How to Use a Smoker Box on a Gas Grill

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A smoker box is a simple way to add wood smoke to a gas grill, but it can be a little frustrating when the grill is hot, dinner is ready to go on and the wood chips are doing absolutely nothing. Usually, the answer comes down to where the box is sitting and how much heat is reaching it.

Once you find a position and burner setting that work together, there isn’t much mystery to it. Load the box with suitable wood, get it smoking and cook the food at the temperature the recipe requires, adding more wood only when you need it.

This guide focuses on reusable smoker boxes for gas grills. If you need the complete cooking setup, including which burners to use and where to place the food, see my guide to smoking on a gas grill. This is also part of my Ultimate Guide to Smokers.

What Is a Smoker Box?

A smoker box is a heat-resistant metal container that holds smoking wood and has openings that let smoke escape into the cooking chamber. The grill supplies the heat that gets the wood smoking, while the box keeps the pieces contained.

Some grills have a built-in box, sometimes with its own burner, while accessory boxes may sit on the cooking grate or fit into a specific position below it. The shape alone doesn’t tell you where yours belongs, so check its installation instructions before placing it over the hottest part of the grill.

A box made to replace a particular grill’s heat shield is different from a general-purpose box designed for the grate. Don’t remove parts from your grill simply because you saw someone put a smoker box underneath theirs.

What You Need

You’ll need a box compatible with your grill, the type of smoking wood it accepts, long tongs and heat-resistant gloves. A digital probe near the food is useful for checking the cooking temperature independently of how hot the box needs to be.

Also have a suitable heatproof surface available in case the instructions call for removing the hot box. Plan how you will reach the lid and add wood before lighting, especially if the box will be underneath a cooking grate.

If the box is new, wash or prepare it as its manufacturer directs and complete any required initial heating before cooking food. Remove packaging and labels rather than assuming they can simply burn away during dinner.

What Wood Should You Put in a Smoker Box?

Wood chips are a common choice because they fit easily into small boxes and heat relatively quickly. Some larger boxes also accept small chunks, but use those only when the box is designed for them and the lid can close properly.

Use wood sold for cooking, choosing a flavor that suits the food. Pecan is one of my favorites, and apple, cherry, hickory and oak are also useful choices. My Smoking Wood Guide explains the differences if you need help choosing.

Start with a modest amount within the box’s specified capacity, spreading the chips rather than compressing them into a solid mass. A full box isn’t automatically better than a smaller load, particularly when you’re learning how quickly the wood burns in your setup.

Don’t substitute pellets unless the box manufacturer permits them. A smoker box and a pellet tube work differently, and a container intended for chips doesn’t automatically become a properly functioning pellet smoker when you change the fuel.

Do You Need to Soak the Wood Chips?

I don’t normally soak wood chips before using them, since getting wet wood hot enough to smoke means dealing with the added water first. My foil woodchip pack guide explains my approach to keeping chips contained without relying on soaking.

Some smoker box instructions do specify soaked chips, so check the requirements for your particular accessory. Either way, soaking shouldn’t be your solution for a box sitting in the wrong position or getting far more heat than it needs.

Where Should the Smoker Box Go?

The box needs enough heat to get the wood smoking, which usually means a supported position over a lit burner. A box placed in the indirect cooking area may remain too cool even though that area is warm enough to cook the food.

If yours is designed to sit on the cooking grate, start there over the designated burner. If it is a model-specific insert for below the grate, install it exactly as directed while the grill is cold.

For example, some Napoleon boxes replace a specified sear plate on compatible grills, while Weber also provides boxes designed for the top of the cooking grate. Those are different designs, rather than two locations you can choose interchangeably for any box.

Leave the grill’s burner ports, grease drainage and ventilation openings clear. Never set the box directly onto a burner tube unless the grill and accessory instructions specifically provide for that installation.

How to Use a Smoker Box on a Gas Grill

Load the Box and Plan the Cook

With the grill cold, add the approved wood and close the smoker box lid. Keep the fill below the stated limit and make sure the lid fits without chips wedged around its edge.

Position the box where it belongs and decide where the food will sit. For low and slow cooking, the food should be over an unlit burner while the box receives heat on the lit side. My two-zone grilling guide explains that arrangement.

Check that you can open or service the box using the intended method. If refilling means removing a grate covered with food, consider whether a different compatible box or approved position would make the cook more practical.

Light the Grill and Heat the Wood

Follow the grill’s normal lighting instructions with the lid open, then use the box’s recommended startup setting. Some boxes need a higher preheat setting to begin smoking, while others are designed to work with the burner set lower from the start.

Close the cooking lid during preheating as directed and allow time for the metal and wood to heat. There isn’t one reliable number of minutes for every box, since placement, metal thickness, wood and burner output all affect how quickly smoke appears.

Don’t put the food on and hope the box will start working before the cook is almost finished, particularly with something that cooks quickly. Get useful smoke established first, then settle the grill at the temperature the food needs.

Adjust for the Cooking Temperature

Once the wood is smoking, reduce the burner output as needed to hold the recipe’s cooking temperature while keeping the box working. You may need a different setting from the one used to preheat it.

Watch the temperature near the food rather than judging the cook by how much smoke comes from the box. For a recipe calling for 250°F (121°C), a box that only smokes when the whole grill is far hotter isn’t providing a useful balance.

