Atosa Charbroilers

The Atosa Commercial Charbroiler Lineup: Complete Model Guide

Atosa builds two distinct families of commercial charbroilers for the US foodservice market: the ATRC radiant series in 24, 36, and 48 inch widths, available in both natural gas and propane configurations, and the ATCB-24 char rock model. Together, these five chassis cover the vast majority of independent restaurant, food truck, casual dining, and bar and grill applications where a sub-60-inch commercial charbroiler is the right answer.

This guide is the model-by-model reference for operators who have already decided to buy an Atosa charbroiler and need the specific BTU figures, dimensions, burner counts, grate configurations, and fuel options to finalize a purchase decision. If you are still comparing brands or evaluating whether a charbroiler is even the right equipment category, start with our Commercial Charbroiler Buying Guide first.

The Atosa charbroiler lineup is positioned for independent restaurant operators who want commercial-grade radiant performance, durable cast iron grates, and serviceable parts at a price point that makes practical sense for restaurants outside the largest chain operators. Every unit in this guide ships ready to install under a Type I hood with standard NG or LP gas connections.

Why Atosa for a Commercial Charbroiler

Atosa charbroilers are built around three priorities the brand is known for: consistent and intense cooking temperatures across the full grate, rapid recovery time when proteins hit the cold-load zone, and welded unitized chassis construction with no decorative trim or unnecessary frills. The ATRC and ATCB lines ship with 35,000 BTU stainless steel burners, stainless steel radiant plates or lava briquettes, heavy cast iron grates, and the same chassis in both natural gas and propane variants. The result is a workhorse charbroiler that delivers signature sear marks on steaks, chops, burgers, chicken with crispy skin, salmon, shrimp, and charred vegetables, at a price point that supports independent restaurants, food trucks, and growing chains alike.

Three reasons drive the Atosa charbroiler purchase decision for most operators on our customer base.

Heavy-Gauge Construction

The ATRC and ATCB chassis use heavy-gauge stainless steel for the body, heavy cast iron grates that hold searing temperature under cold-load, and steel radiants engineered for continuous restaurant service. The construction standard is what restaurant operators expect from commercial equipment, not the lighter-duty residential-derived units that show up at this price point from other importers.

Parts Availability and Serviceability

Atosa maintains a parts inventory and service network that operators can actually reach when something breaks. Burners, radiants, grates, knobs, gas valves, and pilot assemblies are all stocked as service parts and most can be replaced by a competent equipment technician without specialized tooling. This matters more than the spec sheet on day one: a charbroiler is a multi-year equipment investment and the difference between a unit you can repair and a unit you have to replace is what determines real lifetime cost.

Same Chassis in NG and LP

Every ATRC model ships in matched natural gas and propane variants of the same chassis, with only the burner orifices and regulator changing between fuel types. This means a food truck operator running propane and a fixed restaurant running natural gas get identical cooking performance, identical dimensions, identical grates, and the same parts ecosystem. It also means if your operation changes fuel infrastructure down the line, conversion is a parts swap rather than a full unit replacement.

Three Functions of the Atosa Radiant Plate

The heavy-gauge steel radiant plate sitting between the burner and the cast iron grates is the engineering feature that defines the ATRC series. It performs three technical functions simultaneously:

Burner shielding. The radiant blocks direct contact between dripping fat and the burner ports below. Burners on a radiant-style charbroiler last significantly longer than burners on units where fat drips directly onto the flame, which is the primary failure point on lower-tier designs.

Convection to infrared conversion. The radiant absorbs the convective heat from the gas flame and re-emits it as infrared (IR) radiation upward into the cooking grate. IR is the cooking mechanism that produces the deep, even sear on steaks, chops, and burgers. This conversion is what separates a true commercial charbroiler from a generic open-flame grill.

Controlled vaporization. When fats and juices drip onto the hot radiant, they vaporize into a flavorful smoke that rises back through the grates and bastes the food. Because the radiant is metal rather than porous, the vaporization is controlled and predictable, without the uncontrolled flare-ups that plague lava rock units as the rocks become grease-saturated.

Stainless Steel Burners: 35,000 BTU Per Burner

Every Atosa charbroiler in the ATRC and ATCB lineup uses heavy-duty stainless steel burners rated at 35,000 BTU per burner. Stainless is the preferred burner material on a radiant-style charbroiler because it resists the corrosive effects of falling fat better than standard carbon steel and maintains a more consistent flame pattern over years of continuous service.

