Table of Contents
Ever stood there watching half your steak char to oblivion while the other half stubbornly refuses to cook through? That frustrating dance around hot spots and cold zones is the bane of backyard chefs everywhere. Conventional grills often leave you juggling food like a circus performer, constantly rotating and relocating cuts to avoid disaster. It’s not just annoying—it wastes precious cooking time, ruins meals, and turns what should be a relaxing ritual into a high-stress chore. If uneven heating has ever made you question your grilling skills (spoiler: it’s rarely your fault), you’re not alone. The culprit usually lies in how the grill manages and distributes heat, not your technique.
Enter infrared gas grilling—a game-changer designed to tackle uneven heating head-on. Unlike traditional convection grills that rely on heating the air around your food, infrared technology uses radiant energy to cook directly, much like the sun warms your skin. This fundamental shift in heat transfer promises searing precision, locked-in juices, and remarkably even results across the entire cooking surface. But not all infrared grills deliver on that promise equally. Understanding why uneven heating happens and what specific features truly combat it is the key to transforming your grilling from guesswork to greatness. Let’s dive into the science and smart shopping strategies that turn infrared potential into perfect, consistent cookouts.
Top 10 Infrared Gas Grills
Detailed Product Reviews
1. Monument Grills Larger 4+2 Burner Propane Gas Grills Stainless Steel Cabinet Style with Clearview® Lid, Knob Controls, Built-In Thermometer, Infrared Side Sear Burners & Side Burners, Blue
Overview: The Monument Grills 4+2 Burner Propane Gas Grill is a premium cabinet-style unit built for serious outdoor chefs, featuring robust stainless steel construction and commercial-inspired performance. With a focus on durability and expansive cooking, it targets enthusiasts seeking a backyard centerpiece.
What Makes It Stand Out: Its 72,000 total BTUs from six stainless steel burners—including dedicated infrared side sear and side burners—deliver exceptional versatility. The Clearview® lid allows monitoring without heat loss, while stainless flame tamers ensure even heat distribution. Knob lights enhance nighttime usability, a rare feature in this class.
Value for Money: Priced competitively against high-end rivals, it justifies cost with superior materials (all-304 stainless steel) and 723 sq in cooking area. Though not convertible to natural gas, the infrared capabilities and cabinet storage offer better long-term value than basic 4-burner models.
Strengths and Weaknesses: Strengths: Massive cooking space; durable stainless build; excellent heat control; useful infrared burners. Weaknesses: Heavy cabinet limits portability; no natural gas option; assembly complexity.
Bottom Line: An outstanding investment for large gatherings, combining power, precision, and premium features. Ideal for dedicated grillers prioritizing performance over portability.
2. Charbroil 463655421 Performance Series Amplifire Gas Grill - Stainless
Overview: Charbroil’s Performance Series Amplifire Grill offers a streamlined, mid-tier solution for casual grillers seeking reliable performance without overwhelming complexity. Its compact stainless design focuses on essential features for everyday use.
What Makes It Stand Out: Amplifire Cooking Technology is the star, using a patented burner tube to ignite 100% of the flame instantly for faster preheating and consistent heat. The lid-mounted thermometer and folding side shelves maximize functionality in tight spaces, enhancing practicality for patios or small yards.
Value for Money: Positioned affordably, it undercuts premium models while delivering solid performance. Amplifire’s efficiency reduces fuel waste, offering long-term savings. However, the smaller cooking area (vs. competitors) may disappoint for larger groups, making it best for families of 4–6.
Strengths and Weaknesses: Strengths: Quick, even heating; space-saving foldable shelves; reliable ignition; easy maintenance. Weaknesses: Limited cooking space; basic materials (less stainless than premium rivals); no sear burner or warming rack.
Bottom Line: A smart buy for budget-conscious users needing dependable, fuss-free grilling. Skip if you regularly host big crowds or demand advanced features.
3. Veralune 55,000 BTU 4+1 Burner Gas Grill with Infrared Side Burner, Porcelain Cast Iron Grates & Stainless Steel Build for Fast Heating, Easy Cleaning, Ideal for Outdoor Kitchens, Patios & Backyards
Overview: Veralune’s 4+1 Burner Grill merges commercial-grade power with user-friendly design, targeting hosts who prioritize speed, flavor, and effortless cleanup for frequent entertaining.
