The best kamado heat deflector plates transform your grill from a direct-heat charcoal cooker into a full-featured smoker and convection oven. By sitting between the fire and your food, these ceramic accessories block radiant heat and force hot air to circulate evenly around whatever you’re cooking.
Whether you’re smoking a brisket low and slow or baking a pizza at high heat, the right deflector plate is the single upgrade that makes it all possible.
Quick Summary
Kamado heat deflector plates create an indirect cooking environment by blocking direct flame, enabling low-and-slow smoking and convection baking. Matching the plate size to your grill model, such as a 15-inch plate for a Classic Joe, is critical for proper airflow. Cordierite material offers superior thermal shock resistance compared to standard ceramic.
- Essential Upgrade — Kamado heat deflector plates convert your grill into a versatile smoker or convection oven by blocking direct heat and promoting even air circulation.
- Sizing is Key — Always match the deflector plate size to your specific kamado model (e.g., 15-inch for Classic, 19.8-inch for Big Joe) to ensure proper fit and prevent heat gaps.
- Material Matters — While standard ceramic offers excellent heat retention, cordierite provides superior thermal shock resistance, making it ideal for cooks involving rapid temperature changes.
- Versatile Designs — Half-moon plates offer flexibility for two-zone cooking, allowing both indirect and direct heat, while full-circle designs are best for dedicated low-and-slow smoking.
Quick Roundup List
- Best Overall: Kamado Joe Indirect Cooking Half-Moon Ceramic Heat Deflector Plates
- Best Value: Quantfire Half-Moon Ceramic Heat Deflector Plates
- Best Heavy Duty: COMVIEE Half-Moon Heat Deflector Plates
- Best for Big Joe: BBQ Future 19.8 Inch Half-Moon Ceramic Heat Deflector Plates
- Best Convection: BBQ Future Ceramic Heat Deflector Plates
Comparison of Top Heat Deflectors
Heat deflector plates for kamado grills are available from both original equipment manufacturers and third-party brands. Common materials include standard ceramic for heat retention and cordierite for better thermal shock resistance. Compatibility is specific, with distinct sizes like 15-inch plates for Classic models and 19.8-inch plates for Big Joe models.
| Product Name | Best For | Compatibility | Material |
|---|---|---|---|
| Kamado Joe Indirect Cooking Half-Moon Ceramic Heat Deflector Plates | Best Overall | Kamado Joe Classic I, II, III | Ceramic |
| Quantfire Half-Moon Ceramic Heat Deflector Plates | Best Value | Kamado Joe Classic I, II, III; Big Green Egg | Cordierite Ceramic |
| COMVIEE Half-Moon Heat Deflector Plates | Best Heavy Duty | Kamado Joe 18″ Classic I, II, III | Heavy Duty Cordierite |
| BBQ Future 19.8 Inch Half-Moon Ceramic Heat Deflector Plates | Best for Big Joe | Kamado Joe Big Joe I, II & III | Ceramic |
| BBQ Future Ceramic Heat Deflector Plates | Best Convection | Kamado Joe Classic I, II, III | Ceramic |
How We Chose the Best Kamado Heat Deflector Plates
Selecting the right heat deflectors involves evaluating material durability, fitment accuracy, and overall value. We prioritized plates made from high-quality ceramic or cordierite, as these materials offer the best heat retention and thermal shock resistance. We also considered compatibility with popular kamado grills, ensuring options for both standard and large-format models.
Customer feedback played a crucial role in our selection process. We analyzed reviews to identify common issues like cracking or poor fitment, prioritizing products with a proven track record of reliability. Finally, we looked at the versatility of the designs, favoring half-moon plates that allow for flexible two-zone cooking setups.
Best Kamado Heat Deflector Plates
Original equipment manufacturer (OEM) heat deflector plates are designed for a precise fit within a specific grill’s cooking system, like the Divide and Conquer rack. These plates are typically made from a premium ceramic that provides excellent heat retention, making them a reliable option for maintaining stable temperatures during long, low-and-slow cooks.