Use the normal operating range of the burner controls, and don’t obstruct the grill’s vents to trap smoke. If the box and the grill can’t work together at the temperature you need, change to another approved setup rather than modifying the gas system.

Add the Food and Keep the Lid Closed

Place the food in its intended cooking area, leaving room for circulation and keeping it clear of the box. For an indirect cook, make sure thinner edges don’t extend over the lit burner just because you’re trying to move them closer to the smoke.

Keep the cooking lid closed as much as practical and follow the recipe for temperature, doneness and resting. Smoke flavor is an addition to a properly managed cook, not a replacement for checking the meat.

Refill Only When More Smoke Is Needed

When the wood has finished producing useful smoke, add more only if you want it for the remaining cook. A long pork butt cook may justify refills, while a short cook or a food you prefer lightly smoked may need only the initial load.

Use the manufacturer’s refill method, protecting your hands from the hot lid and escaping smoke. Add a modest amount of fresh wood without packing it on top of a heavy accumulation of ash.

If the box must be removed to refill, use the proper tools and a heatproof surface. Don’t carry a hot box full of embers through the house, and don’t empty hot wood ash into a trash can to make room for more chips.

How Long Does a Smoker Box Produce Smoke?

The useful smoke time depends on the box, wood load, burner setting and position. Small chips exposed to substantial heat can be consumed fairly quickly, while a different box and a gentler heat supply may give you a longer interval.

Watch what happens during the first few cooks and note the amount of wood and burner setting you used. That will give you a more dependable refill schedule than a promise that every handful of chips should last a certain number of minutes.

Also remember that faint smoke can still contribute flavor. You don’t need to maintain a thick visible plume throughout the cook, and more visible smoke isn’t a dependable measure of better barbecue.

Troubleshooting a Smoker Box

The Chips Aren’t Smoking

Check placement first, making sure a lit burner is actually heating the box. On a grill with front-to-back burners, a box shifted sideways may be receiving less heat than you think.

Next, check the wood load and allow the metal time to warm. An overfilled box or very damp chips can make startup slower, but don’t assume every delay means you need to turn every burner to high.

Use the approved startup procedure, then find the setting that keeps the box working without overheating the food. If that balance isn’t possible in the current position, try another location only if the accessory instructions allow it.

The Wood Keeps Catching Fire

A box may be getting more heat than it needs, particularly if you leave the startup setting unchanged after smoke begins. Follow its instructions for reducing heat and handling a wood flare-up, keeping the grill lid closed where directed.

Don’t pick up or open a flaming box, and don’t spray water into a hot gas grill. If it is more than a small wood flare-up or you suspect burning grease, shut off the heat if safe and follow the grill’s fire instructions.

After everything has cooled, review the placement and wood amount before the next cook. Don’t drill extra holes or cover the existing ones as a substitute for using the box as designed.

The Food Doesn’t Taste Smoky Enough

Make sure the box produces smoke while the food is actually cooking. A very short grilling session may provide only a modest amount of wood flavor, especially if the box took most of that time to begin smoking.

On the next cook, try a modest change in wood amount or variety while keeping the setup consistent. Don’t block the grill’s ventilation in an effort to hold smoke around the food.

The Food Tastes Harsh or Bitter

Reduce the added wood or the number of refills on the next attempt, and make sure old grease isn’t burning elsewhere in the grill. A heavy cloud can come from more than the smoker box, so check the whole cooking environment.

Start conservatively with foods that take on smoke readily, and make changes after tasting the results. You can increase the smoke next time far more easily than you can take it out of food that’s already cooked.

Smoker Box, Foil Packet or Pellet Tube?

A reusable smoker box is convenient when you frequently cook with chips and want a container you can load again. A permitted foil packet is a simple alternative for trying the process, and my foil woodchip pack instructions include step-by-step photos.

A pellet tube supplies smoke from pellets that are lit separately, rather than depending on burner heat in the same way as a chip box. It can work well on a gas grill as long as the installation is permitted and enough air reaches it to keep the pellets smoldering.

My pellet tube guide covers that process. Choose the option that works with your grill and cooking temperature, rather than assuming you need all three operating at once.

Cleaning and Storing Your Smoker Box

Shut down the grill as directed and allow the box, wood and ash to cool completely before cleanup. The box can contain hot embers after the burners are off, so don’t judge it by whether smoke is still visible.

Empty cold ash into a suitable metal container, brush out loose residue and clean the box according to its material and care instructions. Keep the smoke openings clear without enlarging them.

Dry it thoroughly before storing it, especially if it is cast iron or another material that needs protection from rust. Discoloration from heat is normal, but a distorted lid or damaged container needs attention before you use it again.

When the food is finished, use the smoker shutdown guide before handling the box and its contents, then the smoker cleaning guide for the rest of the grill and grease system.

Final Thoughts

A smoker box works best when it receives enough heat to produce smoke without forcing the cooking area above the temperature the recipe needs. Get that relationship sorted out, use a sensible amount of wood and the rest becomes much easier.

Start with one wood and a manageable cook, then keep a few notes about the placement and burner setting. Once you know what works on your grill, you can repeat it without spending half the afternoon wondering whether the chips are ever going to join the party.