For anyone who grills regularly, the hassle of managing propane tanks becomes a constant background annoyance—running out mid-cookout, forgetting to refill, or storing bulky cylinders. A direct natural gas line eliminates that friction entirely, delivering a permanent fuel source that’s always ready to fire up the burners.
I’m Mohammad Maruf — the founder and writer behind AirfryerBite. I’ve spent years analyzing grilling hardware, comparing burner configurations, BTUs, and material quality across dozens of models to understand what separates a backyard burner that’s built to last from one that’s just shiny sheet metal.
Finding a reliable best outdoor natural gas grill means looking past marketing claims and focusing on the spec sheet details that determine real cooking performance, even heat distribution, and long-term durability against the elements.
How To Choose The Best Outdoor Natural Gas Grill
Not all natural gas grills are created equal. The permanent connection to your home’s gas line demands extra attention to build quality, burner reliability, and material resistance to corrosion. Here are the critical factors to evaluate before buying.
Burner Construction
Stainless steel burners, especially 304-grade, resist rust and corrosion far better than painted steel or lower-quality alloys. Tube diameter and the number of burners (3 to 6 main burners is common) influence how evenly heat spreads across the cooking surface. Look for raised flame openings that minimize debris clogging.
Cooking Grate Material
Porcelain-enameled cast iron retains heat exceptionally well for searing and holds steady temperatures, but it’s heavier. Stainless steel grates heat quickly and are easier to clean, though they may not sear as aggressively. The grate thickness and bar spacing also affect grill mark quality.
Flame Tamers and Grease Management
Flame tamers (often called heat tents or FLAVORIZER bars) sit above the burners to vaporize drippings for smoke flavor and prevent flare-ups. They should be stainless steel or porcelain-coated. A well-designed grease management system with a removable tray makes cleanup significantly easier.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Monument Grills 4-Burner NG | Mid-Range | First-time NG conversion | 60,000 BTU / 700 sq in | Amazon |
| Monument Grills 4+2 Burner | Mid-Range | Searing and side cooking | 72,000 BTU / 723 sq in | Amazon |
| Charbroil Pro Series 4-Burner | Mid-Range | Modular cooking (griddle/charcoal) | 45,000 BTU / 535 sq in | Amazon |
| Weber Genesis E-315 NG | Premium | Consistent heat and flavor | PureBlu burners / 3 burner | Amazon |
| Spire 5-Burner Built-In | Premium | Built-in island installation | 63,000 BTU / 750 sq in | Amazon |
| Brand-Man 5-Burner Island | Mid-Range | Storage and prep space | 52,000 BTU / 669 sq in | Amazon |
| Weber Genesis S-315 NG | Premium | Stainless steel durability | SS grates / 641 sq in | Amazon |
| Weber Genesis E-325 NG | Premium | Dedicated sear zone | Sear Zone / 3 burner | Amazon |
| Spire 6-Burner Built-In | Premium | Large built-in entertaining | 73,000 BTU / 904 sq in | Amazon |
| Weber Genesis E-335 NG | Premium | Side burner and storage | 3 burners + side burner | Amazon |
| Bull Outlaw 30-Inch NG | Premium | Built-in heavy-duty use | 60,000 BTU / 575 sq in | Amazon |
In‑Depth Reviews
1. Weber Genesis E-315 Natural Gas Grill
The Weber Genesis E-315 is the reference standard for mid-sized natural gas grilling. Its three PureBlu burners feature a tapered design that delivers consistent flame across the entire cooking surface, and the raised flame openings help keep debris from clogging the ports. The 648-square-inch total cooking area includes a 468-square-inch primary space and a warming rack that handles buns or smaller items during the main cook.
Porcelain-enameled cast-iron grates retain heat aggressively for searing, and the FLAVORIZER bars catch drippings to create smoke while funneling grease away from the burners. The grease management system slides out from under the cookbox for easy disposal, and the Weber Crafted accessory ecosystem adds a pizza stone, griddle, or sear grate. Assembly takes a couple of hours, but the build quality is well above most competitors at this range.
The E-315 runs on natural gas from the factory, so there is no conversion kit to buy or install. Side tables keep tools and plates within reach, and the overall footprint fits standard patio spaces without dominating the layout. For most serious backyard cooks, this grill delivers the best balance of even heat, durability, and serviceability.