The 35,000 BTU rating is high enough to prevent the "stewing effect" that occurs on undersized units, where cold protein hitting a hot grate drops the surface temperature so far that the burner cannot recover before the next load arrives. Stewing produces gray, rubbery proteins instead of seared ones. The 35,000 BTU output per burner on Atosa charbroilers restores grate temperature in seconds even under heavy load, which is the difference between a unit that runs the line and a unit that bottlenecks it.

Each burner is controlled by an independent manual valve, which lets the cook create distinct heat zones across the cooking surface. A two-burner ATRC-24 supports two zones, a three-burner ATRC-36 supports three, and a four-burner ATRC-48 supports four. Independent zones let the line sear high-fat proteins on one section while gently finishing leaner items or holding cooked product on another.

The Atosa Radiant Series (ATRC)

The ATRC series is the radiant-style charbroiler line, where heavy steel radiants sit between the burners and the cast iron grates to distribute heat evenly, funnel drippings into the grease trough, and minimize flare-ups. Radiant is the right choice for the vast majority of restaurant operations because it delivers excellent sear character with manageable cleaning labor and fast recovery time between loads.

ATRC-24 (24-inch Radiant Charbroiler)

Specification	Value
Width	24 inches
Number of burners	2 stainless steel burners
Total BTU output	Approximately 70,000 BTU/hr
Per-burner BTU	35,000 BTU each
Fuel options	Natural gas (ATRC-24) or propane (ATRC-24-LP)
Ignition	Standby pilots
Heat distribution	Stainless steel radiant plates
Grate material	Heavy cast iron, adjustable multi-level top grates
Approximate cooking area	Roughly 432 square inches
Approximate depth	27 inches
Approximate height	15 inches
Legs	Adjustable stainless steel legs
Gas connection	Standard commercial 3/4 inch NPT rear inlet
Controls	Independent manual controls per burner
Certifications	NSF, ETL, ETL-Sanitation, cETLus

For a walkthrough of the ATRC-24 build quality, controls, and cooking surface, see the Restaurant Warehouse YouTube video on the Atosa ATRC-24. Shop the unit directly: Atosa ATRC-24 natural gas or Atosa ATRC-24 propane.

Who should buy the ATRC-24. Food trucks, mobile concepts, food halls, small bistros, cafes, secondary grill stations on larger lines, ghost kitchens, and any operation tight on hood space or floor footprint. The 24-inch is the highest-volume size in foodservice by unit count and the ATRC-24 is one of the most-purchased charbroilers in the Atosa lineup for that reason. Two burners give you enough recovery capacity for moderate-volume service of burgers, chicken breasts, smaller steaks, and a typical bar and grill menu mix.

Where it bottlenecks. A 24-inch unit is not the right answer for a high-volume steakhouse, a busy burger chain location, or any operation routinely loading more than 6 to 8 proteins simultaneously. If you are loading the grill heavily during peak ticket times, step up to the ATRC-36.

For a deeper hands-on look at the ATRC-24 specifically, see our Atosa 24-inch Charbroiler Review. For the head-to-head with other 24-inch options, see Best 24-inch Charbroilers.

ATRC-36 (36-inch Radiant Charbroiler)

Specification	Value
Width	36 inches
Number of burners	3
Total BTU output	Approximately 105,000 BTU/hr
Fuel options	Natural gas (ATRC-36) or propane (ATRC-36-LP)
Heat distribution	Steel radiants
Grate material	Heavy cast iron
Approximate cooking area	Roughly 648 square inches
Approximate depth	27 inches
Approximate height	15 inches
Gas connection	Standard commercial inlet
Certifications	NSF, ETL, ETL-Sanitation

Who should buy the ATRC-36. Mid-volume independent restaurants, busy pubs, bar and grill concepts, mid-sized burger restaurants, casual dining cooklines, and any operation where the grill station handles a mainstream menu volume of grilled proteins. For most independent full-service restaurants, the ATRC-36 is the sweet-spot purchase: three burners give clean recovery for typical peak loads, the footprint fits under a standard 4-foot hood section with proper overhang, and the cooking capacity supports 36 to 48 proteins in active cook at any given moment.