Kamado Joe Indirect Cooking Half-Moon Ceramic Heat Deflector Plates – Best Overall
These are the OEM heat deflector plates designed specifically for the Kamado Joe Classic series, so fit and function are guaranteed out of the box. They integrate directly with the Divide and Conquer Flexible Cooking System, giving Classic Joe owners a seamless upgrade to full indirect smoking.
The premium ceramic construction delivers the heat retention that kamado grills are famous for, making them the benchmark against which all third-party deflectors are measured. They are essential accessories for anyone serious about BBQ.
Pitmaster Tip: Always preheat your deflector plates for 10–15 minutes before adding food. This prevents thermal shock and gives you an even cooking surface from the start.Highlights
- Includes two half-moon ceramic heat deflector plates
- Ceramic design offers excellent heat retention
- For use with the Divide and Conquer Flexible Cooking System
- Compatible with Kamado Joe Classic I, II, III
Specifications
- Brand: Kamado Joe
- Compatibility: Kamado Joe Classic I, II, III
- Material: Ceramic
Customer Reviews
- “Excellent product. Made to exact dimensions and heat retention is excellent. They are definitely more expensive but the last pair I had lasted 10 years and only broke because I dropped one removing it from the Kamado.”
- “Perfect for my classic Joe — great to know I can get replacement parts so easily.”
- “Anything by Kamado Joe is going to be a quality product, and these are no exception. In addition to serving as heat deflectors in my KJ, I use them similarly in my gas grill for baking, etc., when I need to protect the bottom of whatever I’m cooking.”
Quantfire Half-Moon Ceramic Heat Deflector Plates – Best Value
The Quantfire plates are made from food-grade cordierite, a material prized for its superior thermal shock resistance compared to standard ceramic. They fit the Kamado Joe Classic series and cross-compatible Big Green Egg grills, giving them an edge in value for multi-grill households.
If you need a reliable replacement or first-time upgrade without paying OEM prices, this is a strong contender. These accessories are perfect for turning your grill into a capable smoker.
Pro Tip: Cordierite holds up better to rapid temperature changes than standard ceramic. If you frequently run high-heat cooks followed by low-and-slow sessions, cordierite deflectors are worth the consideration.Highlights
- Includes two half-moon ceramic heat deflector plates
- Excellent circulated heat and retention, perfect for baking bread, pizza, cookies, roasts and more
- Compatible with Kamado Joe Classic I, II, III; Weber, Traeger, Big Green Egg and other kamado grills
- Made of food-grade cordierite — does not contain any harmful substances or odors
Specifications
- Brand: Quantfire
- Compatibility: Kamado Joe Classic I, II, III; Big Green Egg
- Material: Cordierite Ceramic
Customer Reviews
- “Fits my kamado classic II like they grew there!”
- “Although the moons are great sturdy quality I will have to return as they were too small. Husband has the big Joe from Kamado Joe. So if you have the big Joe, these moons won’t fit — they’ll be too small.”
- “Our other ceramic plate broke but this replacement fits well!”
COMVIEE Half-Moon Heat Deflector Plates – Best Heavy Duty
When outfitting large kamado grills, these accessories convert the unit into a capable smoker by blocking direct heat and enabling indirect cooking. They accommodate the larger cooking chamber found in Big Joe and similar 24-inch models, making them suitable for large-scale BBQ events.
These heavy-duty accessories are ideal for those who frequently use their kamado grills as smokers for long, slow cooks. The cordierite construction ensures they will last through many BBQ sessions.
Highlights
- Includes two 15-inch Half-Moon Heavy Duty Cordierite Heat Deflector Plates, compatible with Kamado Joe 18″ Classic I, II, III
- Heavy duty cordierite distributes heat evenly across the entire surface, perfect for baking bread, pizza, cookies, roasts and more
- Sintered in 2100°F kiln for superior strength, durability, heat retention and excellent thermal shock resistance
- For use with the Divide and Conquer Flexible Cooking System — creates full indirect and two-zone cooking setups
Specifications
- Brand: COMVIEE
- Compatibility: Kamado Joe 18″ Classic I, II, III
- Material: Heavy Duty Cordierite
Customer Reviews
- “The half moon heat deflector is essential for indirect grilling, especially if you want to reverse sear a steak. I knocked off one star because when using both halves together to cook a large piece of meat, too much heat leaks through the middle crack. I find the pizza stone works better for that, but then I get meat drippings burned onto my pizza stone. Kamado Joe is an awesome grill and these heat deflectors are a good accessory to use with it.”
