
Instant warmth
The ceramic core reaches working temperature in about 2 seconds, so you feel warm air before you've sat back down.
Official UK website
Warm air in 2 seconds, from around 16p an hour.
From £59 · or 2 for £89
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You save £29 compared with buying separately
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2 sec
from switching on to warm air
~16p
an hour, typical with thermostat
1200W
heats rooms up to 20 m²
0.5 kg
carry it from room to room
One heater for £59, or save with 2 or 3 for different rooms.
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Ships within 24 hours with free tracked delivery. Usually with you in 2–5 working days.
No glowing bars, no 20-minute wait, and no paying to heat empty rooms.

The ceramic core reaches working temperature in about 2 seconds, so you feel warm air before you've sat back down.

Warm the room you're actually in, turn the house thermostat down a notch, and see the difference on your next bill.

At just 0.5 kg it goes wherever you go: the lounge in the evening, the bedroom at night.

No ticking, no clicking, and none of the burnt-dust smell you get from old bar heaters.

Peace of mind
Many families buy the K1 to replace an old bar fire. There are no glowing bars and nothing red-hot to touch. If it's knocked over, it switches itself off.
Instead of running the boiler for the whole house, keep the room you're sitting in cosy and turn the central heating down a notch. That's where the savings come from.
Work out your running costs →~16p
1 hour
~65p
An evening (4h)
~£19
A month of evenings
Estimates at 27p/kWh with the thermostat holding the room (about 50% on-time).
Warmth spreads along the floor first, then rises to fill the room. Here is the same small heater from three angles.

From the floor up
Warm air spreads across the carpet first, where your feet are.

From above
One K1 covers a living room of up to 20 m².

In the bedroom
Warm before you get in, then the thermostat holds it.
| Ofenwerk K1 | Oil-filled radiator | Bar fire | Cheap fan heater | |
|---|---|---|---|---|
| Warm air in about 2 seconds | ||||
| Thermostat cuts power once warm | ||||
| No glowing element | ||||
| Tip-over cut-off | Some | Some | ||
| Light enough to carry (0.5 kg) | ||||
| Remote control |
Read more: K1 vs oil-filled radiator · K1 vs fan heater

Most cheap fan heaters blow air over a glowing metal coil. They're slow to warm up, they scorch the dust in the air, and they keep drawing full power whether the room needs it or not. The K1 uses a PTC ceramic honeycomb instead. As the ceramic gets hotter, it automatically draws less power.
The element is sealed inside the ceramic, so nothing glows and nothing scorches.
Ceramic draws less current as it heats, so it can't run away with itself.
Air passes through the whole honeycomb rather than over one hot spot.

How big is it?
About the size of a shoebox, and it weighs just 0.5 kg. It fits on a side table, a desk or the floor, and it's easy to carry from room to room.
One K1 heats one room of up to 20 m². Tap the rooms you'd like to keep warm.
We recommend 2 × K1 Heaters for £89. That's £44.50 per heater. We've selected it for you.
You save £29 compared with buying separately
Secure, encrypted checkout powered by Shopify
Questions before you buy? Contact our UK team
You get the genuine Ofenwerk K1 at our official bundle prices.
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Free tracked UK delivery, 30-day money back and a 2-year warranty.
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