What the standard fixes
EN 12815 covers residential cookers fired by solid fuel — the range with a hotplate, usually an oven, and a firebox that also heats the room it stands in. It sets out construction requirements and a test procedure of the same shape as the one for stoves: a defined fuel, a defined rig, a defined duration, recorded outputs.
Where it differs is in what it asks the appliance to do while it is measured. A cooker is assessed on its cooking function as well as its heating function, which means the test includes the behaviour of the plate and, where fitted, the oven. The declared figures therefore separate what the appliance puts into the room from what it puts into the cooking surface.
What it does not promise
It does not promise the two functions are available at once at their stated levels. Running a cooker hard enough to hold an oven temperature and running it to heat a room are different operating points, and a listing that quotes one figure rarely says which.
It does not describe the oven the way a domestic electric oven is described. There is no thermostat behind a firebox: the temperature is a consequence of how the fire is being run, and holding it is a skill rather than a setting.
And as with every appliance standard here, it says nothing about your chimney, your clearances, or the floor the range stands on.
The documents that sit beside it
Cookers fall under the same market regulation as other solid fuel local space heaters, and German listings print the national stage designation on them as they do on stoves.
On this site, a wood cooker sits beside the wood stove family deliberately: several appliances are sold under both descriptions, and the word that separates them in German listings is the word for the range rather than the word for the stove. Where a listing uses both, the page says which figure it is quoting and from which function.
Where it appears on this site
Every wood-burning cooker reviewed here cites it. So do the firebox consumables, which on a cooker wear faster than on a stove for the plain reason that a cooker is lit more often and run harder.
Questions that keep arriving by post
Can a wood cooker heat a house?
It heats the room it stands in, and its declared room output says how much. Whether that is enough for a house depends on the house, and this site does not answer that question: a heatable volume is arithmetic against an assumed building, not a description of yours.
Does the oven hold a temperature?
It holds whatever the fire gives it. There is no thermostat: the plate and the oven follow how the appliance is being run, and the makers that publish anything at all about this publish a range rather than a set point. Where a maker publishes nothing, the page records that.
Is a cooker tested differently from a stove?
Under a different document, yes, because the appliance is asked to do something a stove is not. The shape of the test is the same — one fuel, one rig, one operating point — but a cooker is also assessed on what it does to a cooking surface.
Last reviewed 22 September 2026