The central tension in outdoor cooking has always been fuel choice. A propane burner delivers immediate, controllable heat for quick weeknight burgers, but it cannot produce the campfire soul that charcoal and wood impart to a slow-smoked brisket. A combo grill solves this by placing both systems side by side in a single frame, allowing you to sear a steak on gas while a pork shoulder takes on smoke from a charcoal chamber a few inches away. The trick is finding a unit where neither fuel system feels like an afterthought.
I’m Mo Maruf — the founder and writer behind The Tools Trunk. I’ve spent years analyzing hardware specifications and real-world performance data across the dual-fuel market, from entry-level cart designs to dedicated offset-capable rigs.
Whether you need separate cooking zones for direct and indirect heat or want the option to run both fuels simultaneously for large gatherings, the right combo grill hinges on how well its burners, grates, and temperature controls serve each side independently.
How To Choose The Best Combo Grill
A dual-fuel grill demands evaluation criteria that differ from standalone gas or charcoal units. You are essentially buying two grills in one, so any weakness in either system degrades the entire package. Below are the three factors that separate versatile performers from compromised designs.
Cooking Area Distribution vs. Total Square Inches
Manufacturers often headline total cooking area by combining the gas section, charcoal section, warming rack, and, if present, an offset smoker. The real question is how that area is split between the two fuel zones. A model that allocates a tiny proportion to the charcoal side forces you to squeeze in a few burgers, which defeats the purpose of owning a dual-fuel rig. Look for a primary cooking area that gives roughly equal space to each fuel type — a 50/50 or 60/40 split ensures neither zone feels cramped during a full cook.
Grate Material and Heat Retention
Porcelain-enameled cast iron grates resist rust far better than bare cast iron or standard steel wire. The enamel coating creates a non-stick surface that simplifies cleanup after sticky marinades, while the cast iron core retains heat to produce consistent sear marks. Stainless steel grates are lighter and never rust, but they do not hold temperature as evenly, which matters more on the charcoal side where direct radiant heat is the primary cooking force.
Ash and Grease Management Systems
A combo grill with an inaccessible charcoal chamber becomes a chore every time you need to dump ash. The best designs include a removable ash drawer or a dedicated pan that slides out from the front without lifting grates. On the gas side, a pull-out grease tray with a disposable collection cup prevents flare-ups and keeps the cabinet below the grates from accumulating sticky residue. If either side lacks these features, expect monthly disassembly for deep cleaning.
Quick Comparison
On smaller screens, swipe sideways to see the full table.
| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Oklahoma Joe’s Canyon Combo | Premium | Offset smoking & gas grilling | 36,000 BTU / 750 sq in primary | Amazon |
| Char-Griller Flex Fuel Plus | Premium | Griddle cooking & smoking | 30,000 BTU / 1,260 sq in total | Amazon |
| MFSTUDIO 3-in-1 | Mid-Range | Balanced gas/charcoal capacity | 37,000 BTU / 690 sq in total | Amazon |
| Sophia & William Dual Fuel | Mid-Range | Porcelain-enameled grate durability | 28,650 BTU / 690 sq in total | Amazon |
| Char-Griller E5030 | Mid-Range | Compact dual fuel with smoker | 24,000 BTU / 870 sq in total | Amazon |
| GRILL DEPOTS 2-in-1 | Mid-Range | Versatile griddle & grill plates | 41,500 BTU / 673 sq in total | Amazon |
| Grills House ZH3005-SC | Value | Budget dual-fuel entry | 34,000 BTU / 823 sq in total | Amazon |
| Grills House ZH3005Y-SC | Value | Dual fuel with offset smoker | 34,000 BTU / 1,020 sq in total | Amazon |
| LMNOCHM 4-Burner | Value | Interchangeable griddle/grill inserts | 49,000 BTU / 446 sq in primary | Amazon |
In‑Depth Reviews
1. Oklahoma Joe’s Canyon Combo
Oklahoma Joe’s built its reputation on offset smokers that hold steady temperature for hours, and the Canyon Combo translates that DNA into a dual-fuel frame. The 36,000 BTU three-burner propane side heats quickly and maintains even heat across the full 750-square-inch primary area, while the charcoal firebox doubles as a dedicated smoker with adjustable dampers for precise airflow control. The heavy-gauge steel body and high-temp finish resist rust better than most painted units in this class, and the dual lid-mounted temperature gauges eliminate the guesswork that plagues single-gauge designs.
The firebox grate adds an extra 281 square inches for wings or smaller cuts, bringing the total usable area well past 1,000 square inches. Porcelain-coated cast iron grates hold heat without rusting as quickly as bare iron, and the removable ash pan on the charcoal side makes post-smoke cleanup straightforward. Owners report consistent brisket results with a refuel interval of roughly 25 minutes once the charcoal bed is established.
