Room Heater Cost Picker
Cheapest way to heat one room — or just yourself. Honest physics.
Appliance Running Cost Calculator (Ireland)
“How much does the immersion cost to run?” is a perennial, culturally Irish question — and with Europe’s highest electricity rates it has never mattered more. This calculator works out what your immersion, electric shower, tumble dryer, oven and heaters actually cost at Irish unit rates, per use and totalled over a week and a year.
Reviewed 23 jul 2026
The tool
Open the tool full-screen ↗Use it right here — nothing is saved, and there’s no sign-up.
This tool may link to relevant products and services to keep it free. Affiliate links are marked and are placeholders during this early phase — see our affiliate disclosure
What to know
The cost of running anything electric is just its power in kilowatts multiplied by how long you run it multiplied by your unit rate. The surprises come from the big, hidden users: an electric shower and an immersion draw far more power than people expect, and a tumble dryer run daily quietly adds up. Seeing the euro figure next to each one is usually enough to change a habit.
Once you can see where the money goes, the fixes are obvious: shift heavy loads to a night rate, put a timer on the immersion, or swap the dryer for an airer on mild days. The tool points to the low-cost helpers — smart plugs, energy monitors, immersion timers — that make those changes stick, and links across to the running-cost tools for heating a room.
How this tool works
No sign-up, nothing saved — here is what it does with your answers.
- Pick the appliances you use and roughly how often you run each one.
- The tool multiplies each one’s power by your run time and your unit rate.
- You get a live per-use cost for each, plus a combined weekly and yearly total.
Frequently asked questions
What costs the most to run in an Irish home?
Usually the electric shower, immersion and tumble dryer — high-power appliances used regularly. The calculator ranks yours so you can see the biggest targets.
How much does the immersion cost to run?
It depends on its power rating and how long it’s on, but a typical immersion is one of the priciest things in the house per hour. A timer and a night rate are the usual fixes.
How can I cut these costs?
Shift heavy loads to a night tariff, use timers, and avoid the tumble dryer when you can. Smart plugs and energy monitors help you measure and hold the change.
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These tools give honest indications using current published rates and guidance, not professional advice. Rules, prices and provider terms change — always confirm the current figures with the relevant official body, provider or qualified professional before you commit.