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One of the most common mistakes with a stove installation is choosing a stove simply because it physically fits inside the fireplace opening.That doesn’t necessarily mean it will look right.
For me, the space around a stove is almost as important as the stove itself. A slightly smaller stove with a good amount of chamber showing around it will often look much better than a larger model squeezed tightly into the opening.
As a general rule, I normally aim for around 100–150mm either side of the stove. Some stoves may permit around 50mm to suitable non-combustible surfaces, depending on the appliance, but you should always check the manufacturer’s instructions. Personally, I find 50mm looks too cramped in most fireplaces. A bit more space gives the stove room to breathe visually and lets you actually see the chamber surrounding it.
I also like to see a decent amount of chamber above the stove. There isn’t one visual measurement I’d apply to every fireplace, but I generally prefer the space above the appliance to be at least as generous as the side gaps and often noticeably greater.
The 100–150mm figure is my preference for how the fireplace looks. It isn’t a universal installation requirement. Every stove needs to be fitted in accordance with its own manufacturer’s instructions. There is also an important difference between a stove sitting beside a non-combustible chamber and its distance from combustible materials such as timber.
Clearances to combustible materials can be considerably greater.
In England, Approved Document J covers combustion appliances, hearths, fireplaces, flues and chimneys. Scotland, Wales and Northern Ireland have their own applicable building standards and guidance.
Individual stove manuals can also require a permanent free-air gap around a recessed stove. Closing up a gap that the manufacturer requires can cause overheating, so this isn’t something to reduce simply to make a bigger stove fit.
This is probably the point I’d make most strongly. Don’t automatically look for the largest stove you can squeeze into the opening. I see photos online quite regularly where the appliance almost fills the entire opening. There is hardly any chamber visible around it and the whole fireplace looks too tight. When customers speak to us before buying, this is something we try to avoid.
A smaller stove with the correct output for the room and better proportions around it will usually make a much more convincing fireplace. The stove’s heat output should suit the room first. The size of the fireplace opening shouldn’t be the reason for buying a more powerful stove than you actually need.
Once you’ve got the amount of space right, the chamber itself can make a big difference to the finished fireplace. One of my favourite combinations is a rustic red brick chamber with a simple contemporary stove, which is exactly what I have with my two Parkray Aspect 5 stoves at home. Both have plenty of chamber showing around the top and sides, and the clean design of the Aspect 5 works really well against the more traditional brick.
The result feels balanced rather than cramped.
If you’re unsure whether you need a chamber at all, our guide Do I Need a Fireplace Chamber for My Stove? explains what a chamber does and how it can affect the available opening.
Our Parkray Aspect 6 showroom display gives a slightly different example. The Aspect 6 is larger than the Aspect 5, but it is sitting in a larger fireplace opening, so the proportions still work. There is clear space down either side, plenty of chamber above the stove and enough room around the appliance that it doesn’t dominate the fireplace.
That’s exactly why I wouldn’t say one particular stove size is right or wrong on its own.
The stove needs to suit the opening it’s going into.
Our guide What Makes a Fireplace Chamber Look Right? looks at this in more detail, including how the stove, chamber, hearth and mantel need to work together.
Caption: Parkray Aspect 6 in our showroom, with clear space either side and above.
When choosing the stove, I would look at four things:
A deeper recess can change how the stove looks from the front, so don’t judge the fireplace by the width of the opening alone. Each part can work well on its own, but that doesn’t guarantee the whole fireplace will look right together. It’s the proportions of the complete fireplace that matter.
If you’re choosing all of the components together, our guide How to Choose a Stove Package goes through the stove, chamber, hearth, beam and surround in more detail.
If you’d rather start with a complete combination, our Stove Suites bring the main components together while still giving you flexibility to change many of the individual parts.
The hearth affects the proportions as well. It has to comply with the requirements for the appliance being installed, but from a purely visual point of view, I also don’t like seeing a large stove sitting on a hearth that looks only just big enough for it. There should be some balance between the stove, hearth and fireplace opening.
We’ll cover stove hearth sizing and the different hearth options in a separate guide rather than going too far into it here.
There isn’t one clearance measurement that applies to every stove. Always start with the manufacturer’s installation instructions and the requirements that apply to your particular installation. Once those have been satisfied, I normally like to see around 100–150mm of visible chamber either side of the stove.
The right stove should suit the room, meet its installation requirements and look properly proportioned within the fireplace.
Don’t choose a stove simply because it is the biggest one that will physically fit.
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