Where it bottlenecks. Steakhouses doing heavy steak volume during dinner peak, banquet and event operations cooking dozens of proteins at once, and concepts where the grill is the dominant cooking method by volume should step up to the ATRC-48 for the additional burner and recovery capacity.

Shop the unit directly: Atosa ATRC-36 natural gas or Atosa ATRC-36 propane.

ATRC-48 (48-inch Radiant Charbroiler)

Specification	Value
Width	48 inches
Number of burners	4
Total BTU output	Approximately 140,000 BTU/hr
Fuel options	Natural gas (ATRC-48) or propane (ATRC-48-LP)
Heat distribution	Steel radiants
Grate material	Heavy cast iron
Approximate cooking area	Roughly 864 square inches
Approximate depth	27 inches
Approximate height	15 inches
Gas connection	Standard commercial inlet
Certifications	NSF, ETL, ETL-Sanitation

Who should buy the ATRC-48. Steakhouses, high-volume burger concepts, banquet support operations, casino kitchens, large casual dining restaurants, hotel banquet kitchens, and any restaurant where the grill is a centerpiece of the menu. Four burners deliver clean recovery even under heavy peak loads, and the 864 square inches of cook surface supports 50 to 70 simultaneous proteins in active cook.

Install considerations. A 48-inch charbroiler at 140,000 BTU is a significant gas load. If you are adding the ATRC-48 to an existing line, have a licensed gas contractor verify your existing gas line and regulator can handle the additional draw on top of the rest of your equipment. The hood requirement is at least 60 inches of grease-rated Type I coverage with the recommended 6-inch overhang on each side.

Shop the unit directly: Atosa ATRC-48 natural gas or Atosa ATRC-48 propane.

The Atosa Char Rock Series (ATCB)

The ATCB-24 is the char rock model in the Atosa charbroiler lineup, designed for operators who want stronger smoke flavor character than radiant units produce while keeping the maintenance burden lower than natural lava rock would require.

ATCB-24 (24-inch Char Rock Charbroiler)

Specification	Value
Width	24 inches
Number of burners	2
Total BTU output	Approximately 70,000 BTU/hr
Fuel options	Natural gas (ATCB-24) or propane (ATCB-24-LP)
Heat distribution	Engineered char rocks
Grate material	Heavy cast iron
Approximate cooking area	Roughly 432 square inches
Approximate depth	27 inches
Approximate height	15 inches
Gas connection	Standard commercial inlet
Certifications	NSF, ETL, ETL-Sanitation

Who should buy the ATCB-24. Burger concepts that want a more pronounced charcoal-style flavor, bar and grill operations where smoke character is part of the brand identity, steak-focused independent restaurants in the 24-inch size class, and any operator who has run lava rock in past kitchens and wants the same flavor signature with longer replacement intervals. Char rock is the middle path between radiant (low maintenance, lighter smoke) and natural lava rock (high maintenance, heavy smoke).

Char rock maintenance reality. Char rocks last significantly longer than natural lava rock but still require periodic replacement when they become saturated with carbon and grease. Signals for replacement are the same as natural lava rock: rocks crumble when handled, stay black even on full burner, or produce visibly uneven heat across the grate. Plan replacement intervals into your operating budget.

Shop the unit directly: Atosa ATCB-24 char rock charbroiler.

How to Choose Between ATRC and ATCB

The radiant-vs-char-rock decision comes down to three factors: flavor character, cleaning labor budget, and consumables tolerance.

Choose ATRC (Radiant) If

You want a clean, dark sear with moderate smoke character. You want the lowest possible cleaning labor at end of shift (10 to 20 minutes for the ATRC versus 20 to 35 minutes for rock-style units). You want predictable consumables cost (radiants last several years, no monthly rock replacement). You are running high-volume service where recovery time matters more than smoke character. You are sizing for a 36-inch or 48-inch unit (only the 24-inch is available in char rock).

Choose ATCB (Char Rock) If

Smoke character is a deliberate part of your brand identity and shows up in customer perception. You are running a 24-inch unit and have decided that smoke flavor justifies the additional maintenance. You have the labor schedule and budget to handle longer end-of-shift cleaning and periodic rock replacement. You have run rock-style charbroilers in past kitchens and prefer that flavor signature.

