Electric Blanket Buying Guide: What You Need to Know

The coldest weeks are still ahead of us and a small investment now could help you stay warm and save money until spring. But don't buy an electric blanket before you read our guide. We’ve got tips and advice that will ensure you don't waste money on the wrong one.

There are two main types of electric blanket.

The first – which is more common in the UK – is essentially an under blanket. It's for use in bed to help you get a better night's sleep in a cold room. It goes on top of your mattress or mattress topper and you sleep on top of it. Inside the blanket are wires that radiate heat.

You’ll be able to feel the wires underneath you but not to the extent that it should disturb your sleep. These blankets tend to be made of a fleecy fabric that's warm and cushioning.

The second type is a throw you can pull over you when you’re relaxing on a sofa, chair or bed. These tend to be much like any throw you’d get for a sofa – tactile and fuzzy. The only difference is that there's a matrix of wires throughout.

Both types of blanket are controlled by a control panel midway down the cable. Typically, they’ll have different heat settings and a timer feature, so they’ll automatically switch off once you’ve dozed off.

Lewis Painter / Foundry

And both types of blanket can be cleaned in a washing machine.

For more specific product information, have a look at our reviews of the Cosi Home electric blanket and the Silentnight Comfort Control electric blanket. But from our testing, these are the specific features to look out for:

Controllers and dual controllers: If you’re buying an electric blanket for a double bed, having dual controls is ideal, so you and your partner can individually choose the perfect heat setting for your side. Dual controllers are a feature only available on pricier blankets.

How it fastens to your bed: Some electric blankets have a strap you need to feed right under the mattress to secure, others have elastic corner straps. The latter make it much easier to attach and remove for washing.

Settings: Really, the more heat setting options, the better. This will allow you to find the sweet spot between making no difference whatsoever and roasting you like a turkey.

Timer: Most blankets will have a timer that’ll let you set it so the blanket switches off after a certain number of hours. It's a useful feature and you should make sure that the one you buy has it.

Size: When we reviewed electric blankets, the same issue came up repeatedly. Electric blankets don't cover the entire bed. Essentially, they’re heating pads that just cover the area where you lie. But our reviewers found that this created two problems: discomfort from cold heads and toes, and the fact that the blanket's hard, plastic connector was in the sleeping area – and is obviously uncomfortable to lie on.

Henry Burrell / Foundry

We should caution you here that your electric blanket should not hang over the side of your bed: it needs to lie flat or the wires inside may be damaged. But if you measure the size of your mattress and the size of the blanket you want, you may find you can safely size up.

Connector size and placement: Your electric blanket will be connected to a cable with a plug on the end. But, as we mentioned above, the connector may be in your sleeping area, so the best electric blanket to sleep on will have a connector that's flat and close to the edge of the blanket.

Safety features: The key safety feature you need is overheat protection. If the blanket gets too hot, it’ll switch itself off. Most electric blankets will offer this feature, and you should ensure that the one you buy does.

Temperature sensor: Some pricier electric blankets may have a room temperature sensor that’ll allow it to automatically adjust its heat setting.

Buying an electric throw is a much simpler and less technical proposition. Beyond measuring its size and considering how durable the fabric is, the key things to look out for are:

Emma Rowley / Foundry

You can read our review of the Glamhaus heated throw, which is a cosy, effective and budget-friendly option.

Years ago, electric blankets had a poor reputation for safety. But that's no longer the case. As we mentioned, you should look out for overheat protection. But as long as you buy an electric blanket from a reputable retailer and follow its care instructions, it will be perfectly safe to use.

When using your blanket, make sure that it is flat and that the wires inside aren't snarled up or pressed together. Don't cover your electric blanket when it's in use.

Most electric blankets are safe to put in the washing machine on a cool wash. Very few can be tumble dried – and we wouldn't recommend it. Hang or lay it flat to dry but if you’re pegging it to a line, make sure you avoid pinching the wires inside. Never switch it on to dry it more quickly and don't use it until it's perfectly dry.

When you’re putting your blanket away, roll it up so that the wires don't crease.

Make sure that you check it regularly for fraying or any signs of damage.

If you’re trying not to run up your electricity bill, an electric blanket is the cheapest way to stay warm. Even once you’ve factored in the cost of buying one in the first place, you’ll still save money if you switch on your blanket instead of turning on your central heating or putting on a plug-in heater.

An average electric blanket costs about 3p an hour to run. An average plug-in heater costs around 51p an hour to run. And your gas central heating will cost from £1.36 per hour to £4.41 per hour, depending on whether your home is a smaller flat or a larger house.

You can check for yourself. If you want to find out how much a heated blanket – or any plug-in appliance – costs to run, we’ve got an explainer that’ll help you to do it step-by-step. But as a quick guide, here's what to do.

A plug-in heater, for example, will probably be around 1,000-2,000W. So, if you were using a 1,500W heater for an hour and your unit rate is 34p (which is average for the UK now), the heater will cost you 51p an hour to run.

Electric blankets typically cost from around £40 upwards. At this price, you’ll get an under blanket for a single bed, with simple controls and basic features. From around £100, you can get a double under blanket with dual controls.

Throws cost from around £50 upwards and there's a wide variety of fleeces and velvety textures to choose form.

If you need more heat than an electric blanket can provide, have a look at our round-up of the best plug-in and portable heaters.

And if you want to know when it's cheaper to use a plug-in heater or when to switch on your central heating, have a look at our gas or plug-in heater explainer, which will help you to work it out.

Emma is Home Tech Editor at Tech Advisor. She covers everything from kitchen appliances to smart home devices, from floor care to personal care to air care technology. She's particularly interested in environmentally conscious brands and products that save people time and money.