Work out the output first
Stove output is measured in kilowatts, and it is the single most important number in the decision. The rough method most of the trade uses is to work out the volume of the room in cubic metres, then divide by fourteen.
So a living room four metres by four metres with a two and a half metre ceiling is forty cubic metres, which comes out at roughly a three kilowatt stove. Most people find that surprisingly small, which is exactly the point.
A rough guide, not a specification. That calculation assumes a reasonably insulated modern room. An older solid wall property, a room with large windows, or an open plan space that flows into a hallway all change the answer. It is a starting point for a conversation, not a number to order from.
Why oversizing is the most common mistake
It is the fault we are called out to correct more than any other. The thinking is understandable: a bigger stove must be better value, and you can always run it lower.
The problem is that a stove run low does not burn cleanly. It smoulders. Flue gases leave the appliance cooler, cool further on the way up the chimney, and deposit tar on the way. Over a season that tar builds up, and tar in a flue is both a performance problem and a fire risk.
An oversized stove also makes the room uncomfortable. You end up opening a window in January, which rather defeats the purpose.
A correctly sized stove run properly hot is cleaner, cheaper to run, kinder to the liner and better to sit next to. There is no upside to going bigger.
Freestanding or inset
A freestanding stove sits forward on the hearth with the flue rising behind it. An inset model sits back into the chamber, closer to a traditional fireplace look.
- Freestanding radiates heat from more surfaces, so it warms a room faster. It needs more depth in front of the chamber.
- Inset is neater and takes up less floor space, which suits a smaller room or a through lounge where circulation matters.
- Depth decides it more often than taste. We measure the chamber at the survey and tell you which will actually fit.
What the chimney breast allows
The opening behind the stove is not fixed. On most jobs we open the chamber up to a suitable size as part of the installation, typically around a metre wide by nine hundred high, depending on the width of the breast and where the lintel sits.
That matters for two reasons. It sets which appliances will physically fit, and it decides how much of a feature the finish becomes. A generous chamber finished in brick slip or tile looks like part of the room. A cramped one looks like a hole with a stove in it.
If your property has no chimney at all, that is not the end of it. A twin wall flue system builds a flue where there was not one, running internally or up an external wall.
Eco Design and smoke control areas
Every new stove sold in the UK since January 2022 has had to meet Ecodesign standards, which cap emissions and set a minimum efficiency. Every stove we supply meets it.
The point that catches people out is smoke control areas, which cover much of Tyne and Wear. In one, you can only burn authorised fuel or use an appliance DEFRA has exempted. All of the brands we supply are suitable for use in a smoke control area, so it is not something you need to research yourself.
What we would ask at the survey
A free survey takes about half an hour and answers most of this properly rather than approximately. What we are looking at:
- Room dimensions and how well the property holds heat
- The width, depth and condition of the chimney breast
- Whether the stack is serviceable, and whether it needs lining
- Hearth requirements and what the floor will take
- Ventilation, which changes above five kilowatts
- What you actually want it to look like
We would rather talk you out of the wrong appliance than sell you the biggest one we stock. It saves an awkward conversation a year later.