For Most Operators, ATRC Is the Answer

Across the broad mid-market restaurant base, the ATRC is the right answer roughly 80 to 90 percent of the time. Char rock is a specific choice for specific operations. If you are uncertain and just need a charbroiler that works, the ATRC-36 in natural gas is the highest-confidence default purchase in this lineup.

Side-by-Side Model Comparison

Model	Width	Burners	Total BTU	Style	Best Fit
ATRC-24	24 inch	2	70,000	Radiant	Food trucks, small restaurants, secondary stations
ATRC-36	36 inch	3	105,000	Radiant	Mid-volume independent restaurants, pubs, casual dining
ATRC-48	48 inch	4	140,000	Radiant	High-volume steakhouses, burger concepts, banquet
ATCB-24	24 inch	2	70,000	Lava Briquette	Smoke-character concepts in the 24-inch class

Browse current pricing and availability for every model in the Atosa charbroiler collection.

Natural Gas vs Propane Variants

Every Atosa charbroiler in this lineup is available in both natural gas and propane variants. The variants share identical chassis, identical cooking performance, identical dimensions, and identical grates. The only differences are:

Burner orifices. Sized differently for the energy density of each fuel.

Regulator. The propane variant ships with an LP regulator pre-installed.

Operating cost. Propane costs more per BTU than natural gas in nearly every US market. For fixed restaurant installations with natural gas available, NG is almost always the better choice. For food trucks, mobile concepts, outdoor catering operations, and any location without natural gas service, LP is the only practical option.

Field conversion. NG-to-LP or LP-to-NG conversion is possible on these chassis with the correct conversion kit (orifices and regulator), but it should be done by a licensed gas technician, not by the operator. Conversion outside manufacturer specification voids warranty.

Manifold pressure specifications. Atosa charbroilers operate at standard commercial gas pressures: 4 inches water column (4" W.C.) for natural gas and 10 inches water column (10" W.C.) for liquid propane. These pressures must be verified at install by a licensed gas contractor using a manometer at the unit’s pressure tap. Running the unit outside spec produces yellow flames, soot deposits on food, incomplete combustion, and dangerous carbon monoxide output. The standby pilot for each burner is also adjusted at install to provide immediate ignition without excessive gas consumption.

Adjustable Cast Iron Grates: Tilt and Height Control

The cast iron grates on every Atosa charbroiler are adjustable in two dimensions, which is an operational advantage many operators overlook. The grates can be tilted forward to accelerate grease runoff into the front trough, reducing smoke output and flare-up risk during high-volume service. The grates can also be set at multiple height positions above the radiant plates, which controls the distance between the food and the IR heat source.

The grate bars themselves have an engineered wave or V-shape profile rather than a flat top. The peaks of the wave deliver concentrated conductive heat for deep, dark sear marks. The valleys between peaks channel grease and juice away from the flame and toward the trough. This is why Atosa grates produce restaurant-grade marks even when the unit is operated by line cooks who have not been trained on charbroiler technique.

Installation Requirements for the Atosa Lineup

All Atosa charbroilers in the ATRC and ATCB series share the same general install requirements, summarized here. For the full installation guidance with hood sizing, gas line capacity, and clearance specifications, see the Installation Requirements section of our Commercial Charbroiler Buying Guide.

Hood

Type I grease-rated hood with fire suppression, sized to cover the unit footprint plus 6-inch overhang on each side. For ATRC-24 and ATCB-24, plan on at least 36 inches of hood. For ATRC-36, at least 48 inches. For ATRC-48, at least 60 inches.

Gas Line

Natural gas units require a building gas line sized for the additional BTU load. Have a licensed gas contractor verify your existing manifold capacity before installing an ATRC-48. The ATRC-24 and ATRC-36 are smaller loads but should still be verified against total kitchen gas draw including range, fryer, oven, and other gas equipment.

Equipment Stand or Refrigerated Base

Atosa charbroilers are countertop units and require a stand. Options include a plain stainless equipment stand, a refrigerated chef base at matched width (which doubles as cold line storage), or an integrated equipment stand with under-shelving. Plan stand height to put the grate surface between 34 and 38 inches off the finished floor.

Clearances

NFPA 96 and local code dictate clearance to combustible surfaces. Use stainless wall panels behind the charbroiler to minimize required clearance. Verify final clearances against the manufacturer specification sheet and your local AHJ.