Four casters would be ideal given the grill’s weight, but it ships with only two locking wheels, which requires caution when rolling over uneven patio pavers. The gas side performs reliably for direct grilling, though the side burner is absent — you will need to keep sauces on an auxiliary burner or inside the house.
What works
- Offset firebox delivers real smoking capability, not just charcoal grilling
- Dual temperature gauges on each lid prevent constant lid lifting
What doesn’t
- Only two casters lock; heavy unit shifts slightly on sloped surfaces
- No side burner for sauces or sides
2. Char-Griller Flex Fuel Plus
The Flex Fuel Plus earns its name by bundling a gas grill, charcoal side, offset smoker, and a pre-seasoned flat-top griddle in a single unit. The flattop griddle swaps directly onto the gas side after removing the grates, which makes it equally viable for smashing burgers at a tailgate or frying bacon without flare-ups. The three stainless steel burners deliver 30,000 BTU, and the adjustable charcoal tray on the charcoal side lets you raise or lower the fire bed to manage temperature for slow smoking or high-heat searing.
Total cooking area reaches 1,260 square inches when you count all four zones, which is enough to handle a full holiday cook for twelve. The dual dampers on the charcoal chamber provide real control over smoke density, and the push-button automatic ignition eliminates the hassle of lighting separate fires. Tool hooks and a side shelf keep utensils within reach, and the charcoal side includes an ash dump that removes directly into a container without dismantling grates.
Several initial units have shown surface rust on the griddle tray soon after exposure to moisture, which contradicts the pre-seasoned claim. The assembly process is labor-intensive and benefits from an impact driver to secure sheet metal panels that do not always align perfectly out of the box.
What works
- Removable griddle insert expands cooking methods beyond grilling and smoking
- Massive total cooking area across four distinct zones
What doesn’t
- Griddle surface susceptible to surface rust without immediate seasoning touch-ups
- Assembly requires significant effort and additional tools
3. MFSTUDIO 3-in-1
The MFSTUDIO 3-in-1 splits its 690 square inches across a gas side with three burners totaling 37,000 BTU and a separate charcoal chamber, each covered by its own double-layer lid. Porcelain-enameled cast iron grates on both sides resist rust and provide the heat retention that thinner wire grates cannot match. The adjustable enameled charcoal tray allows for three height positions, letting you dial in the fire distance for searing versus low-and-slow indirect cooking.
Cleanup is notably simple thanks to a full-size slide-out grease tray under the gas section and a dedicated ash drawer under the charcoal chamber — no scoops or shop vac required. The side burner handles sauces or a side of sautéed peppers without crowding the main cooking surface, and the dual-layered lids include thermometers so you can track temperature on each side independently. Owners report assembly taking roughly an hour thanks to well-labeled hardware and clear instructions.
A small number of users describe uneven heat distribution across the gas burners, particularly toward the outer edges of the cooking area. The included warming rack is stainless steel rather than cast iron, which cleans easily but does not hold residual heat long enough to keep a full platter warm.
What works
- Both fuel zones use porcelain-enameled cast iron grates for even heat
- Separate ash drawer and grease tray simplify post-cook cleanup
What doesn’t
- Gas burner heat can be slightly uneven near the outer edges
- Warming rack lacks heat retention of cast iron
4. Sophia & William Dual Fuel
Sophia & William positions this dual-fuel unit as a direct competitor to the MFSTUDIO at a similar price, and on paper the specs mirror each other closely — 690 square inches total, porcelain-enameled cast iron grates, a side burner, and separate lids for each fuel zone. The gas side uses three burners producing 28,650 BTU plus an 8,530 BTU side burner, while the charcoal side includes a crank-adjustable tray for fire height control. The build quality receives polarized reviews: some buyers praise the sturdy material and even-heating porcelain surface, while others report flimsy sheet metal panels and burners that begin rusting within months.
The slide-out ash tray on the charcoal side works without removing the grates, and the grease tray on the gas side redirects drippings into a disposable collection cup. Side shelves provide enough room for a cutting board and seasoning containers, and the tool hooks keep spatulas and tongs off the grill surface. The assembly instructions are representative of the category — manageable with two people, but not something to tackle alone.
The variance in user experiences suggests quality control inconsistency. Several owners report that the heat shields shift position when sliding food across the grates, which creates cold spots. The gas side delivers adequate heat for standard grilling but struggles to maintain a steady high-temperature sear on windy days.