What Makes It Stand Out: The 13,000 BTU infrared side burner excels at precise tasks like simmering sauces, while porcelain-enameled cast iron grates ensure rust resistance and superior searing. Unique oil drain plates double heat retention and simplify grease management, reducing flare-ups and speeding cleaning.
Value for Money: At its price point, the 55,000 BTUs, 548 sq in total cooking area, and stainless cabinet outperform similarly priced rivals. The infrared burner adds versatility missing in budget models, justifying a slight premium for serious entertainers.
Strengths and Weaknesses: Strengths: Excellent heat distribution; easy-clean porcelain surfaces; versatile side burner; sturdy storage cabinet. Weaknesses: Warming rack smaller than competitors; casters lack brakes; assembly instructions could be clearer.
Bottom Line: Highly recommended for frequent entertainers wanting reliability, flavor depth, and low-maintenance operation in a mid-range package.
4. SKOK 4+1 Burners Gas Grill with Infrared Side Burners, Outdoor BBQ Grill with Cast Iron Grates, Barbecue Grill with Wheels, 60,000BTU Output
Overview: The SKOK 4+1 Burner Grill is engineered for speed demons and flavor chasers, leveraging intense infrared tech to deliver restaurant-style results at home with remarkable efficiency.
What Makes It Stand Out: Its infrared burner hits 1,100°F in 30 seconds—twice as fast as conventional burners—locking in juices with minimal flare-ups. The included wood smoker box infuses authentic smokiness, while 598.8 sq in cooking space and 92 sq in sear zone accommodate large feasts.
Value for Money: Competitive pricing for 60,000 BTUs and infrared capabilities, though SKOK’s brand longevity lags behind giants like Weber. The smoker box adds $20+ value, but stainless steel thickness feels thinner than premium alternatives.
Strengths and Weaknesses: Strengths: Unmatched searing speed; versatile smoker box; spacious layout; smooth-rolling casters. Weaknesses: Build quality less robust than top-tier brands; thermometer accuracy inconsistent; infrared burner consumes fuel faster.
Bottom Line: A thrilling choice for performance-focused users craving sear marks and smoky depth, but verify long-term durability expectations before buying.
5. Veralune 4 Burner Gas Grill with Side Burner, 4 Burner Outdoor Cooking Grill with Infrared Side Burner, Outdoor BBQ Grill with Oil Tray, Built-in Thermometer, Enameled Cast Iron Grates, 55,000 BTU
Overview: This Veralune model refines outdoor cooking with a balanced blend of power, portability, and practical features, ideal for mobile grilling across varied backyard setups.
What Makes It Stand Out: The infrared side burner enables simultaneous searing and simmering, while two sturdy wheels (vs. four on rivals) provide agile maneuverability on uneven terrain. Porcelain-enameled cast iron grates resist rust without sacrificing heat retention, and the removable grease tray streamlines cleanup.
Value for Money: Excellent for its price, offering 55,000 BTUs and infrared versatility where competitors charge more. The compact footprint and mobility suit small spaces, though the 402 sq in cooking area is modest for large groups.
Strengths and Weaknesses: Strengths: Effortless portability; rust-proof grates; intuitive grease management; dual-purpose side table/burner. Weaknesses: Smaller cooking surface; wheels lack stability on slopes; assembly requires patience.
Bottom Line: Perfect for renters or dynamic outdoor spaces needing a versatile, movable grill—prioritize it if agility trumps massive capacity.
6. Monument Grills Outdoor Barbecue Stainless Steel 4 Burner Propane Gas Grill, 62,000 BTU Patio Garden Barbecue Grill with Side Burner, Infrared Technology and Knob Controls, Mesa415BZ with BBQ Cover
Overview: This 4-burner propane grill delivers robust performance for dedicated backyard chefs, featuring infrared searing technology and a comprehensive 630 sq in cooking surface (450 sq in primary + 180 sq in warming rack). Its stainless steel construction and included cover target durability and weather resistance. What Makes It Stand Out: The specialized U-shaped sear zone reaches 650°F in 10 minutes, significantly outperforming conventional burners by eliminating hot spots. The ClearView lid with integrated temperature gauge allows food monitoring without heat loss, while intuitive color-coded knob lights (white for off, red for high) enhance usability, especially at night. Value for Money: Priced competitively for its class, it offers premium features like infrared searing, stainless steel burners, and a side burner typically found in costlier models. The included cover adds immediate value, protecting your investment against the elements without extra cost. Strengths and Weaknesses: Strengths: Efficient high-heat searing, clear lid window, useful knob lighting, solid stainless steel build, included cover. Weaknesses: Total cooking area is smaller than larger Monument models (723 sq in), warming rack space is modest, and the 62,000 BTU output is slightly lower than some competitors. Bottom Line: An excellent mid-range grill for enthusiasts seeking powerful searing and user-friendly features. Its efficient heat management and thoughtful design justify the price, making it a strong recommendation for serious home grillers needing reliability.
