Heated throws deliver direct warmth to your body for pennies per hour, which is why they are a favourite for sofa evenings in the UK. They use a fraction of the energy that a space heater or central heating would require to make a room feel comfortable. This guide explains real running costs with simple examples, shows when a throw beats heating the room, and shares practical habits that keep you cosy while keeping bills low and safety high.
Sofa evenings feel warmer with heated throws that work on low.
How Much Power Does a Heated Throw Use
Most heated throws draw between 80 and 150 watts on medium settings. To estimate cost, convert watts to kilowatts by dividing by 1,000, multiply by the hours of use, then multiply by your tariff in pounds per kilowatt hour. For example, a 120 watt throw used for two hours is 0.12 times 2 equals 0.24 kilowatt hours. At a tariff of 28 pence per kilowatt hour, that is about 7 pence. Even at higher settings or longer sessions, the numbers stay small compared to heating a whole room.
When a Throw Beats Heating the Room
Heating air in a space takes time and energy. If you are relaxing on the sofa for a couple of hours, a heated throw warms you directly rather than warming the air around you. That means you feel comfortable sooner and you do not spend money maintaining a higher air temperature. In well insulated rooms, lowering the thermostat and using a throw can save money without sacrificing comfort. In older or draughty rooms, the benefit is even bigger because much of the heat from a space heater escapes quickly. A throw makes sense whenever you want targeted warmth at low cost.
Comfort Tips for Low Settings
Layer the throw over a breathable outfit so heat is not trapped against the skin. Cotton or modal loungewear works well. Warm your feet and lap first because that is where you feel cold most. Start on a higher setting for a few minutes, then step down to low when you feel comfortable. If your throw has a quick heat function, use it to get cosy faster without staying on high. Do not pile heavy blankets over the throw because that can trap heat and may not be recommended by the manufacturer. A light throw on top for texture is usually fine if instructions allow.
Choosing Fabric and Size
Soft microfleece and Sherpa lined throws feel plush and hold warmth well. Smooth microfibre suits living rooms with a minimal look. An XL throw is helpful if you are tall or if you want to share. Cable length matters more than people expect. Choose a model with a long cord so you can reach a socket without stretching across walkways. Look for controllers with clear buttons and a backlight so you can change settings without turning on bright lights.
Safety and Care
Modern heated throws include overheat protection that cuts power if a fault occurs. Always check for a UKCA or CE mark. Do not use the throw if the fabric is damaged or the cord shows wear. When washing day arrives, detach the controller and follow the label. A cool, gentle washing cycle and flat drying protect the internal elements. Coil the cord gently rather than wrapping it tightly around the controller. Store the throw loosely folded in a dry place. If you tend to doze off on the sofa, choose a model with a timer and set it to switch off after an hour or two.
Comparing to Other Heating Options
A small fan heater on low often draws 1 to 1.5 kilowatts. At 28 pence per kilowatt hour, one hour costs between 28 and 42 pence, which is several times the cost of a heated throw for the same period. Central heating can cost even more depending on your boiler and the size of your home. For quick evening warmth, the throw is the clear value winner. Save room heating for times when you need to move around or when guests need the whole space to feel comfortable.
FAQs
Models that feel warm on low settings regularly appear in heated throws for UK homes; for bedtime use, many pair with electric underblankets that pre‑heat quickly.
How much does a heated throw cost to run? On low or medium settings, usually only a few pence per hour. Use watts times hours times tariff to estimate your exact cost.
Is it safe to nap under a heated throw? Yes, use models with timers and overheat protection and choose low settings. Follow the manual on safe use and do not cover the controller.
Can I wash a heated throw? Many are machine washable once you detach the controller. Use a cool, gentle cycle and dry flat. Always check the label first.
