A heated throw or electric blanket runs at somewhere between about 35 and 150 watts depending on the setting, against a gas boiler heating a whole house that's commonly costing somewhere north of 80 pence an hour to run at anything like full output. That gap is the entire case for this category: on a cold evening, warming yourself directly is very often cheaper, faster and more comfortable than waiting for the thermostat to catch up, especially in a room you're only using for an hour or two.
It isn't a substitute for a house that's actually cold because it's poorly insulated, badly heated, or damp — that's a fabric-first job, not a blanket's. And it doesn't touch an EPC rating, whatever the marketing on the box implies about "energy saving." What it is, honestly, is a cheap, low-risk way to take the edge off a cold room for the cost of a coffee's worth of electricity, provided it's a product that's actually safe to use and you know when to retire it.
Below is how I'd judge what's on the shelf, the running-cost numbers worked through properly, and seven heated throws and electric blankets worth considering.
The one I’d buy
Beurer HD150 XXL Cosy Nordic Heated Throw
The only throw in this guide with a wattage figure Beurer actually publishes rather than leaving you to infer — 100W, which is worth something on its own in a category where most listings say "energy saving" and stop there. Six heat settings, an XXL 200×150cm size that genuinely covers two people on a sofa, a BSS electronic overheat sensor that cuts power on a fault, and fully machine washable once the controller's unplugged.
Typically £70–£80
Check price on AmazonHow I judge a heated throw or electric blanket
A genuinely published wattage, not just a marketing claim. A "3p an hour" line on the packaging is a manufacturer's own figure, usually unaudited — useful as a rough steer, not something to take as gospel. A published wattage lets you do the sum yourself against your own electricity rate rather than trusting someone else's arithmetic.
Timer duration and what happens when it runs out. A throw for evening sofa use wants a short auto-shutoff, an hour or two, so it can't be left running unattended. A blanket meant to be on overnight needs an explicit "safe all-night" setting, not just a generic overheat cutoff — check the listing says which it is, don't assume.
A safety mark that's actually current. Look for UKCA or CE on the product itself, and treat "BEAB approved" as a bonus where it's shown, not a given — Electrical Safety First's own advice notes marks can be used fraudulently by disreputable sellers, so a badge on a listing photo isn't proof by itself.
Dual control on anything shared. A double or king blanket with one controller heats both sides identically, which fails the moment two people want different settings. Independent left/right zones cost a little more and solve a genuinely common household argument.
Machine washable, properly. Every product here claims it, but the controller always has to be unclipped first — worth checking how easily it detaches before buying, since a fiddly connector is the difference between actually washing it each season and not bothering.
The comparison
| Product | Type | Settings / timer | Typical price | Best for | |
|---|---|---|---|---|---|
| Beurer HD150 XXL | Heated throw | 6 settings, published 100W | ~£70–£80 | Best all-round pick | View |
| Slumberdown Warm Heated Throw | Heated throw | 10 settings, 10hr timer, BEAB approved | ~£25–£30 | Budget pick | View |
| Silentnight Comfort Control Throw | Heated throw | 9 settings, 2hr auto shut-off | ~£40–£45 | Fine-grained heat control | View |
| Dreamland Snuggle Up Electric Throw | Heated throw | 6 settings, 1/3/9hr timer | ~£45–£50 | Fast heat-up, flexible timer | View |
| Dreamland Snowed In Mattress Protector | Electric blanket | 6 settings, 1/3/9hr timer | ~£100–£110 | Premium, organic cotton | View |
| Silentnight Dual Control Blanket | Electric blanket | 3 settings, dual zone | ~£40–£50 | Couples, different temperatures | View |
| Dreamland Sleep Tight Blanket | Electric blanket | 6 settings, safe-all-night option | ~£28–£32 | Budget pick | View |
The picks in detail
Beurer HD150 XXL Cosy Nordic Heated Throw
Best all-round — a real published wattage and a genuinely large size
Beurer is one of the few brands here that puts a wattage figure — 100W — in its own official spec table rather than leaving buyers to guess from a vague "energy saving" claim. Six heat settings, a BSS overheat sensor that cuts power automatically on a fault, and a 200×150cm size big enough to genuinely cover two people on a sofa rather than one person and a draughty gap. Oeko-Tex certified fabric, fully machine washable once the detachable controller's unplugged.