7. Monument Grills Larger 4-Burner Propane Gas Grills Stainless Steel Cabinet Style with Infrared Side Sear & Side Burners Knob Controls Built-In Thermometer with Stainless Steel Rotisserie Kit(2 Items)
Overview: This expansive cabinet-style grill boasts 72,000 BTU output and a massive 723 sq in cooking surface (513 sq in primary + 210 sq in warming rack), designed for large gatherings. It includes a rotisserie kit, enhancing versatility for whole-meat cooking. What Makes It Stand Out: The combination of four main burners, a dedicated side burner, and a high-heat infrared sear burner provides exceptional cooking flexibility. Porcelain-coated cast iron grates ensure even heat retention and superior searing, while the ClearView window and knob lights enable convenient nighttime grilling without heat loss. Value for Money: The included stainless steel rotisserie kit significantly boosts value, adding a premium cooking method often sold separately. The sheer cooking capacity and durable stainless steel construction justify a higher price point compared to basic 4-burner models, offering long-term utility for frequent entertainers. Strengths and Weaknesses: Strengths: Huge cooking area, versatile 4+2 burner setup with dedicated sear, excellent heat distribution via cast iron grates and flame tamers, rotisserie included, robust stainless build. Weaknesses: Premium price reflects its size/features, assembly may be complex, and the large footprint requires significant patio space. Bottom Line: A top-tier choice for entertainers needing maximum capacity and versatility. The included rotisserie and superior heat management make it a worthwhile investment for those regularly hosting large BBQs, delivering professional results at home.
8. BIG HORN OUTDOORS 1500°F Small Infrared Propane Gas Grill – Portable Steak Broiler & Sear Station, Outdoor Salamander BBQ with Pizza Stone, Stainless Steel
Overview: This ultra-compact, portable infrared grill is engineered for intense, rapid searing, reaching 1500°F in 3-5 minutes. Designed as a dedicated steak broiler or sear station, it features top-down infrared heating and includes a pizza stone. What Makes It Stand Out: Its restaurant-style top-down infrared technology (19,000 BTU) delivers unmatched searing power for steaks and chops, locking in juices with minimal smoke. The windproof pulse ignition, 10-tier adjustable rack for precise heat control, and included pizza stone make it uniquely versatile for its diminutive size. Value for Money: While specialized, it offers exceptional value as a dedicated searing tool or portable grill. The durable stainless steel construction, dishwasher-safe parts, and included accessories (pizza stone, rack) provide solid utility for the price, especially for steak enthusiasts or campers. Strengths and Weaknesses: Strengths: Unbeatable 1500°F sear, rapid heat-up, portable design, easy pulse ignition, versatile rack adjustment, pizza stone included, easy cleanup. Weaknesses: Very limited cooking area (13" chamber), not suitable for large meals or indirect cooking, specialized function (primarily searing). Bottom Line: An outstanding niche product for achieving restaurant-quality sears at home or on the go. Highly recommended for steak lovers or as a supplementary sear station, though its limited capacity means it won’t replace a primary grill.
