Best Electric Heaters in Ireland — All Guides
With Irish electricity among the priciest in Europe, the wrong electric heater is a money bonfire — but the right one, used to heat the person instead of the whole house, cuts bills. The maths matters: every heater converts electricity to heat at ~100% efficiency, so the differences are in how they deliver it (radiant vs convection vs oil), how well they hold it, and thermostat intelligence. We compare them honestly, running costs included.
Electric Heaters: frequently asked questions
What's the cheapest electric heater to run in Ireland?
The one with the lowest wattage that does the job, run through a good thermostat. For heating a person: a 400–800 W radiant heater. For a room: an oil-filled radiator on a thermostat cycles off once warm, often averaging half its rated draw across an evening.
How much does a 2kW heater cost per hour in Ireland?
At a typical 36c/kWh: about 72 cents per hour at full power. With a decent thermostat in an average room it cycles on and off, usually averaging 40–60% of that. Smart-meter night rates can drop the cost dramatically for overnight panel use.
Oil-filled radiator or fan heater — which is cheaper?
Same electricity per heat delivered, but they suit different jobs. Fan heaters: instant heat, short bursts, bathrooms. Oil radiators: slow start but keep radiating after cycling off, so they're cheaper across a whole evening in a closed room.
Are 'eco' ceramic heaters really more efficient?
No heater beats another at converting electricity to heat — all are ~100%. Ceramic units heat up fast and some have decent thermostats, but the 'eco' badge is marketing. Buy on thermostat quality, noise and safety, not efficiency claims.
Is it safe to leave an electric heater on overnight?
Only oil-filled radiators with tip-over switches and thermostats are generally considered safe for unattended/overnight use — and even then keep clearance from bedding and curtains. Never leave fan or halogen heaters running unattended, and avoid extension leads with any 2 kW heater.
Can an electric heater heat a whole room?
Yes — allow roughly 100 W per square metre in a typically insulated Irish room (so 1,500 W for a 15 m² room). Poor insulation or high ceilings need more. Close the door: the cheapest upgrade for any heater is a closed door.
Electric heater or heat pump — what about running costs?
A heat pump delivers 3–4 units of heat per unit of electricity, versus 1:1 for any plug-in heater — but costs thousands installed. For heating one room a few hours daily, a plug-in heater is rational; for whole-home daily heating, the heat pump wins long-term.
What size heater for a home office?
A typical 10–12 m² home office needs 1,000–1,200 W to heat fully — but if it's just you at a desk, a 400–800 W radiant panel or under-desk heater warms you for a third of the running cost. Heat the human, not the air.