What works
- Crank-adjustable charcoal tray gives precise fire distance control
- Porcelain-enameled cooking surface is easy to clean
What doesn’t
- Inconsistent build quality between units; some show early rust on burners
- Heat shields shift during cooking, creating uneven spots on the gas side
5. Char-Griller E5030 Dual Function
Char-Griller’s E5030 uses a side-by-side layout with a gas section on the left and a charcoal section on the right, each with its own lid and temperature gauge. The two stainless steel main burners produce 24,000 BTU on the gas side, and the charcoal side includes an EasyDump ash pan that empties directly into a container. The porcelain-coated cast iron grates span both zones, and the electronic ignition lights the gas burners at the push of a button — no need for a lighter or matches.
The 870 square inches of total cooking area is split between the two fuel chambers and a warming rack, providing enough space for about 24 burgers across the primary surfaces. The side shelf and utensil hooks offer reasonable prep space for a grill at this size. Owners report that the charcoal side runs hot, often reaching 400 degrees Fahrenheit or more, and requires careful damper management to bring it down to smoking temperatures. The gas side holds steady at 300 degrees on one low burner and pushes past 500 with both burners on high.
The assembly time is often 3-4 times the manufacturer’s estimate, and some units arrive missing small hardware like lock washers and flat washers. The cooking area dimensions are roughly 40 percent smaller than previous Char-Griller models, which matters if you regularly host large groups. The sheet metal construction feels sturdy, but the matte powder coat scratches easily during assembly.
What works
- Separate lids and temperature gauges for each fuel zone
- EasyDump ash pan simplifies charcoal cleanup
What doesn’t
- Assembly time significantly longer than claimed; potential missing hardware
- Charcoal side runs very hot; achieving low smoking temps requires vent discipline
6. GRILL DEPOTS 2-in-1
GRILL DEPOTS takes a slightly different approach by offering a perforated griddle pan in addition to standard cast iron grill grates, letting you choose between direct flame contact for steaks and a hole-studded surface that allows smoke and heat to pass through fish and vegetables. The three independently adjustable 10,000 BTU burners total 41,500 BTU when including the 9,000 BTU side burner, and the double-layer stainless steel lid resists warping better than single-panel painted lids seen on cheaper rigs.
The 673-square-inch cooking area is smaller than some competitors in this mid-range tier, but the side-by-side gas and charcoal zones provide real dual-fuel flexibility rather than a token charcoal tray. The charcoal side includes a three-level grate height adjustment for controlling fire intensity, and the pull-out oil drip tray directs grease away from the burners to reduce flare-ups. Owners report excellent heat distribution across the gas grates and appreciate that the assembly instructions are clearer than the average combo grill manual.
The sheet metal construction does not match the thickness of heavier-duty units from Char-Griller or Oklahoma Joe’s, and the bottom storage cabinet is essentially an open frame in its stock configuration — some buyers modify it with a metal shelf. The warming rack is small relative to the primary cooking area, and users who cook for more than six people find themselves wishing for extra square footage on the gas side.
What works
- Perforated griddle pan adds versatility for vegetables and fish
- Clear assembly instructions with easy-to-follow steps
What doesn’t
- Sheet metal is thinner than premium competitors
- Total cooking area feels limited for larger crowds
7. Grills House ZH3005-SC
Grills House packs a gas zone, a charcoal zone, and a side burner into a compact frame that delivers 34,000 BTU total — 12,000 BTU per main burner on the gas side and 10,000 BTU for the side burner. The 823 square inches of total cooking area includes 333 square inches on each fuel side plus a 157-square-inch warming rack, which is enough to handle roughly 30 burgers at once. The piezo ignition fires the gas burners without a battery, and the charcoal side features a height-adjustable charcoal pan and a smoke stack for heat control.
The dual lid-mounted thermometers let you monitor each cooking chamber independently, which is a rarity at this price tier. Owners who use the charcoal side report excellent heat output and appreciate the ability to grill with either fuel depending on their mood for smokiness versus convenience. The side burner handles sauces or keeps a pot of beans warm without stealing grill space, and the four locking casters keep the unit stable on uneven patio blocks.
Assembly instructions rely entirely on picture-based diagrams with inconsistent part labeling — letters on parts but numbers in the manual, which causes confusion during assembly. Several reviews describe unlabeled small parts and screws that are difficult to insert due to misaligned pilot holes. The side burner assembly is particularly fiddly, with some owners reporting it requires three people to align the mounting holes.
What works
- Dual lid thermometers on a budget-priced dual-fuel grill
- Adjustable charcoal pan with smoke stack for temperature management
What doesn’t
- Picture-only assembly instructions cause confusion and frustration
- Side burner mounting requires significant alignment effort
8. Grills House ZH3005Y-SC
The ZH3005Y-SC is an expanded version of the Grills House dual-fuel platform, adding a dedicated 197-square-inch offset smoker chamber alongside the gas and charcoal sections. Total cooking area reaches 1,020 square inches spread across the smoker, primary gas and charcoal zones, and a warming rack. The offset smoker functions as either a traditional smoker for low-and-slow cooking or as an extra charcoal grill, with a side door that simplifies refueling and ash removal without disrupting the main cooking chamber.