Why it’s great
- Factory natural gas, no conversion required
- PureBlu burners provide even, clog-resistant flame
- Excellent grease management with pull-out tray
Good to know
- Assembly takes 1.5 to 2.5 hours
- Warming rack is relatively shallow
2. Monument Grills Larger 4+2 Burner Propane Gas Grill
The Monument 4+2 burner grill packs 72,000 BTU across four main burners plus a dedicated side burner and a high-heat infrared sear station. The 723-square-inch total cooking surface (510 square inches primary, 190 warming rack) supports large gatherings, and the ClearView lid window lets you check food without lifting the hood and losing heat.
Porcelain-coated cast-iron grates distribute heat evenly, and the stainless steel flame tamers help prevent flare-ups while adding smoky flavor. The illuminated knobs are useful for nighttime grilling, and the sear burner produces intense direct heat for quality steak crust. The unit runs on propane out of the box, but it is compatible with a natural gas conversion kit sold separately. Assembly is involved, and some reviewers note that the cabinet construction feels lighter than premium-priced alternatives.
For grillers who want a sear station alongside standard burners without stepping into four-figure pricing, this Monument model hits a strong value point. The side burner is handy for sauces or sides, and the enclosed cabinet offers storage for propane tanks or grill tools.
Why it’s great
- Infrared sear burner adds high-heat capability
- ClearView window reduces heat loss when checking food
- Illuminated knob controls for low-light conditions
Good to know
- Requires separate conversion kit for natural gas
- Side burner struggles to maintain low simmer
3. Charbroil Pro Series 4-Burner with Amplifire Infrared
Charbroil’s Pro Series stands out because of its modular cooking system. The Amplifire infrared technology powers the gas grill, but you can swap in a cold-rolled steel griddle or a Gas2Coal charcoal tray (sold separately) to change cooking methods in under 90 seconds. The 535-square-inch primary area fits up to 25 burgers, and the 155-square-inch warming rack handles indirect cooking.
The four burners produce 45,000 BTU total, which is lower than many competitors, but the infrared cooking system is designed for fuel efficiency and even heat distribution rather than raw max output. The porcelain-coated cast-iron grates resist rust and leave distinct sear marks. The side burner adds capacity for sides or sauces, and the two large wheels plus locking casters make relocation straightforward.
Assembly reveals some unclear steps in the manual, but the finished build feels solid for its class. The griddle insert is a genuine bonus for breakfast cooks or smash burgers, and the 10-year burner warranty covers long-term peace of mind. This is a versatile option for someone who wants gas grilling with the flexibility to griddle or charcoal grill occasionally.
Why it’s great
- Modular system supports griddle and charcoal cooking
- Infrared design helps prevent flare-ups
- 10-year burner warranty
Good to know
- 45,000 BTU total is lower than many 4-burner grills
- Interior cleaning can be challenging
4. Weber Genesis S-315 Natural Gas Grill
The Weber Genesis S-315 is the stainless steel variant of the E-315, sharing the same PureBlu burner architecture but upgrading to stainless steel cooking grates. These grates heat quickly and are highly corrosion-resistant, though they don’t hold heat as aggressively as cast iron for searing. The 641-square-inch total cooking area includes a 468-square-inch primary surface.
FLAVORIZER bars sit between the burners and the grates to vaporize drippings and prevent flare-ups, and the grease management system slides out for quick disposal. The S-315 is a factory natural gas model, so no conversion is needed. The stainless steel finish visually matches high-end outdoor kitchen setups better than the painted black E-315, and the material resists rust in coastal or high-humidity environments.
Assembly is comparable to the E-315, and some recent production complaints mention lighter-gauge side panels and exposed cabinet areas that may collect water. Still, the overall build quality, consistent heat distribution, and Weber’s service network make this a solid choice for buyers who want stainless aesthetics without stepping into built-in territory.
Why it’s great
- Factory natural gas, no conversion kit needed
- Stainless steel grates resist corrosion
- Quick heat-up to 550°F in under 10 minutes
Good to know
- Some units show exposed cabinet areas
- Stainless grates don’t sear as hard as cast iron
5. Spire Premium 5 Burner Built-In Gas Grill
The Spire 5-burner built-in head is designed for permanent installation into an outdoor kitchen island. Five 10,000 BTU main burners combine with a 13,000 BTU rear rotisserie burner to deliver 63,000 BTU total across 750 square inches of cooking space. The 304 stainless steel grates are non-stick and rust-resistant, providing even heat distribution with no hot spots.