Cleaning and Daily Maintenance

Atosa charbroilers respond well to consistent daily and weekly maintenance. The protocols below preserve the unit's full output rating and extend service life.

Daily End-of-Shift

Scrape grates with a heavy grill brush while they are still warm but not blazing. Empty and clean the grease drip tray (the single highest fire-risk item on the cookline). Wipe exterior stainless surfaces with a food-safe degreaser. For cast iron grates, apply a thin coat of high-smoke-point oil and fire burners on low for 15 minutes to re-season the polymerized barrier.

Water in the Drip Pan

During service, keep about one inch of water in the grease drip pan. The water cools grease as it falls (preventing tray fires), prevents grease from baking onto the metal (cutting end-of-night cleaning time), and is a standard professional practice on Atosa and other commercial charbroilers. Refill during service. Drain and clean at end of shift.

Radiant Plate Inspection and Replacement

Stainless steel radiants are durable but they are wear items. In a high-volume operation running the unit 8 to 14 hours a day, plan to inspect the radiants every 90 days for warping, thinning, or holes. In normal restaurant service, expect to replace radiants every 12 to 24 months. Warped or worn radiants produce uneven heat distribution and let drippings reach the burners, which accelerates burner failure. Replacement radiants are stocked as standard Atosa service parts.

Weekly Burner Maintenance

Once a week, with the unit fully cool, remove grates and radiants (or rocks for the ATCB-24). Use a stiff wire brush to clear any clogged burner ports. Carbon buildup progressively blocks orifices, leading to yellow-tipped flames (a sign of incomplete combustion that wastes fuel and produces carbon monoxide). Inspect burner integrity and air shutter cleanliness. Reassemble and verify clean blue flames across all burners.

For the ATCB-24 Specifically

The char rocks need periodic inspection for saturation. Signals for replacement: rocks crumble when handled, stay black even on full burner, or produce uneven heat across the grate. Replace rocks per manufacturer guidance.

For full step-by-step seasoning and cleaning protocols, see how to season a charbroiler and how to clean a charbroiler.

Common Atosa Charbroiler Parts

The parts ecosystem for the Atosa charbroiler lineup is one of the reasons these units are practical for long-term restaurant service. The most-replaced parts on any commercial charbroiler over a 5- to 10-year service life are:

Cast iron grates. Heavy use eventually warps or cracks grates. Replacement is straightforward and grates are stocked as service parts.

Steel radiants (ATRC) or char rocks (ATCB-24). Radiants last several years before warping or burn-through. Char rocks need replacement every several months in high-volume service.

Burners. Typically 5 to 10 years of service life depending on volume. Replaceable with standard tools.

Pilot assembly. Standby pilot units have ignition components (thermocouples, pilot orifices) that wear over time.

Gas valves and knobs. Replaceable as service parts when worn.

Grease tray. The most-cleaned and most-replaced part on any charbroiler. Stocked as a service part.

Reach out to our team for parts diagrams and current parts availability for any model in the lineup.

Atosa Charbroiler Warranty

Atosa provides a standard commercial warranty on the ATRC and ATCB charbroiler lines. Specific warranty terms (length, parts vs labor coverage, exclusions for consumables) are documented in each model's warranty card. Reach out to our team for current warranty documentation on any specific model before purchase.

How to Buy an Atosa Charbroiler

Shop the full Atosa charbroiler collection for current availability of every model in the lineup. Browse the broader commercial charbroiler collection if you want to compare Atosa side-by-side with other available units. For specific fuel-type or style preferences, see the natural gas charbroiler collection, the propane charbroiler collection, or the lava rock charbroiler collection, or the radiant charbroiler collection.

Financing Available

Atosa charbroilers are a significant capital purchase. The Restaurant Warehouse offers restaurant equipment financing with low monthly payments so a 36-inch or 48-inch unit fits inside your operating budget without a large upfront outlay. Financing is available on full lineup orders combining the charbroiler with refrigeration, fryers, prep tables, and the rest of the cookline.

Where to Go Next

Need help sizing? Start with the Commercial Charbroiler Buying Guide for the burner-per-inch rule and full sizing math.

Looking specifically at the ATRC-24 or ATCB-24? Read our hands-on Atosa 24-inch Charbroiler Review.

