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electric blanket guide

written by Sam C

updated 23.10.2025

electric blanket with temperature control - electric blanket advice
  • An electric blanket is a type of blanket which is placed on top of the mattress but under the sheet to heat a bed. They're plugged directly into the mains and work by driving electric through insulated wires, creating and distributing heat throughout the fabric which can be controlled using a remote. 

  • To wash an electric blanket, first remove the power cord and controller from the blanket. You can remove any dirt or stains by spot cleaning with a wet cloth and a mild detergent. Most electric blankets are suitable for washing machines; however, you should wash the blanket on a delicate or gentle wash at a low temperature. You should air dry electric blankets rather than using a tumble dryer.  

During the colder months, it's not always enough to rely on your radiator to keep you warm while you sleep. That’s why an electric blanket is becoming an increasingly popular addition to houses across the UK, providing that extra level of warmth that you can't get with an ordinary blanket. Join us and find out why so many people choose to use a heated blanket and let us help you find the perfect electric blanket for your needs. Or, if you’re just looking to find out how to safely use your electric blanket, then we’ve got you covered too.  

 what is an electric blanket?

 An electric blanket, also known as a heated blanket, is a bedding accessory that contains built-in electrical heating elements. Generally placed under a bed sheet but on top of a mattress protector, an electric blanket is designed to generate warmth by delivering controlled heat. They typically have adjustable temperature settings, allowing you to select your preferred level of warmth before hitting the hay. 

 how to use an electric blanket

 To start using your electric blanket, spread it over the bed and make sure any wires or controls are clear of your neck area. Silentnight electric blankets are designed with the controls at the head of the bed safely out of the way (other manufacturers may vary). Next, plug the cord into your blanket, and then into the wall. Switch the controller to your preferred settings, depending on how chilly you are, and you’ll soon feel the calming and snug warmth.    

Please note: You should always read the instructions before using your electric blanket – this has all the information you need to prevent any hazards, such as how to use and care for your blanket. 

 are electric blankets safe?

Electric blankets are very safe to use with the correct care and guidance. When purchasing an electric blanket, buying one that is brand new, rather than second-hand, is always advisable. It’s also important to check that the blanket you choose includes overheating protection.  

can you sleep with an electric blanket on?

Electric blankets should never be left unattended when turned on but, we know it’s easy to doze off when snuggled under one. We don't recommend sleeping with an electric blanket on or leaving it heated up all night unless you have a thermostatic control or timer which will automatically turn it off. You should make sure to read the instructions before using your electric blanket as this has all the information you need to prevent any hazards, including safety advice.   

electric blanket buying guide

Here’s some key features to look out for when buying the best electric blanket for you: 

  • Heat settings - This lets you switch between different temperatures, so you can reach an optimum level of warmth. 

  • Over-heating protection - This is a must on any electric blanket and makes sure the blanket automatically turns off if any overheating occurs.  

  • Dual control - Perfect for couples, dual controls let you set a different temperature for each side of the bed. 

  • Ultra-fast heat up - Getting warm under the duvet can feel like it takes a lifetime on these chilly nights. The ultra-fast heat up feature will get you from freezing to cosy in no time. 

  • Cord length - Check the cord length of your blanket, it would be very frustrating to find the blanket won’t reach the bed. 

  • Size - You want to make sure you select a blanket which is the right size for your bed. Silentnight's collection of electric blankets is available in a range of sizes, from snug fits to cover single beds, to super king-sized options. 

  • Maintenance – You’ll want to consider the maintenance of your electric blanket. There’s a chance you may spill or stain your blanket, especially as it’s designed to sit under a thin bed sheet. Before cleaning your electric blanket, you should always check the manufacturer's instructions. 

stay warm for less with heated blankets and throws

electric blanket faqs

how long do electric blankets last?

An electric blanket should be replaced roughly every 10 years. It’s essential to replace your blanket if it begins to show signs of wear and tear. If you notice any of the damages below, you should consider replacing your blanket for safety reasons: 

  • Creasing or folding 

  • Loose connections 

  • Scorch marks 

  • Fraying fabric 

  • Exposed parts of the blanket 

  • Damp patches 

  • Worn flex 

  • Missing or damaged tie tapes 

are electric blankets expensive to run?

The cost to run an electric blanket will vary depending on the size and model of your product, as well as the duration of usage. However, electric blankets are typically a more cost-effective way of staying warm while you sleep, generally costing only a few pence per hour. The exact cost per hour does depend on the power rating, its quality, how long it’s on for and the energy prices at the time of use. 

how to store an electric blanket?

If you want to store away your heated blanket, it’s best to carefully roll it beforehand, instead of folding it. This avoids causing any damage to the wires and helps your electric blanket last longer.  

how to wash a Silentnight electric blanket?

First, disconnect the power lead from the blanket by lifting the flap so the small round button is released. Then, pull to release the cord. The blanket section is then suitable to be machine washed the same way as wool at 40°C and either air dried or low heat tumble dried. All Silentnight blankets are machine washable but not suitable to be dry cleaned. Please follow the manufacturer’s instructions if you’re unsure.  

how hot do electric blankets get?

Electric blankets can be set to a variety of temperatures, depending on your preference. The lower temperatures tend to be around 18 -25°C, but they can go as hot as 56°C. 

should electric blankets go above or below mattress protectors?

The electric blanket should be "sandwiched" between the mattress protector and the bottom sheet that you sleep on. Your electric blanket should also be placed above your mattress topper however, if you’ve selected your topper for its body moulding properties, you will notice a difference in the feel when you put an electric blanket on top of it. 

can you use an electric blanket with a memory foam mattress?

Yes, you can use an electric blanket with a memory foam mattress, but you should make sure you also use a mattress topper as there is a chance the heat will warp the foam, meaning the mattress won't mould to your body’s shape as well. You should also try and avoid using an electric blanket at a high heat on memory foam as you risk damaging the mattress.  

do you sleep over or under an electric blanket?

An electric blanket should be positioned on top of your mattress and under your sheet and secured at the corners when fastening straps are provided. A heated throw can be draped over you.  

shop the best electric blankets here

At Silentnight, we have a range of electric blankets to suit your sleep preferences, available in fleece and luxury options designed for couples or solo sleep. With a variety of control options to suit your desired temperature range, you can explore our full range of electric blankets today. And discover even more ways to stay warmer this winter with our range of foot warmers and weighted blankets.  

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