The gas side maintains the same 12,000 BTU burners found on the ZH3005, and the charcoal pan is adjustable across three height levels for fine-tuning direct versus indirect heat. The smoker has a 1.5-pound charcoal capacity with its own adjustable air vent, and owners who use it properly report noticeable smoke infusion into ribs and pork shoulders. The 34,000 BTU total output is unchanged from the standard model, but the inclusion of a side burner means you can keep sauces warm while smoking and grilling simultaneously.
The same assembly complaints that affect the standard ZH3005 carry over here — picture-only instructions, unlabeled small parts, and the same fiddly side burner design. The offset smoker adds another layer of complexity to an already involved assembly process. The steel gauge is adequate for occasional smoking but does not match the heavy-gauge material found on purpose-built offset smokers at a similar price point.
What works
- Dedicated offset smoker with side door for fuel and ash access
- 1,020 square inches total cooking area across three fuel zones
What doesn’t
- Assembly instructions remain picture-only and poorly organized
- Steel thickness is adequate but not heavy-duty for frequent smoking
9. LMNOCHM 4-Burner Griddle/Grill Combo
The LMNOCHM model swaps the typical side-by-side fuel layout for a fully modular cooking surface — two interchangeable grill grates and a dual-sided reversible griddle plate that can be arranged in any configuration across the 446-square-inch primary area. The four stainless steel burners produce 49,000 BTU total when including the 9,000 BTU side burner, and the piezo ignition fires on the first press. The double-wall insulated lid traps heat efficiently and includes a thermometer, and the porcelain-enameled cast iron grates resist rust while retaining heat for consistent sear marks.
The grease management system deserves special attention: the tray uses a sloped interior that funnels drippings into a removable collection cup isolated from direct heat, which reduces smoke and smell. The four rugged swivel casters with locks provide 360-degree maneuverability on patios and decks. Owners consistently report that the packaging — wood panels and thick foam — prevents shipping damage, and the assembly instructions are noticeably clearer than the Grills House models. Cooking performance earns praise for even heat distribution and easy temperature control across all four burners.
The 446-square-inch primary area is the smallest on this list, and the lack of a dedicated charcoal chamber disqualifies it as a true dual-fuel grill in the traditional sense. The griddle/grill inserts offer cooking versatility, but you are still limited to propane as the sole heat source. Users who want actual smoky charcoal flavor will need to supplement this grill with a separate charcoal vessel.
What works
- Modular grate/griddle system lets you customize the entire cooking surface
- Excellent packaging prevents shipping damage; clear assembly guide
What doesn’t
- No charcoal firebox — runs on propane only
- Primary cooking area is compact; not suited for large gatherings
Hardware & Specs Guide
BTU Output and Burner Configuration
BTU (British Thermal Units) measures the heat output rate of gas burners, but higher numbers do not automatically translate to better cooking. A four-burner grill running 49,000 BTU can still produce cold spots if the burner tubes are poorly spaced or the flame tamers are mismatched. Pay attention to burner count and layout — three burners at 12,000 BTU each often produce more even heat across the grates than two larger burners because the flames cover a wider physical area. On dual-fuel rigs, the gas side burner count determines how many heat zones you can set simultaneously, which matters when you want to sear steaks on one side and keep vegetables warm on another.
Porcelain-Enameled Cast Iron vs. Steel Grates
Porcelain-enameled cast iron grates combine the heat retention of cast iron with a non-stick, rust-resistant ceramic coating. The enamel prevents the iron from oxidizing when exposed to moisture, which is the primary failure mode of bare cast iron grates. Stainless steel grates are lighter, never rust, and clean easily with a wire brush, but they cannot store as much thermal energy, meaning food may not develop the same quality of sear marks. For combination grills where the charcoal side relies on radiant heat transfer, cast iron grates provide the surface stability needed to maintain temperature when you open the lid.
FAQ
Can I use both the gas and charcoal sides of a combo grill at the same time?
Why does my charcoal side struggle to reach smoking temperatures under 250 degrees Fahrenheit?
How often should I replace the grease collection cup on a dual-fuel grill?
Final Thoughts: The Verdict
For most users, the combo grill winner is the Oklahoma Joe’s Canyon Combo because its offset firebox provides genuine smoking capability that other dual-fuel designs lack, and the dual temperature gauges eliminate the guesswork of managing two different cooking chambers. If you want a gas-powered griddle that expands into smoking territory, grab the Char-Griller Flex Fuel Plus for its 1,260-square-inch total area and removable flat-top insert. And for a budget-conscious entry into dual-fuel cooking without sacrificing porcelain-enameled grates, nothing beats the MFSTUDIO 3-in-1 for its balanced zone coverage and straightforward ash management system.