Stove Propane Gas: A Commercial Kitchen Guide

A propane commercial stove runs on liquid propane (LP) drawn from an on-site tank rather than utility natural gas piped from the street. Propane is the right fuel choice when natural gas service is unavailable, when the operation is mobile (food truck, catering, pop-up), or when the site is rural or off-grid. This guide covers when to choose propane over natural gas, what to look for in a commercial LP stove, how LP supply and tank sizing works, what propane costs to run, and the install and code requirements that separate a compliant LP install from one that fails inspection.

The Atosa AGR series is the workhorse propane range for independent restaurants, food trucks, catering kitchens, and rural sites. Every AGR ships in both factory NG and factory LP configurations at the same price, and every NG unit ships with the LP conversion kit packed inside the oven cavity for sites that switch fuels later.

When to Choose a Propane Commercial Stove

Propane is the right fuel when one or more of these conditions apply:

• No utility natural gas at the site. Rural locations, properties beyond the utility service area, new construction in areas without NG infrastructure, and existing buildings on heating oil or electric where adding NG service would require trenching and a utility tap that costs more than the propane install over the equipment lifetime.
• Mobile operation. Food trucks, food trailers, mobile catering rigs, and pop-up restaurants all run propane because the LP tank travels with the rig. Natural gas cannot move with a mobile operation.
• Off-grid or remote. Mountain lodges, campground concessions, beach kitchens, and seasonal operations where utility natural gas was never run or is impractical to install.
• Catering kitchen with mixed-use. A commissary or catering kitchen that supports both fixed-location and mobile service often standardizes on propane so the same equipment, training, and supply chain serves both operations.
• Site already has LP infrastructure. Many rural restaurants already run propane for water heating, space heating, and existing cooking equipment. Adding a new LP range to an existing tank and distribution is simpler and cheaper than adding NG.

If utility natural gas is available at the property and the operation is fixed-location, choose natural gas. NG costs roughly half of propane per delivered BTU and avoids tank delivery scheduling, tank rental fees, and the seasonal vaporization issues that affect LP supply in cold weather. See the natural gas ranges guide for the NG decision and economics.

Propane Commercial Stove Sizing

Commercial propane stoves are sized the same way as natural gas units: by burner count, by width, by total connected BTU, and by oven configuration. The AGR series covers the full size range for independent operations.

• Atosa AGR-4B-LP (24 inches wide, 4 open burners at 32,000 BTU each, 1 standard oven at 27,000 BTU): 152,000 BTU total. Right-sized for small cafes, breakfast operations, food trucks, and catering rigs. See the AGR-4B-LP product page.
• Atosa AGR-6B-LP (36 inches wide, 6 open burners, 1 standard oven): 219,000 BTU total. The volume seller for independent restaurants, gastropubs, and full-service operations doing 100 to 300 covers per service. See the AGR-6B-LP product page.
• Atosa AGR-8B-LP (48 inches wide, 8 open burners, 2 standard ovens): 310,000 BTU total. Sized for high-volume operations, banquet kitchens, and any operation needing two ovens for separate temperature zones. See the AGR-8B-LP product page.
• Atosa AGR-10B-LP (60 inches wide, 10 open burners, 2 standard ovens): 374,000 BTU total. The flagship for high-volume independent restaurants, hotel banquet kitchens, and catering commissaries. See the AGR-10B-LP product page.

Browse the full propane gas range collection for combination models (range with griddle, range with raised broiler) and other configurations. For the full lineup including natural gas counterparts, see the commercial range collection.

LP Tank Sizing for Commercial Stoves

The biggest difference between a natural gas install and a propane install is the tank. NG is piped continuously from the utility; LP is delivered to an on-site tank that has a finite capacity and a finite vaporization rate. Sizing the tank wrong is the most common LP install mistake.

