Keilini 
Updated October 2026 · Written by the Keilini Heater Pro UK team
Quick answer
Are plug-in heaters cheaper than central heating? For heating one room for a few hours, often yes. For heating a whole house, a gas boiler is usually cheaper per unit of heat.
What makes a plug-in heater cheap to run?
- A thermostat that cycles off when the room is warm
- A timer so it never runs all night by accident
- Fast warm-up, so you don't pre-heat for ages
- Sizing — a compact heater for a small room or personal use
Working out the running cost
Cost per hour = heater kW × hours × your price per kWh. Use our running cost calculator to plug in your own tariff.
Our pick for warming one room
Keilini Heater Pro
Ceramic PTC · warm in ~3s · 36–45dB · tip-over & timer shut-off
£59.98£119.98Save 50%
See packs & prices- Free UK delivery
- 30-day returns
- Secure checkout
Plug-in heater safety
- Plug directly into a wall socket
- Don't use behind furniture or under desks with paper
- Never dry clothes on it
- Switch off when you leave the room
Where Keilini Heater Pro fits
Keilini Heater Pro is a compact ceramic PTC fan heater. It starts producing warm air in around 3 seconds, spreads it through a 90° grille, and runs at roughly 36–45dB. A built-in thermostat holds your chosen temperature, a tip-over switch cuts power if it is knocked over, and a timer switches it off after 1–12 hours.
It is designed to warm the room you are in — not to replace central heating for a whole house.
Our pick for warming one room
Keilini Heater Pro
Ceramic PTC · warm in ~3s · 36–45dB · tip-over & timer shut-off
£59.98£119.98Save 50%
Or 3 for £139.97 — £46.66 each.
See packs & prices- Free UK delivery
- 30-day returns
- Secure checkout
Frequently asked questions
Are plug-in heaters cheaper than central heating?
For heating one room for a few hours, often yes. For heating a whole house, a gas boiler is usually cheaper per unit of heat.
Do plug-in heaters use a lot of electricity?
They use their rated wattage while the element is on. A thermostat reduces how often that happens.
Can I leave a plug-in heater on all day?
Only with appropriate safety features and supervision. Using the built-in timer is recommended.