The dual-fuel compatibility means it ships configured for propane but includes the parts and instructions for natural gas conversion—though some installations require ordering a separate conversion kit and swapping burner orifices. Interior lights make it easier to monitor food at night, and the removable drip pans simplify cleaning. The construction uses thick stainless steel throughout, which contributes to the unit’s weight and heat retention.
Spire’s design targets the built-in market with a polished stainless finish that matches premium outdoor kitchens. The rear burner adds rotisserie capability, a feature often missing in similarly priced freestanding grills. For anyone planning a permanent grill island, the Spire 5-burner delivers a strong feature set for the footprint.
Why it’s great
- Dual-fuel compatibility with straightforward NG conversion
- Rear rotisserie burner adds cooking flexibility
- Thick 304 stainless steel for even heat and durability
Good to know
- Gas conversion kit may need to be sourced separately
- Lacks insulated grill jacket for some code environments
6. Brand-Man 5-Burner Propane Gas Grill Island
The Brand-Man 5-burner island grill combines a 480-square-inch primary cooking area with a 189-square-inch warming rack, plus an extra cast iron griddle plate included in the box. The 52,000 BTU output across five stainless steel burners provides solid heat for large cookouts, and the side burner adds a dedicated station for sides.
Storage is the standout feature here—there are enclosed cabinets below for tools and supplies, plus a foldable prep station that expands counter space when needed. The double-layer lid helps with heat retention, and the porcelain-enameled cast iron grates distribute heat evenly. Natural gas conversion requires a separate kit, but the burners and fittings are designed to accept the switch.
Assembly takes time and ideally needs two people, but the finished build is sturdy and the matte black finish looks modern on patios and decks. The fold-out table is particularly useful for prep or serving, and the paper towel holder keeps essentials accessible. For those who value storage capacity alongside grilling performance, this island unit offers a strong package.
Why it’s great
- Extra cast iron griddle plate included
- Foldable prep station and enclosed storage
- Double-layer lid enhances heat retention
Good to know
- Natural gas conversion kit sold separately
- Assembly is labor-intensive
7. Monument Grills Larger 4 Burner Natural Gas Convertible
Monument’s 4-burner cabinet-style grill offers 60,000 BTU across four 304 stainless steel burners plus a side burner, with a total cooking area of 700 square inches (510 primary, 190 warming rack). The unit is designed to operate with both propane and natural gas—simply purchase the Monument Conversion Kit (sold separately) to switch fuel types without replacing internal components.
The porcelain-coated cast iron cooking grates are enameled for easier cleaning and chip resistance, and the Clearview lid lets you monitor food without opening the hood. The cabinet provides enclosed storage, and the brushed stainless finish fits most outdoor setups. Users report reaching near 700°F for high-heat grilling, and assembly, while involved, produces a sturdy structure.
This grill appeals to buyers who want the flexibility to start with propane and convert to natural gas later, or who have a gas line and want a straightforward conversion process. The 60,000 BTU output is competitive for the price tier, and the viewing window is a practical addition for heat retention.
Why it’s great
- Dual-fuel design allows easy NG conversion
- ClearView lid for checking food without heat loss
- Enamel-coated cast iron grates resist chipping
Good to know
- Conversion kit purchased separately
- Assembly instructions have minor clarity gaps
8. Weber Genesis E-325 Natural Gas Grill
The Weber Genesis E-325 adds an extra-large sear zone to the standard E-315 formula, giving you a dedicated area of intense heat for achieving crust on steaks and burgers without overheating the rest of the cooking surface. The three PureBlu burners and porcelain-enameled cast-iron grates maintain the same even heat profile that Weber is known for.
The FLAVORIZER bars catch drippings for smoke flavor while hoisting grease away from the burners, and the grease management tray slides out for easy disposal. The E-325 is factory-configured for natural gas, so no conversion is necessary. The extra searing capacity makes it ideal for cooks who prioritize steak and chop preparation alongside larger indirect-heat cooking.
Some buyers note that the lower heat setting can cause the grill to cut gas flow, and the greased catch pan may feel small for extended cooks. Assembly is about two hours. Overall, the E-325 serves the user who wants Weber reliability plus a dedicated high-heat zone without stepping up to a four-burner chassis.
