The Grill That Fits Your Patio — and Still Cooks Like It Means Business.
Three Dual-Tube burners, cast iron grids, and Broil King's Flav-R-Wave flavor system in a compact footprint that doesn't ask you to sacrifice half your deck to use it.
The Broil King Monarch 320 is built for the kind of grilling most people actually do — weeknight dinners, Saturday cookouts, the occasional group of eight when everyone shows up at once. Three stainless steel Dual-Tube burners put 30,000 BTUs across 330 sq. in. of primary cooking space, with the even heat distribution Broil King's Dual-Tube design is known for. Reversible heavy-duty cast iron cooking grids give you serious searing capability and the kind of heat retention that cheaper grids can't match — flip them over and you get a different surface profile for different cooking styles. The stainless steel Flav-R-Wave system turns drippings into flavor instead of flare-ups. Drop-down painted steel side shelves keep your prep space available without eating into patio footprint when you don't need them. And an enclosed cabinet base pulls the whole setup together — this grill looks intentional, not improvised. Available in propane; natural gas version is currently marked no longer available.
Why the Monarch 320 Delivers More Than Its Footprint Suggests
Three numbers that explain the cooking capability packed into a compact frame.
30,000
BTU Main Burners
Three stainless steel Dual-Tube burners spread heat evenly across the full cooking surface — no zones running hot while others barely register.
330 sq. in.
Primary Cooking Space
Enough room for a family dinner or a casual get-together without the oversized footprint of a six-burner setup nobody actually needs.
Cast Iron
Reversible Cooking Grids
Heavy-duty reversible cast iron grids hold heat the way thin rod grids never will — real sear marks, better temperature recovery, two cooking surfaces in one.
What's Included in the Box
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Broil King Monarch 320 Grill Unit
- 3 stainless steel Dual-Tube main burners
- Reversible heavy-duty cast iron cooking grids
- Stainless steel Flav-R-Wave cooking system
- Painted steel drop-down side shelves (2)
- Electronic ignition
- Enclosed cabinet base
Rotisserie kit, grill cover, and side burner are not included — sold separately. No warming rack is listed for this model.
Deep Dive — Monarch 320 Features
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Three-burner performance for practical everyday grilling
With three stainless steel Dual-Tube burners producing 30,000 BTUs, the Monarch 320 is engineered for steady heat distribution across the main cooking surface. Its practical burner configuration makes it a strong fit for homeowners who want reliable day-to-day grilling without stepping into a larger or more complex freestanding setup.
Cast iron cooking grids and Flav-R-Wave flavor performance
Reversible heavy-duty cast iron cooking grids help support strong searing performance and better grilling control, while the stainless steel Flav-R-Wave cooking system helps vaporize drippings and return richer barbecue flavor to the food. Together, these core Broil King cooking components help the Monarch 320 feel more substantial than many basic compact grill options.
Compact freestanding design with practical workspace
Painted steel drop-down side shelves give you useful prep space when needed and help conserve room when folded, while the enclosed cabinet base creates a cleaner and more finished patio presentation. For buyers building a more complete outdoor cooking setup, the Monarch 320 offers a balanced mix of compact size, dependable construction, and everyday usability.
A patio-friendly grill for smaller outdoor layouts
Because of its more compact freestanding footprint, the Monarch 320 is especially appealing for buyers who want premium Broil King grilling performance in patios, decks, or backyard areas where space is more limited. It is a strong option for routine family use while still maintaining the durability and cooking features expected from the Monarch series.
Broil King Monarch 320 Features & Benefits
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3 stainless steel Dual-Tube burners: Delivers 30,000 BTUs of dependable grilling power for everyday outdoor cooking.
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330 sq. in. primary cooking space: Gives you practical room for family meals, routine grilling, and small-group entertaining.
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Reversible heavy-duty cast iron cooking grids: Provides strong heat retention and versatile grilling control.
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Stainless steel Flav-R-Wave cooking system: Helps vaporize drippings to enhance barbecue flavor while maintaining even heat.
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Electronic ignition: Supports reliable startup for convenient day-to-day grilling.
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Painted steel drop-down side shelves: Creates useful prep space while helping conserve room when folded down.
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Enclosed cabinet base: Gives the grill a cleaner, more finished look for patio-friendly freestanding placement.
Who It's For — The Deck & Den Take
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This is the right grill for someone who wants Broil King quality without needing a lot of space to put it. If your patio, deck, or backyard has real constraints — or if you're cooking for two to four people most of the time and a massive six-burner setup would just be wasteful — the Monarch 320 makes that call easy.
The cast iron grids are the main reason to pick this over a cheaper compact grill. They're reversible and heavy-duty, which means they hold heat through the drop in temperature when you put cold food down, and they'll still be performing well years from now. Most entry-level grills in this footprint use thin rod grids that warp and degrade quickly. These won't.
Who might want to look elsewhere: if you're regularly cooking for six or more people, or you want a warming rack, side burner, or rotisserie — step up to the Regal S 420 Pro or higher. The Monarch 320 is a focused tool, not a multi-tasker. Also worth knowing: the natural gas version is currently no longer available (NLA), so if you're connected to a natural gas line, verify current LP-to-NG conversion options or availability before purchasing.
Practical tip: cast iron grids need a little maintenance that stainless grids don't. Season them lightly with oil before first use and after deep cleaning. It takes five minutes and makes a meaningful difference in both performance and longevity.
