not the room

The figures make the point without any arithmetic about bills. A plug-in fan heater or an oil-filled radiator is normally rated somewhere between 1,500 and 2,500 watts, because it is raising the temperature of a whole room of air. An electric underblanket for a single bed is typically well under 100 watts, and heated throws sit around the 100 to 120 watt mark. An order of magnitude apart, for the same result of feeling warm.

Two things widen the gap in practice. The blanket is in contact with you, so there is no air to warm first. And most models heat hard for a few minutes and then cycle to hold a temperature, so the average draw is below the headline rating.

None of that makes it a substitute for heating. The room stays cold, getting out of bed is still unpleasant, and condensation on the windows carries on as before. A cold damp room is the same problem seen from the other side, which is why a dehumidifier and a blanket solve different halves of a British winter.

Underblanket or heated throw

These two products get bought in place of each other constantly, and they are not interchangeable.

An electric underblanket lies flat on the mattress with your fitted sheet over it. It is built to be lain on, it has ties or elasticated corners so it does not ruck up, and it is sized to a bed.

A heated throw goes over you, usually on a sofa, usually fleece, and is sized like a blanket rather than a bed. It is not designed to be slept on under a sheet and it will not stay put on a mattress. If the hours you are cold are the evening on the sofa, the throw is the right product.

Washing and care

Most blankets and throws sold now are machine washable, and it is worth confirming that in the listing rather than assuming. The sequence matters: the controller unplugs first, then the textile goes in. The control unit never goes in water and never goes in the machine.

The rest of the rules are dull and not optional. Use the programme in the manual, not your usual one. Do not dry clean: solvents attack the wiring insulation. Do not tumble dry unless the manual allows it, and do not iron. Dry it flat and fully, and never plug it in while any part is damp.

Between seasons, roll it rather than folding it, and store it where nothing heavy sits on top. Every crease bends an element, and creases are what eventually breaks these things.

Safety

The rules are short and they matter. This is general product guidance, not medical advice.

• Never use one folded or creased. Folded fabric traps heat and stresses the element in the fold. It must lie flat, always.
• Check the manufacturer's guidance on sleeping with it on. Some models are designed for all-night use on a low setting and many are designed only for preheating. The instructions for your model are the answer; nothing else is.
• Replace an old or damaged one, do not repair it. Scorch marks, exposed wires, a frayed cable or uneven heating all mean the same thing. UK fire services advise replacing blankets after around ten years in any case.
• Buy one with overheat protection and automatic shut-off, and treat both as requirements rather than features.
• Take particular care with anyone who cannot feel heat properly or move away from it. Reduced sensation, reduced mobility, very young children, pets. Heat a healthy adult would shift away from can burn someone who cannot.
• Do not use one on an adjustable or reclining bed unless it says it is suitable, and keep it away from anyone using oxygen.

Silentnight Comfort Control Electric Blanket

The ordinary underblanket, and where most people should start. Elasticated straps, a small number of heat settings, a detachable controller, and single, double and king sizes; for a super king you are into Silentnight's Dual Control range. The limits are the obvious ones: few settings, no fine control.

Slumberdown Sleepy Nights Electric Blanket

The same idea with the one feature that matters in a shared bed. Dual-control versions split the blanket into two zones with a controller each, so one person runs it warm and the other low or off. Washable with the controllers removed. In a single bed it is pointless.

Morphy Richards Electric Blanket

The extra money buys control: more heat levels than the basic blankets, and on most versions a timer, so it preheats the bed and shuts off without you remembering. If you have ever woken up too hot under a blanket left on, that is the feature.

Dreamland Relaxwell Heated Throw

The sofa product. Fleece, sized as a throw rather than a bed, washable once the controller is out, normally with a shut-off timer. Do not buy it as bedding: it is not built to be slept on all night.

Beurer Heated Throw

Beurer makes medical devices, and the throws are specified accordingly: more heat levels, explicit overheat protection, automatic shut-off, warranties at the longer end of the category. Worth it for daily use over years, overspecified for the odd cold night.

Cosi Home Heated Throw

One of the larger throws on Amazon UK, wide enough for two people on a sofa. The catch is the single controller: two people, one temperature. Fine when you both want the same thing, annoying when you do not.

Things the box doesn't tell you

• Bed size is not one number. UK single is 90cm wide, double 135cm, king 150cm, super king 180cm. A blanket sold for a double is 15cm too narrow for a king. Search the size you actually own, not the one you assume.
• Deep mattresses defeat elastic corners. With a thick mattress or a topper, look for tie straps rather than skirted corners, or the blanket rides up in the night.
• Cable length and socket position. Throws get bought and then found to be tethered to a plug on the wrong side of the room. Measure from the sofa to the socket.
• Heat zones are not the whole blanket. Many underblankets heat the torso and foot area and leave a margin cold. That is normal, not a fault.
• Timers are not all the same. Some shut off after a fixed period, some let you choose, some only drop to a lower setting. Read which one you are getting.
• It is one more thing to store. Rolled, not folded, six months a year.

The decision is smaller than the listings make it look. Work out whether you are cold in bed or on the sofa, buy the product built for that, match it to the real size of your bed, check it washes and the controller comes off, and take dual controls if someone sleeps next to you. Then use it for what it is: one person kept warm on a fraction of the power a heater needs, in a house that is still cold.