Vaporization Rate, Not Just Capacity

A propane tank stores LP as a liquid under pressure. The stove burns the gas vapor that boils off the liquid surface. The rate at which liquid LP turns to vapor (the vaporization rate) is limited by the tank surface area, the outdoor air temperature, and the percentage of liquid remaining in the tank. A tank that is half full vaporizes faster than one that is nearly empty. A tank in 80-degree weather vaporizes faster than one in 20-degree weather.

If you draw gas from the tank faster than it can vaporize, the tank frosts over, the regulator pressure drops, the burners run lean, and the range fails. This is why a 100-pound LP tank cannot run a high-output commercial range even though the tank holds plenty of fuel for a full day of cooking.

Tank Sizing Guide

• 100-pound tank: Continuous vaporization rate of approximately 90,000 BTU per hour in 70-degree weather, dropping to 60,000 BTU in cold weather. Not adequate for any full-size commercial range. Use only for small countertop equipment or food truck single-burner units.
• 250-pound tank: Continuous vaporization of approximately 200,000 BTU per hour in mild weather. Adequate for an AGR-4B (152,000 BTU) and possibly an AGR-6B (219,000 BTU) if the range is not run at full output continuously. Borderline in cold weather.
• 500-pound tank: Continuous vaporization of approximately 350,000 BTU per hour in mild weather. Adequate for an AGR-6B or AGR-8B with margin. Right-sized for a single full-size range plus auxiliary equipment.
• 1,000-pound tank: Continuous vaporization of approximately 700,000 BTU per hour in mild weather. Required for AGR-10B (374,000 BTU) and for any full cookline running multiple LP appliances simultaneously.
• Bulk tank (500 to 1,000 gallons, buried or above-ground): Used for commissary kitchens, multi-range cooklines, and restaurant operations running LP for cooking, water heating, and space heating from a single supply.

Cold-weather operations need to upsize. Vaporization rate drops 30 to 50 percent in winter compared to summer, and a tank that is adequate in July will struggle in January.

Manifolded Tank Banks

An alternative to a single large tank is a bank of smaller tanks manifolded together. Two 100-pound tanks on a switching regulator double the available vaporization rate while keeping each individual tank small enough to be exchanged at a propane dealer rather than refilled on site. Common for food trucks, where two 100-pound tanks ride in the rig with one in service and one as reserve.

Propane Operating Cost

Propane costs roughly 2 to 2.5 times more per delivered BTU than utility natural gas in most US markets. Sample annual operating cost for an AGR-6B-LP at typical medium-duty operation (10 hours per day, 30 percent average duty cycle, 365 days per year):

• Total annual BTU consumption: 219,000 BTU/hr x 10 hr/day x 0.30 x 365 days = 240,000,000 BTU = 240 MMBTU per year.
• Propane fuel cost at $2.40 per gallon (91,500 BTU per gallon delivered): 240 MMBTU divided by 91,500 BTU per gallon = 2,623 gallons per year. At $2.40 per gallon, $6,295 per year.
• Compare to natural gas at $11 per MMBTU utility rate: $2,640 per year for the same usage.
• Annual cost difference: $3,655 per year in favor of natural gas, single range only.

Propane prices fluctuate seasonally (higher in winter due to heating demand) and regionally. The numbers above use a 12-month average for a US commercial LP account; your actual cost depends on your local dealer, contract terms, and tank size (bulk tank fills are cheaper per gallon than exchange-tank service).

Propane Install Requirements

An LP install for a commercial range follows the same general framework as natural gas with propane-specific additions for tank placement and code compliance.