Comparing 24-inch options? See Best 24-inch Charbroilers.

Just need to know what a charbroiler is? Start with What Is a Charbroiler.

Need maintenance protocols? See how to season a charbroiler and how to clean a charbroiler.

Frequently Asked Questions

What is the difference between the Atosa ATRC and ATCB charbroilers?

The ATRC is the radiant series, using steel radiants to distribute heat from the burners to the grates. The ATCB is the char rock series, using engineered ceramic char rocks. Radiant delivers cleaner, easier maintenance with moderate smoke character. Char rock delivers heavier smoke flavor with more cleaning labor and periodic rock replacement.

What sizes does the Atosa ATRC come in?

The ATRC ships in three widths: ATRC-24 (24 inches, 2 burners), ATRC-36 (36 inches, 3 burners), and ATRC-48 (48 inches, 4 burners). All three are available in both natural gas and propane.

What size does the Atosa ATCB come in?

The ATCB is currently produced in the 24-inch width only (ATCB-24), available in both natural gas and propane variants.

How many BTU does an Atosa charbroiler produce?

The ATRC-24 and ATCB-24 produce approximately 70,000 BTU/hr. The ATRC-36 produces approximately 105,000 BTU/hr. The ATRC-48 produces approximately 140,000 BTU/hr. All four models use 35,000 BTU per burner.

What grates does the Atosa charbroiler use?

All Atosa charbroilers ship with heavy cast iron grates. Cast iron has the highest thermal mass of any grate material, holds searing temperature under cold-load, and produces the deepest sear marks. Cast iron grates require daily seasoning to prevent rust and reduce sticking.

Are Atosa charbroilers NSF certified?

Yes. The ATRC and ATCB charbroilers are NSF certified, ETL listed, and ETL-Sanitation certified, meeting the standard requirements for code-compliant restaurant installation in US jurisdictions.

Can I convert an Atosa ATRC from natural gas to propane?

Yes, with the correct conversion kit (burner orifices and LP regulator) and a licensed gas technician performing the work. Field conversion is supported on the ATRC chassis but must be done to manufacturer specification to maintain warranty.

What hood size do I need for an Atosa ATRC-48?

At minimum, 60 inches of Type I grease-rated hood with fire suppression, sized to cover the 48-inch charbroiler footprint plus the recommended 6-inch overhang on each side. Total CFM requirement depends on your full equipment row and local code.

What is the warranty on Atosa charbroilers?

Atosa offers a standard commercial warranty on the ATRC and ATCB lines. Reach out to our team for current warranty documentation on any specific model before purchase.

How long do Atosa charbroilers last?

A well-maintained Atosa ATRC or ATCB charbroiler typically delivers 10 to 15 years of restaurant service. Burners and grates may need replacement at the 5- to 10-year mark depending on volume. Radiants last several years before warping or burn-through requires replacement.

Where can I get Atosa charbroiler parts?

Atosa stocks replacement parts including grates, radiants, burners, pilot assemblies, gas valves, knobs, and grease trays. Reach out to our team for parts diagrams and availability on any specific model.

What is the best Atosa charbroiler for a steakhouse?

The ATRC-48 is the highest-confidence purchase for a steakhouse, with four burners delivering clean recovery under heavy steak loads and 864 square inches of cook surface supporting peak ticket volume. Some steakhouses pair the ATRC-48 with a separate overhead broiler for finishing steaks after the initial sear.

What is the best Atosa charbroiler for a food truck?

The ATRC-24-LP (propane variant) is the standard answer for food trucks. The 24-inch footprint fits typical truck cookline layouts, two burners give enough capacity for moderate-volume service, and propane is the practical fuel choice for mobile concepts.

What is the best Atosa charbroiler for an independent restaurant?

The ATRC-36 is the sweet-spot purchase for most independent full-service restaurants. Three burners deliver clean recovery for typical peak loads, the 36-inch footprint fits under a standard 4-foot hood with proper overhang, and the cooking capacity supports mainstream menu volume.

Should I buy the Atosa ATRC-24 or ATCB-24?

If you want low maintenance and moderate smoke character, buy the ATRC-24. If smoke flavor is a deliberate part of your brand identity and you can handle longer cleaning and periodic rock replacement, buy the ATCB-24. For the head-to-head comparison, see our Atosa 24-inch Charbroiler Review.