Ember Retainer Grate vs Standard Fireplace Grate: Which Should You Buy?

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Below: how both designs differ, what the reference listings state, how to size a retainer to your grate, and which style suits which fire.

ember retainer grate vs standard fireplace grate: the difference

A standard fireplace grate is simple: cast iron or steel bars hold the logs up off the hearth so air feeds the fire from below. It works until the wood burns down, then embers slip through the bar gaps and land in the ash below, where they cool instead of finishing the burn. An ember retainer grate closes that gap. The reference listings show dual approaches: a full grate with a built-in retainer, like the Rocky Mountain Goods 23-inch grate with its 1/2-inch heavy duty cast iron bars and ember retainer, and separate steel mesh retainers that sit on top of a standard grate. The retainer listings are sized 16 x 10 inches, 12 x 8 inches, 12 x 7.5 inches and 20 x 12 inches, and the makers describe the same idea: the mesh keeps burning wood and coals gathered together for a lasting flame, the holes let air flow up to promote burning, and only ash falls through. A standard grate gives logs more room and more air; a retainer gives small fires a fuller burn.

What the listings show

The Rocky Mountain Goods grate is the heavyweight here: 23 inches wide, 13.5 inches deep, 6 inches tall, 1/2-inch heat-treated cast iron bars, and a lifetime warranty type. The retainer listings are lighter add-ons. The common size is 16 x 10 inches, sold by Flamorrow in a 2 pack, by Generic at 1.04 pounds, by Mxclimate in a 2 pack at 14.4 ounces and by Acheterry in a 1 pack. Smaller grates get the 12 x 8 inch size at 9.9 ounces and the 12 x 7.5 inch size at 8.8 ounces from Memrita or 8.4 ounces from Mxclimate; the 20 x 12 inch size at 15.2 ounces suits bigger grates. The RunNico lists 15.7 x 9.4 inches with a 4mm thickness in its bullets, though its spec table says 11.8 x 7 inches: trust the title and bullets, and measure your own grate before ordering. Materials are steel throughout, with black finishes, and the Flamorrow and RunNico bullets describe heavy steel that resists heat without rusting. No assembly is needed on any of them: they sit directly on the grate.

Sizing a retainer to your grate

A retainer that overhangs the bars is wasted steel; one too small leaves embers falling at the edges. Measure the inside of your grate where the logs rest, then pick the retainer size that covers it: 12 x 7.5 inches for small hearth grates, 16 x 10 inches for the common middle sizes, 20 x 12 inches for wide ones. Our fireplace grate size chart walks through measuring and clearances. If you are buying the whole grate new, the Rocky Mountain Goods 23-inch model builds the retainer in, at 13.5 inches deep and 6 inches tall.

Which style should you buy

Burn mostly smaller loads and relight often: a retainer keeps the coal bed alive and means less kindling at the next fire. Burn big splits all evening: a standard grate breathes better and the falling-ember problem matters less, since the bed stays deep. Run a wood stove instead of an open fireplace: neither belongs there, since stoves have their own firebox design. For the money, a steel retainer at 8.4 to 15.2 ounces is a cheap experiment on an existing grate, while the full cast iron grate with built-in retainer is the buy-once option.

Let the grate cool before adjusting a retainer, and fit it with the gloves you already use for the fire. Keep a spark screen up with any open fireplace fire.

Frequently Asked Questions

What is an ember retainer?

A steel mesh or plate that sits on top of a fireplace grate. It holds burning wood and coals up in the heat so they burn down to ash, while ash alone falls through to the hearth.

Do ember retainers fit any fireplace grate?

Match the size to your grate: the listings run 12 x 7.5 inches, 12 x 8 inches, 16 x 10 inches and 20 x 12 inches. Measure the inside of your grate before ordering.

Will a retainer smother the fire?

The makers design the holes to let air flow up through the mesh, and the Rocky Mountain Goods retainer is built into a grate made for high-heat fires. If the coal bed sits deep, stir it with a poker as usual.

What are ember retainers made of?

Steel throughout the reference listings, most with a black finish; the RunNico lists a 4mm thickness. The full grate option is 1/2-inch heavy duty cast iron.

Can I use an ember retainer in a fire pit?

The RunNico, Flamorrow, Mxclimate and Generic listings state both indoor fireplace and outdoor fire pit use. Size the retainer to the pit’s grate or fire ring.

Related guides

See the best fireplace grate for wood burning and the best cast iron fireplace grate picks, the best steel for a fireplace grate guide and the fireplace grate alternative comparison.