What kW stove do I need for my room?

Most Irish living rooms need between 4 and 8 kW. The exact figure depends on room volume, insulation level, number of external walls, and number of windows. Our free calculator gives you a recommended kW range in 2 minutes.

Is it bad to oversize a stove?

Yes. An oversized stove will be run on low burn most of the time, which causes incomplete combustion, creosote buildup in the chimney, and poor efficiency. It is better to match the stove output to the room calculation.

Do I need a bigger stove if my house is poorly insulated?

Yes. Poorly insulated rooms lose heat faster, so you need higher output to maintain comfort. Our calculator adjusts for insulation level automatically — select 'poor' if your home is pre-1980 and uninsulated, or 'average' if you have double glazing and some insulation.

Can a stove heat multiple rooms?

A standard stove primarily heats the room it sits in. To heat multiple rooms or supplement central heating, you need a boiler stove that connects to your radiators and hot water cylinder. Mention this on your survey and Jonathon will recommend the right boiler stove option.

kW Calculator

What Size Stove Do I Need?

Calculate the exact kilowatt output required to heat your room comfortably. Takes ceiling height, insulation quality, wall exposure, and window count into account.

Room Dimensions

Room Length (metres)

Room Width (metres)

Ceiling Height: 2.4m

2.2m standard3.5m high ceilings

Heat Loss Factors

Insulation Quality

External Walls

Number of Windows

Recommended Output

kilowatts

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Size for the room you're heating — not your whole home

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Open-plan spaces need higher output — add room areas together

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Irish winters rarely drop below -5°C — don't oversize your stove

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Find My Stove →

Not sure about your measurements? Our free home survey includes a full room assessment and stove specification.

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