BBQ Future 19.8 Inch Half-Moon Ceramic Heat Deflector Plates – Best for Big Joe
Big Joe owners need deflector plates sized for their 24-inch cooking surface. These 19.8-inch half-moons from MixRBBQ are built exactly for that purpose. The extra surface area provides maximum coverage for large meats without leaving exposed gaps.
When outfitting large kamado grills, these accessories are a high-performance option for transforming the unit into a capable smoker. They are perfect for large-scale BBQ events.
Highlights
- 2-pack half-moon ceramic heat deflectors sized for the Kamado Joe Big Joe series
- Fits Kamado Joe Big Joe I, II & III — perfect grill accessories for large-format cooks
- Made with ceramic — offers excellent circulated heat and heat retention, perfect for baking, pizzas, bread, low and slow smoking briskets, roasts, whole chickens, or ribs
- Easy to use and clean — prevents charring by creating a convection style cooking experience, for use with the Divide and Conquer Flexible Cooking System
Specifications
- Brand: MixRBBQ
- Compatibility: Kamado Joe Big Joe I, II & III
- Size: 19.8 Inches
Customer Reviews
- “Awesome heat deflectors works great with my Kamado Joe grill in creating a barrier between the food and direct heat from charcoal.”
- “These are perfect replacements for my Big Joe!”
- “They work well but are fragile and expensive. Well now I have a spare after dropping one prior only about 2 inches into my hot Kamado. One of the downsides of using these is that the fire has to be well lit before you put the plate in which means your hands are very near hot coals.”
- “A great price for a great product. These replaced my original Kamado Joe Classic deflectors and fit perfectly.”
- “Works as advertised. Now I’m able to do indirect cooking on my Kamado Joe. Pleased with the purchase.”
BBQ Future Ceramic Heat Deflector Plates – Best Convection
These 15-inch half-moon plates turn the Kamado Joe Classic into a true convection oven. They block direct radiant heat and circulate hot air uniformly around the food. This prevents charring at higher temperatures, making them ideal for baking pizzas or smoking ribs.
These accessories are excellent for those who want to get the most out of their kamado grills. They are essential for any serious BBQ enthusiast looking to use their grill as a smoker.
Pitmaster Tip: Use these plates in combination with a raised cooking grate to maximize the convection effect. The added distance between the deflector and your food encourages more even air circulation and a better bark on smoked meats.Highlights
- 2-pack 15-inch half-moon ceramic heat deflectors for Kamado Joe Classic series
- Compatible with Kamado Joe Classic I, II, III — for use with the Divide and Conquer Flexible Cooking System
- Made with ceramic — offers excellent circulated heat and heat retention, perfect for baking, pizzas, bread, low and slow smoking briskets, roasts, whole chickens, or ribs
- Easy to use and clean — prevents charring by creating a convection style cooking experience
Specifications
- Brand: MixRBBQ
- Compatibility: Kamado Joe Classic I, II, III
- Material: Ceramic
Customer Reviews
- “A great price for a great product. These replaced my original Kamado Joe Classic deflectors and fit perfectly.”
- “Awesome heat deflectors works great with my Kamado Joe grill in creating a barrier between the food and direct heat from charcoal.”
- “Works as advertised. Now I’m able to do indirect cooking on my Kamado Joe. Pleased with the purchase.”
Buying Guide: Choosing the Right Kamado Heat Deflector
Selecting the correct heat deflector requires matching its size to your grill — Classic models use 15-inch plates while Big Joe models need 19.8-inch plates to prevent heat gaps. For material, choose standard ceramic for maximum heat retention or cordierite for superior durability against rapid temperature changes and potential cracking.
Sizing and Compatibility
The most important factor is getting the right size for your specific kamado model. Classic-series grills use 15-inch half-moon plates, while Big Joe models require 19.8-inch plates. Always verify your grill’s model number before purchasing to avoid heat gaps.