9. Monument Grills Larger 4-Burner Propane Gas Grills Stainless Steel Cabinet Style with Infrared Side Sear & Side Burners with Cooking Plate(2 Items), Outdoor Use
Overview: Sharing core specs with Product 7 (72,000 BTU, 723 sq in cooking surface), this Monument grill variant emphasizes versatility with the inclusion of a flat cooking plate instead of a rotisserie kit, catering to diverse cooking styles. What Makes It Stand Out: The powerful 4+2 burner system (main, sear, side) remains its core strength, but the included flat-top cooking plate adds significant versatility for pancakes, eggs, stir-fries, or delicate fish. Cast iron grates and flame tamers ensure even heat, while the ClearView window and knob lights enhance usability. Value for Money: The cooking plate adds substantial value over standard grills, transforming it into a multi-functional outdoor kitchen. This accessory, combined with the massive capacity and stainless steel durability, makes it a compelling package for the price, especially for families wanting varied cooking options. Strengths and Weaknesses: Strengths: Huge cooking space, versatile burner setup with dedicated sear, included flat-top plate expands cooking methods, cast iron grates for even heat, ClearView window, durable build. Weaknesses: High cost, substantial size requires ample space, flat plate may be less appealing than rotisserie for some users. Bottom Line: An exceptional choice for those prioritizing cooking versatility beyond traditional grilling. The included flat-top plate makes it ideal for breakfasts, delicate foods, or diverse cuisines, earning a strong recommendation for adaptable outdoor cooking.
10. ADREAK Propane Gas Grill, 4+1 Stainless Steel Barbecue Grill with Infrared Side Burner for Outdoor Cooking, Black
Overview: This 5-burner (4 main + 1 side) grill emphasizes high-heat versatility with a focus on its powerful infrared side burner, offering 371 sq in primary cooking space plus a warming rack and side burner. What Makes It Stand Out: The standout feature is the infrared side burner hitting 1800°F in 30 seconds for instant, intense searing. Five independent 10,000 BTU main burners provide precise zone control, while the included removable smoker box adds flavor-enhancing capability not always standard. Value for Money: The combination of five main burners, a super-hot infrared sear station, and a smoker box at this price point offers strong value. It delivers professional-level searing and smoking features typically found in more expensive grills, maximizing functionality per dollar. Strengths and Weaknesses: Strengths: Extremely fast infrared sear burner (1800°F), five independent main burners for precise control, included smoker box, durable enameled cast iron grates, good total cooking area (599 sq in combined). Weaknesses: Total BTU (40,000) is lower than Monument’s 72k models, warming rack/side burner area is smaller, design is less premium than all-stainless competitors. Bottom Line: A highly capable and versatile workhorse, especially for searing enthusiasts. The exceptional infrared burner and included smoker box make it a smart buy for those seeking maximum cooking flexibility without the highest-end price tag.
Understanding the Root Causes of Uneven Heating
How Traditional Gas Grills Struggle with Heat Distribution
Conventional gas grills primarily use convection heating, where burners heat the air inside the cooking chamber. This air then circulates (often unevenly) to cook the food. Airflow is easily disrupted by wind, lid openings, or even the placement of food itself. Burner design flaws, like gaps between burner sections or poor reflector placement, create significant hot and cold spots. Heat tends to pool directly over burners while edges and corners remain frustratingly cool, forcing constant food rotation and making zone cooking nearly impossible without meticulous management.
Why Radiant Heat Solves the Core Problem
Infrared grills operate on a different principle: radiant heat transfer. Instead of heating air, the infrared emitter (usually a ceramic tile or metal plate heated by gas) glows intensely, emitting electromagnetic waves that directly penetrate and heat the food’s surface molecules. This radiant energy isn’t easily deflected by wind or minor lid lifts like convective heat. Crucially, a well-designed infrared system creates a broad, uniform “heat blanket” across the cooking surface because the emitter itself becomes the primary, consistent heat source, minimizing the reliance on unstable air currents for even cooking.
Key Infrared Grill Features That Guarantee Even Heating
The Critical Role of Emitter Material and Design
The emitter is the heart of infrared performance. Dense, high-quality ceramic tiles absorb and re-radiate heat more evenly than thinner metals, which can develop hot spots over burner ports. Seamless emitter designs or tightly interlocking tiles prevent gaps where heat can escape unevenly. Look for emitters specifically engineered for thermal uniformity—avoid models where the emitter visibly shows distinct burner ports underneath, as this often leads to striped cooking results.
Burner Configuration Under the Emitter
What happens beneath the emitter matters immensely. A single, continuous ribbon burner running the full length of the emitter provides vastly superior heat distribution compared to multiple short burners with gaps between them. Seamless burner tubes ensure consistent gas flow and flame contact across the entire emitter surface. Models using segmented burners often create noticeable temperature variations corresponding to the burner sections, undermining the infrared advantage.