Pre-Install Checklist

• LP tank sized for total connected BTU load including the range, water heater, space heater, and any other LP appliances. Account for cold-weather vaporization rate.
• Tank placement compliant with NFPA 58 and local fire code: typically 10 feet minimum from any building opening, 5 feet from any property line, and clear of vehicle traffic with bollard or barrier protection if needed.
• Two-stage regulation: a first-stage regulator at the tank drops tank pressure (which varies with temperature, typically 100 to 200 psi) to an intermediate pressure (typically 10 psi). A second-stage regulator at the building drops intermediate pressure to manifold pressure (10 inches water column for the range).
• Building supply line sized by a licensed plumber against total connected LP load. Black iron pipe, copper, or approved CSST per local code.
• Shutoff valve, flex hose, quick-disconnect, restraint cable at the range location.
• Type 1 hood with wet-chemical fire suppression sized to BTU connected load (identical to NG requirement).
• Makeup air sized to match hood exhaust volume.
• Electrical outlet for the oven thermostat and pilot ignition module (most AGR-LP units require 120V within reach of the supplied cord).
• LP detection sensor required by some local codes, mounted low on the wall (LP is heavier than air and accumulates at floor level).

Install Day Sequence

• Range delivered, uncrated, inspected for shipping damage. Verify the rating plate shows the LP configuration and 10 inch water column manifold pressure.
• Range placed in final position with the back accessible.
• Flex hose connected to the range intake (3/4 inch NPT) and the building LP supply.
• Gas leak check with soap solution at every fitting. No bubbles allowed.
• Manifold pressure verified with a manometer at the test port. Target is 10 to 11 inches water column with at least 50 percent of burners plus oven firing at maximum.
• Each burner lit and inspected for steady blue flame with sharp inner cone and slight yellow tips. Air shutter adjusted as needed.
• Oven brought to 350 degrees Fahrenheit from cold. Verify 12 to 15 minute heat-up time.
• Restraint cable installed between the range and the wall.
• Final inspection by the building department and fire marshal, including tank placement check.

Propane Commercial Stove Code and Safety

Propane installations are governed by both general gas appliance codes and propane-specific codes. The inspector will reference these documents directly on plan check and final inspection:

• NFPA 58 Liquefied Petroleum Gas Code (United States). The primary code governing LP storage, handling, and distribution. Covers tank size and placement, venting, leak detection, and emergency shutoff.
• NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations. Governs Type 1 hood design, exhaust CFM relative to BTU load, hood-mounted fire suppression, and grease duct construction. Every commercial range install (NG or LP) is reviewed against NFPA 96 by the fire marshal.
• CSA B149.2 Propane Storage and Handling Code (Canada and CSA-adopting jurisdictions).
• ANSI Z83.11-2016 commercial gas food service equipment standard. Applies to both NG and LP commercial ranges and confirms the appliance is rated and listed for commercial use.
• ETL or UL listing on the range as a commercial gas appliance. The AGR series carries ETL listing through Intertek (control number 4003935).
• NSF/ANSI 4 sanitation listing for foodservice equipment.
• Local fire code amendments on tank placement, distance from buildings, fencing or barrier requirements, signage, and emergency shutoff valve location.

Propane is heavier than air. A leak does not dissipate upward like natural gas; LP gas accumulates at floor level until it reaches an ignition source. Two implications:

1. LP-fired equipment is generally prohibited below grade. Most jurisdictions do not allow LP appliances in basements regardless of ventilation, because the heavier-than-air gas will pool in the lowest space.
2. LP detection sensors mount low on the wall (typically 18 inches above floor), not high like CO or smoke detectors. The sensor needs to see gas accumulating at floor level before the gas reaches ignition concentration.

Mercaptan and Leak Response

Propane, like natural gas, is odorized with ethyl mercaptan or a similar sulfur compound that produces the characteristic "rotten egg" smell so leaks can be detected. If you smell mercaptan at the range, the tank, or anywhere on the LP line:

• Do not light any flame, switch, or electrical device. Any spark can ignite accumulated LP.
• Close the LP supply valve at the tank if you can do so without entering the area where gas is accumulating.
• Open doors and windows to ventilate.
• Evacuate the building. Move everyone to a safe distance.
• Call the LP supplier emergency line from a safe distance. Most LP dealers have a 24/7 emergency number on the tank decal or on the delivery invoice.
• Do not re-enter until the dealer or the fire department has cleared the building.

