onlyfire Stainless Steel Charcoal Firebox Conversion Kit for 22" Kettle — Ceramic Heat Deflector, Fuel-Efficient Smoker

The onlyfire Stainless Steel Charcoal Firebox Set with Ceramic Heat Deflector converts a kettle grill into a long-lasting, fuel-efficient smoker that holds steady low-and-slow temperatures.

If you love brisket, ribs, or any long smoking session but hate mid-cook temperature drops and constant refueling, this kit addresses those problems. The design pairs a double-layer stainless steel firebox with a high-density ceramic core to reduce heat loss, slow charcoal burn, and keep a consistent heat profile for hours. It’s a conversion kit made to fit full-size kettle grills, engineered to improve fuel economy and create a convection-style cooking environment without complicated modifications.

How does this set keep temperature steady during long cooks?

The dual-layer construction traps and radiates heat while the ceramic core acts as a thermal buffer, which prevents sudden dips in cooking temperature. That means fewer flare-ups and more predictable smoke times. The ceramic surface also evens heat distribution so food cooks more uniformly across the grate.

• High-density ceramic core absorbs and radiates heat slowly.
• Stainless steel outer shell reduces heat loss to air.
• Designed to sustain consistent low temperatures for hours.

How much charcoal will I save, and what temperatures can I hold?

The ceramic heat lock reduces charcoal consumption by improving combustion efficiency: coals burn slower and more completely. Users typically see substantially less fuel used during low-and-slow sessions while maintaining steady smoking temps around 225°F. That efficiency is helpful for long cooks where fuel logistics matter.

• 30–50% lower charcoal use compared with open metal baskets.
• Stable smoking temperature near 225°F for low-and-slow recipes.
• Suitable for multi-hour sessions without adding fuel mid-cook.

What cooking options and compatibility does the kit provide?

The set turns a standard kettle grill into a multi-function convection cooker: use it for classic smoking, roasting, or even high-temp pizza setups when configured correctly. The included ceramic deflector blocks direct flame to prevent burnt bottoms and encourages indirect heat and circulating smoke. Precision sizing ensures a snug fit in popular 22" kettle models for a straightforward upgrade.

• All-in-one conversion: smoker, roaster, and pizza-capable when paired with a kettle grill.
• Blocks direct flames to avoid scorching and create even indirect heat.
• Sized 20.5" × 5.7" to fit Weber 22" Original and Master-Touch grills.

How easy is it to use and clean between cooks?

The system is designed for practical, repeatable use: removable ceramic deflectors and a stainless steel firebox make ash removal and maintenance straightforward. The durable materials stand up to repeated heating cycles, and parts can be lifted out for quick access to ash and coals. That reduces downtime and keeps your grill area tidy between sessions.

• Removable deflector plates simplify ash cleanup and airflow tuning.
• Stainless steel body resists corrosion and withstands high heat.
• Designed for long events—6-hour family BBQs or up to 12-hour smoke sessions.

Who is this for? The onlyfire Stainless Steel Charcoal Firebox Set with Ceramic Heat Deflector is built for backyard pitmasters and home cooks who want real smoker performance without buying a separate appliance. It suits owners of 22" kettle grills who want to reduce charcoal costs, achieve steadier low-and-slow temperatures, and expand cooking options to smoking, low-temperature roasting, and more. If you value efficiency, predictable results, and easier cleanup, this kit upgrades an ordinary grill into a capable, fuel-saving smoker.