- Buyers with smaller patios, decks, or townhome outdoor spaces who don't want to compromise on cooking quality
- Households cooking for two to four people most of the time
- Anyone upgrading from a basic entry-level grill and ready for cast iron grids and a real flavor system
- Buyers who want a clean, finished patio look without a large freestanding footprint
- Propane users (note: natural gas version currently no longer available — verify before ordering)
Full Specifications & Dimensions
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Broil King Monarch 320 Specifications
| Brand |
Broil King |
| Model |
Monarch 320 |
| Collection |
Monarch Freestanding Series |
| Item Numbers |
138-834254-LP (LP), 138-834257NG (NG) |
| Availability Note |
NG listing marked NLA; LP listing active |
| Fuel Type |
Propane Gas or Natural Gas |
| Main Burners |
3 stainless steel Dual-Tube burners |
| Main Burner Output |
30,000 BTU |
| Primary Cooking Space |
330 sq. in. |
| Cooking Grids |
Reversible heavy-duty cast iron |
| Cooking System |
Stainless steel Flav-R-Wave cooking system |
| Ignition |
Electronic ignition |
| Side Shelves |
Painted steel drop-down side shelves |
| Base |
Enclosed cabinet base |
| Weight |
113 lbs. (LP) / 114 lbs. (NG) |
| Assembled Dimensions |
51.8" W x 22" D x 48" H |
Still deciding? Explore Deck and Den's buying guides hub and start with a grill buying guide to compare premium freestanding grills, compact footprints, and fuel options.
Warranty, Shipping & Returns
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Manufacturer Warranty
- Covered by Broil King's Limited Lifetime warranty on the cast aluminum cookbox, 10 years on the Dual-Tube burners, 3 years on the stainless steel Flav-R-Wave system, and 2 years on remaining parts and paint; labor, service calls, removal or reinstallation, shipping, and transportation costs are not covered warranty, honored directly by the manufacturer.
- Warranty applies only to products operated in the country where purchased.
Deck & Den Store Policies
Manuals & Documents
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The linked 20094-40LP and 20094-40NG files are the official Broil King owner’s manuals listed for Monarch models 834254 and 834257. Assembly instructions are provided in a separate Monarch assembly manual.
Frequently Asked Questions
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How many BTUs does the Monarch 320 produce?►
The Monarch 320 has three stainless steel Dual-Tube main burners producing a combined 30,000 BTUs. There is no side burner or rear rotisserie burner on this model.
What is the cooking area on the Monarch 320?►
The Monarch 320 provides 330 sq. in. of primary cooking space. No warming rack is listed for this model, so no additional secondary cooking area is included.
Is the Monarch 320 available in natural gas?►
The natural gas version (item 138-834257NG) is currently marked no longer available (NLA). The propane version (item 138-834254-LP) remains active. If you need natural gas, contact us before purchasing to confirm current availability or conversion options.
What are the assembled dimensions of the Monarch 320?►
Assembled dimensions are 51.8" W x 22" D x 48" H. Weight is 113 lbs. (LP) or 114 lbs. (NG). These dimensions include the drop-down side shelves in the open position; when folded, the footprint is narrower.
What type of cooking grids does the Monarch 320 use?►
The Monarch 320 uses reversible heavy-duty cast iron cooking grids. Cast iron holds heat more effectively than thin rod grids and recovers temperature faster after food is placed on the surface. The reversible design gives you two different cooking surface profiles in one grid set. Cast iron does require occasional seasoning — a light coat of oil before first use and after deep cleaning keeps them performing well.
How does the Flav-R-Wave cooking system work on the Monarch 320?►
The stainless steel Flav-R-Wave system sits between the burners and the cooking grids. It is designed to vaporize drippings from food — converting fat and juices into smoke that circulates back up around the food rather than falling onto a bare burner and causing flare-ups. The result is more even heat and more barbecue flavor in the finished food.
Does the Monarch 320 include a rotisserie kit or side burner?►
No. The Monarch 320 does not include a rotisserie kit or side burner — those are sold separately if compatible accessories exist for this model. If rotisserie or side burner capability is important to you, consider stepping up to the Regal S 420 Pro or a higher Broil King model.
Can the Monarch 320 be used as a built-in grill for an outdoor kitchen?►
No. The Monarch 320 is a freestanding grill — it does not have cutout dimensions for island or cabinet installation. If you are planning an outdoor kitchen island, Broil King's Imperial and Regal Built-in series are designed for that purpose.
What warranty covers the Broil King Monarch 320?►
The Monarch 320 is covered by Broil King's manufacturer warranty, honored directly by Broil King. The warranty provides Limited Lifetime coverage on the cast aluminum cookbox, 10 years on the Dual-Tube burners, 3 years on the stainless steel Flav-R-Wave system, and 2 years on remaining parts and paint; labor, service calls, removal or reinstallation, shipping, and transportation costs are not covered. Warranty applies only to products purchased and used in the country of purchase.
Does this grill require assembly?►
Yes, some assembly is required. Broil King provides an owner's manual for the Monarch 320 — see the Manuals & Documents section above. Broil King provides a separate Monarch assembly manual (10084-E34), while the linked 20094-40LP and 20094-40NG files are the correct official owner’s manuals for models 834254 and 834257.
How does Deck & Den ship this grill?►
Deck & Den offers free shipping on orders over $100 within the contiguous United States. For specific lead time questions, see our shipping policy page or contact us before ordering.
How does the Monarch 320 compare to the Regal S 420 Pro?►
The Monarch 320 is Broil King's compact three-burner option; the Regal S 420 Pro is a four-burner step-up model. Key differences: the Regal S 420 Pro has 50,000 BTUs vs. 30,000 BTUs here, 500 sq. in. vs. 330 sq. in. of primary cooking space, a stainless steel warming rack, 9 mm solid stainless steel cooking grids vs. cast iron grids here, and Linear-Flow valves with 180° Sensi-Touch control vs. standard electronic ignition. The Monarch 320 is the right call if you want a smaller footprint and cast iron grids at a lower price point; the Regal S 420 Pro is the upgrade if you need more space, more BTUs, or premium stainless grid performance.