Soapy Water Leak Test

After any connection work (new install, tank swap, hose replacement, orifice change), confirm the joints are tight with a soapy water leak test before lighting any burner:

• Mix a few drops of dish soap into a cup of water until it foams when stirred. Commercial leak detector spray works the same way.
• Open the LP supply valve at the tank to pressurize the line. Leave all burner and oven valves closed.
• Brush or spray the soapy solution onto every connection: tank valve, regulator inlet and outlet, flex hose ends, manifold inlet, shutoff valve, and the joint behind the range.
• Watch for growing bubbles. A steady stream of bubbles at any joint means LP is escaping. A few stray bubbles from the brushing action are normal and stop after a few seconds.
• If a connection bubbles, close the tank valve, vent the line, and tighten or reseal the joint. Retest. Do not light any burner until every connection passes.
• Never use a flame to test for leaks. Some online videos still show this. It is dangerous and against code.

Atosa AGR-LP: Factory Configuration Details

Every Atosa AGR-LP part number ships from the factory configured for propane service:

• LP orifices installed at every burner: LP51 at the open burners (32,000 BTU), LP52 at the griddle burners on combo units (27,000 BTU), LP53 or LP54 at the oven burners depending on burner geometry.
• Regulator set to LP position with the convertible plunger in the LP configuration. Manifold pressure is 10 inches water column.
• LP rating plate applied at the factory.
• NG conversion kit packed inside the oven cavity in case the range is later moved to a natural gas site. The NG kit includes NG orifices, the regulator setting instructions, and the NG rating plate.
• 3/4 inch NPT manifold intake matches both NG and LP installations.

If you ordered an AGR-NG by mistake for an LP site, the conversion kit is in the oven cavity and a licensed technician can convert the range in 1.5 to 3 hours. See the gas range propane conversion guide for the full conversion procedure.

Battery Ignition for Off-Grid and Mobile Operations

Some propane commercial ranges and ovens use a single-D-cell battery to power the spark ignition, which means the range will light and run with no electrical service at all. This matters for three scenarios:

• Food trucks and trailers where generator runtime is limited or the operator wants to cook without running the genset.
• Pop-up and catering setups at venues without nearby electrical service, where running an extension cord is impractical.
• Power outage continuity in fixed restaurants. A propane range with battery ignition keeps producing food when the grid is down, as long as the hood and fire suppression are independently powered or the operation moves to limited service.

Confirm battery ignition before ordering if off-grid operation matters. Many commercial ranges (including the Atosa AGR series) use standing pilots rather than battery spark ignition, which also runs without electricity but burns a small amount of LP continuously. Standing pilot is the older approach, simpler, and adds roughly 1 to 2 percent to annual LP usage. Battery spark ignition uses no fuel between lights but requires a fresh D-cell once or twice a year.

Propane vs Natural Gas: Quick Decision Framework

Use this framework when deciding between LP and NG for a commercial range install:

• Utility NG available at the site: Choose NG. Lower operating cost, no tank delivery, no vaporization issues, no seasonal price swings. Order the AGR-NG part number.
• No utility NG at the site, fixed location: Choose LP with a properly sized tank. Order the AGR-LP part number. Plan tank capacity for cold-weather vaporization. Budget for higher annual fuel cost than NG.
• Mobile operation (food truck, catering rig): Choose LP. Order the AGR-LP part number. Use two manifolded 100-pound exchange tanks or a single 250-pound stationary tank depending on rig configuration and route.
• Rural site with existing LP infrastructure: Choose LP, leverage the existing tank and supply. Order the AGR-LP part number. Verify the existing tank vaporization rate handles the added connected load.
• New construction with budget for utility tap: Pull NG service if utility natural gas is within reasonable trenching distance. Long-term operating cost savings recover the tap fee within 3 to 5 years for most operations.

