KAWMET W15 / W16 (13.5 kW) (335x287) Cast Iron Grate
KAWMET W15 / W16 (13.5 kW) (335x287) is a cast iron fire grate measuring 335 × 287 mm, intended for KAWMET W15 / W16 rated 13.5 kW fireplace inserts. A replacement part — it fits in place of the original grate with no modification to the firebox.
A cast iron grate does three jobs at once in the firebox: it carries the load of fuel, feeds primary air under the layer of wood and lets ash fall down into the pan. Cast iron suits this better than steel because it does not warp when heated to several hundred degrees — warped bars would stop seating properly and air would escape around the sides instead of passing through the fuel.
Key features — W15 / W16
- Dimensions 335 × 287 mm — firebed area approx. 960 cm²
- Fits KAWMET W15 / W16 rated 13.5 kW fireplace inserts
- Material: cast iron — unlike steel it does not warp when heated
- A wear part, replaced without dismantling the appliance
- Manufacturer: KAWMET, Poland
Which models this grate fits
The grate is intended for the KAWMET W15, KAWMET W16 fireplace inserts. These models share the same seat dimensions, which is why they take a common grate. Mind the output rating: this grate fits the 13.5 kW version, not the other output variants of the same series — their fireboxes differ in size.
If you are unsure of the model, the surest check is the measurement: take the old grate out of the cooled firebox and measure it. This one is 335 × 287 mm — if yours matches to within a few millimetres, it is the same part. A smaller grate will shift in its seat, a larger one will not go in.
When to replace the grate
A grate is a wear part — it wears out faster than the body and exists precisely so that it can be replaced. Signs that it is time:
- A crack across a bar — the most common symptom, usually after years of service or after a hot grate has been cooled abruptly.
- Burnt, thinned bars — the gaps widen and smaller pieces of wood drop into the ash pan instead of burning out.
- Warping — the grate no longer sits flat in its seat, rocks when wood is added, and primary air escapes around the sides.
- The fire burns unevenly — embers on one side, barely smouldering on the other, despite an evenly stacked load.
Replacement does not require dismantling the insert: once the firebox has cooled and the ash has been removed, the old grate lifts out of its seat and the new one goes in its place.
How do I check whether the grate fits my firebox?
Measure the old grate once the firebox has cooled — this one is 335 × 287 mm. A match to within a few millimetres means the same part. Check the appliance model name as well; the grate is assigned to models W15 / W16, the 13.5 kW version.
How can I make the grate last longer?
The most important thing is emptying the ash pan regularly. Ash left under the grate cuts it off from the cooling air, and overheated cast iron wears out much faster. Beyond that: do not douse embers with water, do not force a poker through a hot grate, and do not overload the firebox beyond the recommended charge — excess wood means a higher temperature than the manufacturer allowed for.
KAWMET grates are cast in Poland, at the works in Zadąbrowie. Your nearest representative will confirm availability and purchase terms.