Pro Tip: Check the exact model designation on your kamado’s label or manual before ordering. Classic I, II, and III share the same 15-inch deflector size, but the Big Joe series requires a completely different plate.Material: Cordierite vs. Standard Ceramic
Standard ceramic is excellent at retaining heat and is the material used in OEM Kamado Joe plates. Cordierite offers better thermal shock resistance — meaning it handles rapid temperature swings without cracking as readily as standard ceramic. For frequent high-heat cooks or sessions with large temperature swings, cordierite is the safer long-term investment.
Cordierite’s longevity makes it a smart choice for those who use their kamado grills heavily. It excels in scenarios where you might be searing a steak at high heat and then dropping the temperature to finish cooking, a common technique in BBQ.
Half-Moon vs. Full-Circle Designs
Half-moon plates are the most versatile option because they allow two-zone cooking setups — one side indirect, one side direct. Full-circle deflectors cover the entire firebox, which is ideal for long low-and-slow smokes where you never want direct heat. Most experienced kamado users prefer half-moon designs for their flexibility across different cook styles.
For example, with half-moon plates, you can sear burgers over direct heat on one side while roasting vegetables indirectly on the other. This versatility is why half-moon designs are among the most popular accessories for kamado grills.
Frequently Asked Questions
How do you clean kamado heat deflector plates?
Allow the plates to cool completely before handling — never plunge a hot ceramic plate into cold water. Scrape off any residue with a dry brush or plastic scraper, then wipe with a damp cloth. Avoid soap and harsh detergents, as they can absorb into the porous ceramic and affect flavor in future cooks.
Can heat deflector plates be used as pizza stones?
Yes, kamado heat deflectors double effectively as pizza stones due to their ceramic construction. Place the deflector at the lower grate position and preheat for 20–30 minutes. Slide your pizza directly onto the surface for excellent baking results.
Why do kamado heat deflector plates crack or break?
Cracking is almost always caused by thermal shock — placing a cold plate into a very hot grill, or exposing a hot plate to water or cold air. The other common cause is physical impact: dropping a ceramic plate from even a short height can cause fractures.
Handle the plates with care during installation, always use heat-resistant gloves, and let the grill come up to temperature gradually when the deflectors are already in place.
Do heat deflectors add to cook time?
Indirect cooking with a deflector typically adds 10–20% more time compared to direct cooking at the same grill temperature. The trade-off is even cooking, no flare-up charring, and far more forgiving results on large cuts of meat. Adjust your target grill temperature slightly higher or your cook schedule accordingly when cooking indirectly.
How often should I replace my heat deflectors?
With proper care, ceramic or cordierite heat deflectors can last for many years. You only need to replace them if they crack or break. Regular maintenance and avoiding thermal shock will significantly extend their lifespan.
Can I use foil on my heat deflector plates?
Yes, wrapping your heat deflector plates in aluminum foil is a great way to keep them clean. It catches drippings and prevents grease from baking into the porous ceramic. Just be sure to replace the foil regularly to avoid grease fires.
General Maintenance and Storage Tips
Beyond cleaning, proper storage is crucial for maintaining your heat deflectors. When not in use, store them in a dry place where they won’t be bumped or dropped. Many kamado owners keep them inside the grill when it’s not being used, but ensure the grill is completely cool and dry first.
When handling the plates, always use two hands to support their weight evenly. Avoid stacking heavy items on top of them, as this can cause stress fractures over time. Treating these accessories with care will ensure they continue to perform well for years.
Take Home Message
A heat deflector plate transforms a kamado grill into a convection oven or smoker by blocking direct radiant heat from the charcoal. This creates an even-temperature environment necessary for low-and-slow cooking at 225–275°F, baking pizzas at high heat, or setting up a two-zone fire using half-moon plates.
Kamado heat deflector plates are an indispensable accessory for any kamado grill owner looking to expand their cooking capabilities beyond direct grilling. By providing a barrier against radiant heat and promoting convection, these plates enable perfect low-and-slow smoking, high-heat baking, and versatile two-zone cooking.
Investing in the right size and material ensures durability and optimal performance for all your kamado adventures.
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