Heat Distribution Plates and Reflectors
Many advanced infrared grills incorporate secondary heat distribution elements above the emitter. Thin, perforated metal plates or specialized reflectors sit just below the cooking grates. These components absorb intense radiant energy from the emitter and re-radiate it in a more diffuse, even pattern across the cooking zone. They act as a thermal buffer, smoothing out any minor inconsistencies from the emitter itself and ensuring the heat reaching your food is remarkably uniform.
Precision in Cooking Grid Construction
The cooking grates themselves play a surprising role. Thick, heavy cast stainless steel or cast iron grates absorb and retain heat effectively, acting as secondary heat reservoirs that help even out minor fluctuations. Grates with a consistent, tight grid pattern (rather than widely spaced rods) promote better contact heat and reduce the chance of food sitting directly over cooler gaps. Ensure the grate sits perfectly flat and makes solid contact with the heat distribution system below.
Optimizing Your Setup and Technique for Perfection
Preheating Rituals That Make a Difference
Rushing preheat is a cardinal sin with infrared. These grills require a longer, more thorough preheat (often 10-15 minutes) than conventional models. This allows the emitter, distribution plates, and grates to reach full, stable thermal saturation. Skipping this step means the system hasn’t achieved its designed equilibrium, leading to inconsistent results. Always preheat with the lid closed until the entire cooking surface reads uniformly hot on an infrared thermometer.
Strategic Food Placement Based on Heat Zones
Even the best infrared grills benefit from intentional food placement. Understand your grill’s natural gradient—most will still have a slightly hotter zone directly over the emitter’s center. Place thicker, denser items (like roasts or large steaks) in the hottest zone initially for searing, then move them towards the edges as they cook through. Delicate items like fish or vegetables often thrive slightly off-center where the heat is intense but less aggressive. Never overload the grill, as this creates localized cooling spots.
Mastering Lid Management for Consistent Results
One of infrared’s strengths is reduced sensitivity to lid openings compared to convection grills, but it’s not immunity. Frequent or prolonged lid lifts still cause significant heat loss and disrupt the radiant environment. Develop the habit of checking food minimally and quickly, using the lid as a tool to control heat intensity (slightly ajar for lower temps). Remember, infrared sears quickly—resist the urge to peek constantly; trust the preheat and timing.
Calibration and Maintenance for Long-Term Consistency
Over time, grease buildup, food debris, or minor misalignments can sabotage even heating. Regularly clean the emitter surface (following manufacturer guidelines—often just brushing when hot), inspect burner ports for clogs, and ensure all components sit flush. Some higher-end models feature adjustable air shutters on the burners; learning to fine-tune these can help compensate for minor imbalances as the grill ages. Consistent performance requires consistent care.
Material Science and Build Quality Impact
Why Frame and Lid Construction Affects Heat Retention
A flimsy, thin lid acts like a sieve for heat, especially radiant energy. Heavy-duty, double-walled stainless steel lids with quality insulation (like ceramic fiber) trap heat effectively, maintaining the stable, high-temperature environment crucial for even infrared cooking. Similarly, a rigid frame prevents warping that could misalign critical heat distribution components over time, directly impacting cooking surface uniformity.
Insulation’s Hidden Role in Temperature Stability
Beyond the lid, internal insulation surrounding the firebox and cooking chamber is vital. Quality insulation minimizes heat loss to the outside environment, ensuring more energy is directed towards cooking the food evenly. This is particularly important for maintaining consistent temperatures during extended cooks or in cooler weather, preventing the edges of the cooking surface from cooling faster than the center.
The Importance of Tight Seals and Gaskets
Air leaks around the lid, grease tray, or access panels allow precious heated air to escape and cold air to infiltrate. This disrupts the carefully controlled thermal environment. High-quality infrared grills feature robust, heat-resistant gaskets that create a near-airtight seal when the lid is closed. Check for tight closure and inspect gaskets periodically for wear—they’re a small part that has an outsized impact on even heating.
Navigating Advanced Controls and Technology
The Value of Independent Zone Control
For larger grills, independent burner zones controlled by separate knobs are non-negotiable for true versatility and even cooking. This allows you to create distinct high-heat searing zones and lower-temperature finishing or warming zones simultaneously. Crucially, well-designed zone control ensures that turning one zone on or off doesn’t cause significant temperature fluctuations in adjacent zones, maintaining overall stability.