For
- Published 100W spec — you can do the running-cost sum yourself
- XXL size genuinely fits two on a sofa
- BSS electronic overheat safety system
Against
- No hours stated on the auto-shutoff timer, only "automatic switch-off"
- Priciest throw in this guide
Typically £70–£80
Check price on AmazonSlumberdown Warm Heated Throw, Pistachio
Budget pick — the only one here showing BEAB approval on its own packaging
Ten heat settings for fine control, a 10-hour timer with auto shut-off, and — unusually for this price point — a BEAB Approved mark printed directly on the packaging alongside CE and UKCA, rather than left to marketing copy elsewhere on the listing. Fully machine washable at 40°C once the controller's detached, backed by a 2-year guarantee. The manufacturer's own "3p an hour" claim on the box is plausible against a 100–120W draw, but it's their figure, not an independently audited one.
For
- BEAB Approved mark visible on the packaging itself
- 10 heat settings and a stated 10-hour timer
- Cheapest throw in this guide
Against
- No wattage published in the official spec table
- "3p/hr" is a marketing claim, not an independently verified figure
Typically £25–£30
Check price on AmazonSilentnight Comfort Control Heated Throw, Grey
Finest control — nine settings rather than the usual six
Nine heat settings against the six or ten more common elsewhere in this guide, split into a slower, moderate 1–6 range and a faster, hotter 7–9 range — genuinely more granular control over exactly how warm you want it. "Heatsafe" stitched-channel construction is Silentnight's way of preventing the internal wiring bunching or creating hot spots, and it shuts off automatically after 2 hours regardless of setting. Machine washable, 120×160cm.
For
- Nine heat settings for finer control than most rivals
- Explicit 2-hour auto shut-off, good for unattended sofa use
- Stitched-channel construction against hot spots
Against
- No wattage published — third-party estimates put it around 120W, unconfirmed
Typically £40–£45
Check price on AmazonDreamland Snuggle Up Electric Throw, Grey
Fast heat-up with a genuinely flexible timer
Dreamland's Intelliheat system is pitched on a 5-minute heat-up, which matters more than it sounds for a throw you're reaching for the moment you sit down rather than pre-warming ten minutes in advance. Six heat settings and a 1, 3 or 9-hour auto-shutoff timer — the three-way choice is genuinely more useful than a fixed single duration, letting a shorter evening session and a longer unattended one both get an appropriate cutoff. Machine and tumble-dryer safe.
For
- 5-minute fast heat-up
- 1/3/9-hour timer choice, not a fixed duration
- Machine washable and tumble-dryer safe
Against
- No manufacturer-published wattage — a customer-review estimate of "150W" appears on the listing but isn't an official spec
Typically £45–£50
Check price on AmazonDreamland Snowed In Organic Cotton Electric Mattress Protector, Double
Premium pick — a genuine mattress protector as well as a blanket
A 200-thread-count organic cotton mattress protector with heating elements built in, rather than a bare heated sheet — it does the job of a normal protector year-round and adds warmth in winter, with the elasticated skirt fitting a mattress up to 38cm deep. Six heat settings, the same 1/3/9-hour timer as the Snuggle Up throw, and a 3-year guarantee. Dreamland's own manuals for this range put single-control double models around 150W, though that figure comes from the wider product family rather than this exact listing.
For
- Doubles as a genuine organic cotton mattress protector
- 1/3/9-hour timer, 6 heat settings
- 3-year guarantee, machine washable
Against
- By far the most expensive product in this guide
- Single control only — not dual-zone despite the double size
Typically £100–£110
Check price on AmazonSilentnight Dual Control Electric Blanket, Double
Best for couples who want different settings each
Two entirely independent controllers, one per side of the bed, so one person can run theirs cold and the other warm without either compromising — the single most requested feature on a shared electric blanket and one plenty of budget models skip. Pinsonic-channel wiring keeps the heating elements from bunching in the wash, and it includes built-in overheat protection with a 3-year guarantee. The "from 1p an hour" line on the box is a lowest-setting figure, not a typical-use one — worth reading as the floor, not the average.
For
- Genuine dual-zone independent control, not a single shared setting
- Pinsonic-channel construction against bunching
- 3-year guarantee
Against
- No timer duration stated, only "auto shut off"
- The "BEAB approved" text visible on this listing belongs to a different, related product — don't assume it applies to this exact blanket
Typically £40–£50
Check price on AmazonDreamland Sleep Tight Electric Blanket, Double
Budget pick — explicit safe all-night settings
The cheapest full electric underblanket in this guide, with six heat settings including what Dreamland markets as "safe all-night options" — language worth taking seriously, since not every throw or blanket here is rated for that. Five-minute fast heat-up, a single detachable controller, overheat protection built in, and a reusable storage bag for summer. No wattage figure appears anywhere on the listing or spec table, only a vague "uses a fraction of the power of traditional heating" claim, which tells you nothing you can calculate with.