Propane Stove Buying Pitfalls

Common mistakes when buying a propane commercial range:

• Ordering NG and assuming the conversion kit covers it. The conversion kit ships with every AGR, but conversion takes licensed labor and adds $200 to $400 to the install. For new orders, order the LP SKU directly.
• Undersizing the LP tank. A 100-pound tank cannot run an AGR-6B. The fuel is there but the vaporization rate is not. Size tanks by vaporization rate, not by gallon capacity.
• Buying residential LP equipment for commercial use. Residential LP ranges are UL-listed for residential use only, not NSF certified for foodservice, and will fail commercial building inspection. Order commercial NSF-listed equipment (Atosa AGR series and other NSF-listed commercial brands).
• Skipping the LP rating plate check at receiving. If the box says LP but the rating plate inside says NG, the unit was mispulled at the warehouse. Catch this at receiving, before install. Fixing it later means a return or a paid conversion.
• Installing without coordinating hood and fire suppression. LP ranges need Type 1 hood and wet-chemical suppression identical to NG. Some operators forget this for converted ranges or mobile rigs in commissary settings.
• Mixing LP and NG distribution. NG and LP cannot share supply lines, regulators, or distribution. They are separate systems with different pressures, different orifice sizes, and different code requirements.

The Low-Simmer Challenge on Propane Burners

A common complaint with propane commercial ranges is that the burners do not simmer truly low. The flame fluctuates, lifts off the ports, or blows out from a side draft when the operator tries to hold a delicate sauce or melt chocolate. This is usually fixable:

• Clogged burner ports. Partially blocked ports on the low side of the burner ring force the flame to a few open ports, which causes flicker and lift-off. Clean the burner head with a soft nylon brush and clear individual ports with a wooden toothpick. Never use steel wire or a drill bit.
• Inconsistent regulator pressure. If manifold pressure drifts below 10 inches WC under load, low-flame simmer becomes erratic. Verify pressure with a manometer at the test port with all burners off, then with the oven and two burners running. Drift below 10 inches under load points to a weak regulator spring or undersized tank vaporization.
• Draft exposure. Propane flames are physically smaller at the same BTU rating than NG flames and are more sensitive to side drafts from open doors, makeup air registers, or fans. Reposition the range or add a draft shield if a vent or door blows directly across the cookline.
• Air shutter set too lean. Over-aerated propane flame burns blue with a sharp cone but lifts off the burner at low settings. Close the air shutter slightly until the flame stays seated at the lowest valve position. Yellow tips at the very tops of the flame are normal on properly tuned LP.
• Burner choice matters. For sauces, soups, and reductions that need true low heat, hold one burner of the range as a dedicated simmer station and keep the high-output burners for sear and stockpot work. The Atosa AGR-6B 32,000 BTU open burners can simmer once the above items are dialed in, but a dedicated stockpot or candy burner is the answer if your menu lives on low-temp work.

Propane Stove Maintenance

Maintenance for an LP commercial range is nearly identical to NG with two LP-specific items:

• Annual manometer verification. LP regulator springs lose tension over time. A pressure check at the test port confirms the manifold is holding 10 to 11 inches water column under load. Manifold pressure drift below 10 inches WC causes long cook times and undersize flames.
• Tank inspection and recertification. Portable LP tanks have a 12-year recertification cycle. Stationary tanks have annual inspection requirements set by the supplier and local code. The tank dealer handles this on the delivery schedule.
• Orifice cleaning. Same procedure as NG: compressed air or soft nylon brush, never steel wire or drill bits. Enlarging a precision-drilled orifice raises BTU output above safe levels.
• Pilot flame check. LP pilot flames should burn at 1/4 to 1/2 inch tall. A pilot too high sooths the thermocouple and causes premature safety valve failure.
• Air shutter adjustment. Check annually. LP runs leaner than NG. The flame should be blue with sharp inner cone and slight yellow tips at the outer flame, not lifting off the burner ports.
• Standard maintenance: daily burner port cleaning, monthly drip tray cleaning, annual hood and fire suppression inspection. See commercial gas range tips for the full maintenance schedule.