Why it’s great
- Dedicated extra-large sear zone for intense heat
- Factory natural gas, no conversion kit needed
- Porcelain enamel cast-iron grates retain heat for searing
Good to know
- Low heat setting may intermittently cut gas
- Grease catch pan is on the smaller side
9. Spire Premium 6 Burner Built-In Gas Grill
The Spire 6-burner built-in head expands on the 5-burner design with six 10,000 BTU main burners plus a rear rotisserie burner for 73,000 BTU total. The 904-square-inch total cooking space includes a massive primary area plus a warming rack, making it one of the largest built-in options in this range. The 304 stainless steel grates and frame resist rust and provide excellent heat distribution.
Dual-fuel compatibility means the grill ships for propane but can be converted to natural gas with the appropriate kit and orifice changes. Interior lights assist nighttime monitoring, and the removable drip pans keep cleanup manageable even after big cooks. The polished stainless finish blends well with stone or tile outdoor kitchen counters.
Buyers report flawless natural gas conversion when following the included instructions, though some note that an insulated grill jacket may be needed for local code compliance. The heat-up time is fast thanks to the thick stainless steel construction, and the rear burner allows rotisserie cooking for large cuts of meat. For permanent island installations with frequent large gatherings, this Spire model provides a commanding cooking platform.
Why it’s great
- Six main burners plus rear rotisserie burner
- 904 square inches handles large cooks
- Thick 304 stainless for even heat and durability
Good to know
- Natural gas conversion may require extra parts
- Insulated jacket not included for code compliance
10. Weber Genesis E-335 Natural Gas Grill
The Weber Genesis E-335 builds on the E-315 platform by adding a dedicated side burner and a storage locker built into the cart. The three PureBlu burners and sear zone remain unchanged, but the side burner expands capacity for sauces, sides, or sautéing vegetables without crowding the main grates. The storage locker accepts large grillware and tools.
The porcelain-enameled cast-iron grates and FLAVORIZER bars deliver the same even heat and flare-up protection as the other Genesis models. The side burner operates independently from the main burners, adding flexibility for multi-dish meals. The E-335 ships as a factory natural gas unit, eliminating conversion complexity.
Some owners have reported interior corrosion issues on the griddle insert and heat shields after a few months, though the main grill components hold up well under normal use. The searing station produces excellent results, and the consistent temperature control works well for both direct and indirect cooking. For those who regularly cook sides on the grill, the integrated side burner is a meaningful upgrade over the E-315.
Why it’s great
- Integrated side burner for sauces and sides
- Storage locker for large tools and accessories
- Sear zone delivers high heat for crust formation
Good to know
- Some interior components show corrosion over time
- Assembly requires careful attention to instructions
11. Bull Outlaw 30-Inch Built-In Natural Gas Grill
The Bull Outlaw 30-Inch built-in grill is a heavy-duty permanent installation designed for outdoor kitchens. Four welded 304 stainless steel burners deliver 60,000 BTU (15,000 each), and the single-piece dual-lined hood retains heat effectively even in windy conditions. The 575-square-inch total cooking area includes a 399-square-inch primary surface and a 176-square-inch warming rack.
Piezo igniters on every valve ensure reliable startup, and the zinc control knobs resist corrosion in outdoor environments. The grill is configured for natural gas out of the box, with no conversion required. The construction is notably heavy—the unit arrives fully assembled but requires help to position into an island cutout. The flame tamers use a design that distributes heat more evenly than some competitors.
Some users note that burners may extinguish in strong wind with the hood closed, and the built-in thermometer only reads up to 600°F. The stainless steel grates are sturdy and heat quickly, reaching over 500°F within five minutes. For anyone investing in a permanent outdoor kitchen, the Bull Outlaw delivers commercial-grade build quality with a straightforward natural gas connection.
Why it’s great
- Factory natural gas, no conversion kit needed
- Four 304 stainless steel burners with Piezo igniters
- Single-piece dual-lined hood for superior heat retention
Good to know
- Burners may be sensitive to strong wind
- No cover included for protection between uses
FAQ
Can any propane grill be converted to natural gas?
What size natural gas grill fits my outdoor kitchen cutout?
How do I install a natural gas line for my grill?
Do natural gas grills cook differently than propane grills?
Final Thoughts: The Verdict
For most users, the best outdoor natural gas grill winner is the Weber Genesis E-315 because it delivers factory natural gas compatibility, PureBlu burner evenness, and a proven grease management system in a package that balances performance and value. If you want a dedicated sear zone for steaks, grab the Weber Genesis E-325. And for a permanent built-in installation with rotisserie capability, nothing beats the Spire 6-Burner Built-In.