Digital Thermometers: Accuracy Beyond the Lid Gauge
The built-in lid thermometer is often notoriously inaccurate, giving a false sense of the actual cooking surface temperature. Investing in a high-quality, instant-read infrared thermometer is essential for diagnosing uneven heating and verifying true temperatures across different zones. Some premium grills now integrate reliable, multi-probe thermometers directly into the control system, providing real-time, accurate feedback.
Smart Features That Enhance Consistency
While not essential, certain smart technologies can aid consistency. Programmable temperature controllers that modulate gas flow to maintain a precise setpoint reduce manual adjustment errors. Wi-Fi connectivity for remote monitoring allows you to track temperature stability without lifting the lid. Look for features that genuinely contribute to maintaining a steady thermal environment, not just gimmicks.
Frequently Asked Questions
How does infrared heating actually prevent hot and cold spots compared to regular grills?
Infrared grills use radiant heat that travels directly to the food, bypassing air circulation issues. The emitter surface itself becomes a large, uniform heat source, creating consistent energy across the cooking zone rather than relying on unevenly heated air currents common in traditional grills.
Do I still need to rotate food on an infrared grill for even cooking?
With a well-designed infrared system, significant rotation is usually unnecessary. The radiant heat is so uniform that food cooks evenly across the surface. Minor adjustments might be needed based on natural grill gradients or food thickness, but the constant juggling required on conventional grills is eliminated.
Can flare-ups cause uneven heating on infrared grills?
Flare-ups are significantly reduced on infrared grills because the intense heat vaporizes drippings before they can ignite on the burner. Any minor flare-ups that occur are typically brief and localized, having minimal impact on overall cooking surface temperature uniformity compared to convection grills.
Why do some infrared grills still have uneven heating despite the technology?
Poor emitter design (gaps, thin materials), segmented burners instead of continuous ones, inadequate heat distribution plates, or low-quality construction can undermine the infrared advantage. Not all infrared grills are engineered equally for optimal heat distribution.
How important is preheating time for even results on an infrared grill?
Preheating is critical—usually 10-15 minutes. This allows the emitter, heat plates, and grates to reach full thermal saturation and stability. Skipping this step means the system hasn’t achieved its designed equilibrium, leading to inconsistent cooking and potential cold spots.
Will wind affect the even heating performance of my infrared grill?
Infrared grills are far less susceptible to wind than conventional grills because they rely on radiant heat, not convective air currents. While extreme wind can cause some cooling, the direct transfer of energy to the food minimizes disruption, maintaining much better temperature consistency across the cooking surface.
Are higher BTU ratings necessary for better even heating on infrared grills?
Not necessarily. BTUs measure total gas input, not cooking efficiency or distribution. A well-designed infrared system with moderate BTUs can deliver more even, effective heat than a high-BTU conventional grill. Focus on emitter quality and heat distribution features over raw BTU numbers.
Can I use a pizza stone or baking steel effectively on an infrared grill for even baking?
Yes, and it’s often ideal. The intense, even radiant heat transfers efficiently to dense materials like stone or steel. Preheat the stone thoroughly on the grill—its thermal mass will then provide an exceptionally consistent baking surface, eliminating the hot spots common in oven baking.
How do I test if my infrared grill is heating evenly?
After a full preheat, scatter slices of white bread evenly across the cooking surface. Close the lid and cook until the bread begins to toast. Lift the lid—uniform golden-brown coloring indicates even heating. Dark spots show hot zones; pale spots reveal cold zones needing investigation.
Does the type of gas (propane vs. natural gas) affect infrared heating consistency?
The gas type itself doesn’t inherently change the infrared heating principle. However, proper conversion and regulator setup for your specific gas type are crucial. An incorrectly configured system (e.g., wrong orifice size) can lead to improper gas pressure, causing burner performance issues and uneven heating regardless of the infrared technology.
See Also
- How to Solve Uneven Cooking with the 10 Best Infrared Gas Grills in 2026
- Stop Uneven Heating with the 10 Best Infrared Gas Grills This Year
- How to Solve Uneven Heating with the 10 Best Infrared Grills in 2026
- How to Solve Uneven Heating with the 10 Best Freestanding Electric Grills in 2026
- How to Solve Inconsistent Heat with the 10 Best Infrared Gas Grills in 2026