Frequently Asked Questions

What is the difference between a propane stove and a natural gas stove? The fuel and the orifice and regulator settings. Propane operates at higher manifold pressure (10 inches water column vs 5 inches for NG) and uses smaller orifices because of its higher energy density. The cooktop and oven hardware is otherwise identical on the Atosa AGR series.

Can I use a propane stove indoors in a restaurant? Yes, for commercial-rated LP equipment. The Atosa AGR-LP series is rated for indoor commercial use with proper Type 1 hood and ventilation. Residential LP ranges and outdoor LP burners are not rated for indoor commercial use.

How long does a 100-pound propane tank last on a commercial stove? Depends on usage. An AGR-4B-LP at 152,000 BTU running 2 hours per day at 50 percent duty cycle consumes about 1.65 gallons per hour, so a 100-pound tank (23.6 gallons) lasts about 14 hours of cook time or 7 cooking days. Most commercial operations need a 250-pound tank or larger.

Do I need a regulator for a propane commercial stove? Yes, always. Tank pressure varies from 100 to 200 psi depending on temperature. The range manifold needs 10 inches water column. A two-stage regulator system (first stage at the tank, second stage at the building) drops the pressure in two steps.

Can a propane commercial stove be used outdoors? No, not as a primary commercial cooking appliance. Indoor commercial stoves are not weatherproofed and have not been tested for outdoor wind and weather conditions. For outdoor commercial cooking, use outdoor-rated equipment with proper certification (most outdoor commercial cooking uses dedicated outdoor units, not indoor ranges).

Why does my propane stove flame look orange? Orange or yellow flames indicate incomplete combustion. Common causes: air shutter closed too far (open it slightly), orifice partially clogged (clean with compressed air), or manifold pressure too low (check with manometer). Persistent yellow flames produce carbon monoxide and need immediate diagnosis by a licensed technician.

How much propane does a commercial stove use per hour? Depends on burner configuration and duty cycle. At 100 percent output, an AGR-4B (152,000 BTU) consumes 1.66 gallons per hour, an AGR-6B (219,000 BTU) consumes 2.39 gallons per hour, an AGR-8B (310,000 BTU) consumes 3.39 gallons per hour, and an AGR-10B (374,000 BTU) consumes 4.09 gallons per hour. Real-world consumption is 20 to 40 percent of these maximums depending on duty cycle.

Is propane cheaper than natural gas for a restaurant? No. Propane costs roughly 2 to 2.5 times more per delivered BTU than utility natural gas in most US markets. Propane is the right choice only when NG service is unavailable or the operation is mobile.

Does the Atosa AGR-LP ship ready for propane? Yes. The AGR-LP part numbers ship from the factory with LP orifices installed, the regulator set to LP, and the LP rating plate applied. The NG conversion kit is packed inside the oven cavity in case the range is later moved to a natural gas site.

What permits do I need to install a propane commercial stove? Typically a building permit, a gas piping permit, and a propane tank placement permit. The building department and fire marshal both review propane installs. Permit cost varies by jurisdiction, typically $100 to $500 total. The licensed plumber handling the install usually pulls the permits.

Can I run a commercial propane stove on a residential propane tank? Almost never. Residential LP tanks are sized for water heating, dryer, and grill loads, typically 50 to 150 pounds. They cannot sustain the BTU demand of a commercial range running multiple burners at full output. The tank frosts over from vaporization cooling and the regulator pressure drops below the range manifold target.

How often does a commercial propane tank need to be refilled? Depends on tank size and usage. A 250-pound tank serving an AGR-4B at medium-duty operation typically refills every 4 to 8 weeks. A 500-pound tank refills every 8 to 16 weeks. Bulk tanks on a contract delivery schedule are usually topped off automatically by the dealer based on remaining percentage.