Bathroom heating is its own discipline: you need serious warmth in under two minutes, splash-proof safety (look for IP21 minimum, IP24 ideally), and ideally wall mounting away from water. The classic Irish cold bathroom has exactly five good answers, from a €45 quick fix to permanent fitted solutions. Heat-up speed and IP ratings led our ranking.
Price and availability accurate as of publishing; subject to change.
Buying guide: how to choose
All electric heaters are '100% efficient' — read that right
A 2,000 W heater produces 2,000 W of heat whether it costs €30 or €300. What you're paying more for: better thermostats (less wasted run-time), heat retention (oil columns), safety features, and quieter or faster delivery. 'Eco ceramic' marketing changes nothing about the physics.
Match the type to the job
Quick blast in a bathroom: fan heater. All-evening living room warmth: oil-filled radiator (retains heat, cycles less). Heating just yourself at a desk: radiant/halogen pointed at you. Whole-room slow background: panel with timer. Wrong type = higher bills.
The real cost per hour
At ~36c/kWh standard rate: a 2 kW heater flat-out costs ~72c/hour; a 1 kW setting ~36c/hour; a 500 W radiant ~18c/hour. A good thermostat halves effective run-time — that's where savings genuinely live.
Spot heating beats whole-home electric
Electric heating a whole Irish house is brutal on bills. The winning strategy: keep central heating low, spot-heat the occupied room. A 1 kW oil radiator in a home office for 8 hours (~€1.50–2.50 with thermostat cycling) beats firing gas through the whole house.
Frequently asked questions
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.
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.
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.
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