For
- Cheapest full underblanket in this guide
- Explicit "safe all-night" heat settings
- 3-year guarantee, machine washable
Against
- No wattage published anywhere — can't be checked against your own electricity rate
- Single control only
Typically £28–£32
Check price on AmazonWhat actually matters — and what doesn’t
The pence-per-hour numbers, worked through properly. At the current Ofgem price cap of 26.32p/kWh (electricity, Direct Debit, Oct–Dec 2026), a 100W throw costs about 2.6p an hour, a 130W throw about 3.4p. A single-control electric blanket on its lowest setting can run as low as 1p an hour; the same blanket at full power on a 150W double is closer to 4p. Against that, a whole-house gas central heating system commonly runs somewhere between 80p and £1.20 an hour depending on boiler output, home size and how well the fabric holds heat — a genuinely wide range, not a precise figure, but even at the low end it's fifteen to fifty times the cost of warming yourself directly. That's the entire case for this category on a cold evening in one room.
None of this moves your EPC rating. RdSAP, the methodology behind a domestic Energy Performance Certificate, only scores fixed heating systems — a plug-in throw or blanket, however good, isn't a recognised measure the way a new boiler or loft insulation is. If the real problem is a low-scoring certificate rather than one cold evening, that's a different conversation; my guide to EPC costs covers what an assessment involves, and my EPC service page is the next step if it's time for a fresh one.
The ten-year rule is worth taking seriously. Electrical Safety First recommends replacing an electric blanket after ten years, and specifically flags older blankets as a risk — inspect the fabric and cable for damage before first use each winter, especially after months in storage, and stop using it immediately at any sign of scorching, arcing, buzzing or a blown fuse. An old-style BEAB mark, rather than the current UKCA or CE marking, is itself a sign a blanket predates the current safety-testing regime and is likely well past due.
Marketing running-cost claims are a starting point, not a guarantee. "3p an hour" or "from 1p an hour" printed on a box is the manufacturer's own figure, usually for the lowest setting, not an independently audited average. Where a listing publishes an actual wattage — genuinely rare in this category — you can check it against your own tariff; where it doesn't, treat the marketing line as a rough steer and nothing firmer.
This doesn't fix a genuinely cold room. If a bedroom is cold because there's no fixed heating reaching it, the insulation's poor, or there's a damp or draught problem behind the symptom, a blanket treats the person, not the building — useful for one evening, not a substitute for the actual fix. Where that's the underlying issue, my retrofit assessment service is the place to start.
Questions I get asked
Is it safe to leave an electric blanket on all night? Only if the product itself says so — look for an explicit "safe all-night" setting or a genuinely low-wattage overnight mode, not just a generic overheat cutoff. Most heated throws are designed for supervised evening use with a short timer rather than unattended overnight running; check the listing before assuming either way.
Do heated throws or electric blankets affect my EPC rating? No. RdSAP assesses fixed heating systems — boiler, radiators, insulation — not portable plug-in appliances, however efficient. A better throw won't move a certificate; better fabric and fixed heating will.
How old is too old for an electric blanket? Electrical Safety First's guidance is ten years, and that's specifically flagged as a replace-it point, not just a "consider it." Test and inspect it before first use every winter in the meantime, particularly after it's been folded away in storage over summer.
Heated throw or electric blanket — which is cheaper to run? Both are cheap relative to central heating, but a throw is generally the lower-wattage option for evening sofa use, while a blanket on its lowest overnight setting can undercut even that. The bigger cost difference in practice is how long each one gets left running, not the wattage difference between them.
Where the real issue is a cold room rather than one cold evening, that's worth diagnosing properly — my retrofit assessment service looks at fabric, ventilation and heating together, and my guide to EPC costs explains what a fresh certificate involves if that's the next step. Get in touch for a second opinion, and there are more field-kit guides to work through, including thermal curtains and blinds for the window side of a cold room.
Small print. This guide is general information, not a safety inspection of a particular product — always follow the manufacturer's own instructions, and stop using any electric blanket or throw immediately at signs of damage, scorching or unusual smells. Prices are indicative, move constantly and are checked at the time of writing; the linked page always shows the current price. As an Amazon Associate I earn from qualifying purchases.